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2000

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Document:	RA82 Disk Drive User Guide
Order Number:	EK-ORA82-UG
Revision:	001
Pages:	190
Original Filename:

OCR Text

EK-ORA82-UG-O01

RA82 Disk Drive
User Guide

EK-ORA82-UG-O01

RA82 Disk Drive
User Guide

Prepared

by Educational Services
of

Digital Equipment Corporation

Digital Equipment Corporation makes no representation that use of its products with those
of other manufacturers will not
infringe existing or future patent rights. The descriptions contained herein do not imply the granting
of a license to make,
use, or sell equipment or software as described in this manual.
|
Digital Equipment Corporation assumes no responsibility or liability for the proper performance of
other manufacturers’
products used with its products.
|

Digital Equipment Corporaticn believes that information in this publication is %accurate as of its publication date. Such

information is subject to change without notice.

erTors.

Digital Equipment Corporation is not responsible for any inadvertent

Class A Computing Devices:

NOT'CE: This equipment generates, uses, and may emit radio frequency energy. It has been tested and found to

comply with the limits for a Class A computing device pursuant to Subpart J of
Part 15 of FCC rules for operation
in a commercial environment. This equipment, when operated in a residential area, may cause interference
to radio/TV
communications. In such event the user (owner), at his own expense, may be required to take
corrective measures.

The postpaid READER'S COMMENTS form requests the user’s critical evaluation to assist in
preparing future
documentation.

The following are trademarks of Digital Equipment Corporation:

VAX
RAS82
RAS81
TA78-81
UNIBUS

DECnet
HSC
KDASO
RA60
VMS

RC25
MicroVAX

KDB50
RA90

UDASO0
SA482
RARSO
TU78-81

April 1988

Contents

About This Manual
1

x1ii

INTRODUCTION
1.1

GENERAL INFORMATION . .. ... ... .. co.ue... e e

1.2

DATA BACKUP

1.3

DRIVE DESCRIPTION ... ... ........ e

. . . . .

e e e e e e e e e e e e e e e e e e e

e e e

e e

1.3.1

Physical and Logical Media Layout . . . . .. ... ...........

1.3.2

Media Format

1.3.3

Internal Microprocessors

. . . . . . . . o e e e e e e e e e e e e e e e e e e e e

. . . . . . . . ¢ v v v v v i v v i

1.4

INTERNAL DRIVE DIAGNOSTICS

1.5

CONTROLLER AND DRIVE CONFIGURATIONS

1.6

RAS82 SPECIFICATIONS . . . . . .

1.7

ELECTROSTATIC DISCHARGE (ESD) . . . . v vttt
..

1.7.1

. . . . . . .

i i i

1-5

e e e

e e et e e e

... ........

it e e e e e e e e e e e e e e

Electrostatic Protection . . ...
.. .. e

e e e e e e e e e e e e e e e e

1.8

Related Documentation

Document Title

Part Number

HSC Disk Controller User Guide

AA-GMEAA-TK

KDAS5O0 Disk Controller User Guide

EK-KDA5Q-UG

KDB50 Disk Controller User Guide

EK-KDB50-UG

UDA50 Disk Controller User Guide

EK-UDAS50-UG

DSA Hand Held Terminal User Guide

EK-DSAHH-UG

H9646 AH/AJ Cabinet System User Guide

EK-H9646-UG

H9642-JA/JB Installation Sheet

EK-9642-IN

881 Power Controller User Guide

EK-881PC-UG

1-18

INTRODUCTION

1.9

ORDERING DOCUMENTATION

Internal DIGITAL customers:
Publication and Circulation Services

10 Forbes Road

Northboro, Massachusetts 01532

(RCS Code: NR12, Mail Code: NRO3/W3)
External DIGITAL customers:

Digital Equipment Corporation
P.O. Box CS2008

Nashua, New Hampshire 03061

or by calling toll-free: (800) 258-1710.
Outside the United States, customers should contact one of the following DIGITAL offices:
Europe:

Digital Equipment International BV

Mervue Industrial Estate

Galway, Ireland
Telephone [353]-(91)-51271
Digital Equipment Parts Centre BV

P.O. Box 6774
NL-6503 GG Nijmegen, Netherlands

Telephone [31]-(80)-529911

Far East and General GIA Area:

Accessories and Supplies Group
P.O. Box CS2008

Nashua, New Hampshire, USA 03061
Telephone (603) 844-5111

2
OPERATING INSTRUCTIONS
2.1

CONTROL PANEL SWITCHES AND INDICATORS

Each switch on the operator control panel has an indicator light that displays the drive

conditions. The RAS82 operator control panel has the following switches and indicators:
RUN/STOP
FAULT

UNIT NUMBER/READY
WRITE PROT
A port
B port

Figure 2—-1 shows the arrangement of these controls on the front panel of the drive.
Table 2—-1 lists the conditions reflected by the state of the indicator lights. The following
paragraphs describe these controls and indicators in more detail.

RUN-STOP SWITCH

PORT

AND INDICATOR

ASWITCH

PORT B SWITCH
~ AND INDICATOR

arop | [FauLtl

|COReapy|

FAULT INDICATOR

AND RESET SWITCH

[Dadtel | A

)

READY

INDICATOR

WRITE PROTECT

SWITCH AND

INDICATOR

CX—1013A

Figure 2-1

Front Panel Controls and Indicators

2—2

OPERATING INSTRUCTIONS

Table 2-1

Indicator Conditions

Indicator

Turned On

Turned Off

RUN/STOP

When disk is spinning

When disk has stopped

FAULT

‘When drive detects a fault

When no faults are

READY

When drive is on cylinder and ready to process host
request (RUN light must be on)

When drive cannot
process host requests
or is not on cylinder
(seeking)

WRITE/PROT

When drive is physically or logically write-protected

When drive is writeenabled

When drive is online to controller A

When drive is not
online to controller A

When drive is online to controller B

When drive is not
online to controller B

2.1.1

detected

RUN/STOP Switch and Indicator

The RUN/STOP switch is a double-action push button. In the IN (RUN) position, the

switch requests a drive spinup and permits initialization of the drive for operation. In the
OUT (STOP) position, the heads are moved off the data cylinders and the spindle motor is
stopped.
CAUTION

If the disk does not spin down after releasing the RUN/STOP switch, contact field
service.

Regardless of the switch position, the RUN/STOP indicator light always reflects the state of

the drive spindle. That is, the indicator light is on while the spindle is turning and off when
it has stopped.

If the RUN/STOP switch is in the run position on powerup, spinup can be initiated either
automaltically by the controller or by manually toggling the RUN/STOP switch.
If the drive is online and operating when the switch is placed in the stop position, the drive
completes all outstanding operations commanded by the controller before spinning down.
NOTE

A minimum three-minute delay is recommended between each start and restart to
prevent opening the thermal circuit breaker of the spindle motor.

OPERATING INSTRUCTIONS

2-3

2.1.2 FAULT Switch and Indicator
The FAULT light indicates a fault or error condition within the drive. The FAULT reset
switch displays front panel fault codes and clears drive conditions.
NOTE

Some drive conditions cannot be cleared by pressing the FAULT switch.

When the disk drive detects an error, the FAULT light turns on. Some faults are corrected
automatically, and the light goes off. If this does not occur, the light stays on and the FAULT
button must be pushed. The drive stays in its current operating state until the condition is
corrected.

The FAULT button is a momentary contact switch. When pushed the first time, it causes the
drive to enter an offline state (relative to the controller) and to assume control of all front
panel indicator lights in order to display a blinking front panel fault code (Table 2-2). The
drive stays offline as long as the fault code is displayed and the lights are blinking. When
the FAULT switch is pushed a second time, the drive tries to clear the condition, enters
the available operating state (assuming a port switch is pushed), and returns the front-panel
indicators to their normal service.

Front panel fault codes show general fault conditions. Only the most recent or most severe
fault codes can be read through the front panel. The LED hexadecimal error codes displayed
on the hybrid module (Figure 1-2) show specific error conditions. The error codes are

stored in drive memory as the error conditions are cleared. The 16 most recent error codes
are stored in the drive internal error silo for use in troubleshooting the drive. Appendix A
lists the hybrid LED error codes and associated drive conditions. Error condition hex codes
are sent to the controller/host error log. Table 2-2 gives an explanation of the error condition
hex codes that are logged in the controller/host error log.
The FAULT indicator is also used for a lamp test. When held in (after hardcore test sequence
is completed), all operator control panel lights should illuminate. When released, all lights
return to the condition of the drive (last known state or fault code).

2—4

OPERATING INSTRUCTIONS

Table 2-2

RAB82 Front Panel Fault Identification

RUN/

WRITE

Hex

STOP

FAULT READY PROT

Codex

Error Condition

—

Spindle error

—

Hybrid fault

—

0OC

SDI error

—

Master/slave error

—

Servo fine positioning error

—

Servo coarse positioning error

—

Spindle motor interlock error

Servo or HDA overtemp error

—

Read/write unsafe error

—

Read/write command error

—

Servo-HDA-R/W interlock error

—

Hybrid-servo interlock error

—

Hybrid-R/W interlock error

—

Hybrid-OCP interlock error

—

DC low

—

Index error

—

Write and bad embedded servo

—

Drive disabled by DD bit

—

Write and write protect

—

Servo diagnostics failed

—

Read/write diagnostics failed

—

Idle diagnostics failed

Power-up diagnostics failed

* This hex code represents the code that appears in error log information for drive status
byte 15. This hex code is not displayed by the front panel indicator lights.
*% The dc low condition prevents code transmission (o the controller and, therefore, does not

have a hexadecimal code representation for host diagnostic or error logging output.

OPERATING INSTRUCTIONS

2-5

2.1.3 READY Plug and Indicator

The numbered plastic cap over the READY indicator lamp serves as a unit address plug;
it does not contain a switch. The plastic tabs on the rear of this cap provide a binary code
which identifies one drive unit from another in multidrive arrangements. See Figure 2-2.

The binary or unit code corresponds to the drive number when plugged into the mating camcoded switch located behind the READY indicator light. Drive selection is accomplished
when the address on the drive select lines matches the code established by the switch cover
(Figure 2-3).

The READY indicator lights following a successful (fault-free) spin-up sequence, indicating
the drive is up to speed and ready to receive READ/WRITE or SEEK commands. The
READY indicator only comes on when the RUN/STOP switch is in the RUN position and
the RUN light is on. The READY indicator goes out during seek operations.
NOTE

If both port-select switches (A and B) are placed in the OUT position while the READY
indicator is on, the READY indicator goes off. The drive automatically goes into an
internal idle loop test sequence any time both port switches are out. During this time,
the drive is not ready and the indicator goes on and off intermittently while this self
test is being executed.

LOCATOR
PIN
16

REAR PIN CONFIGURATION
CX-552A

Figure 2-2

Drive Unit Address Plug (Ready Cap)

2.1.4 WRITE PROTect Switch and Indicator

The WRITE PROTect switch is a double-action push button with a built-in indicator light.
Pushing IN on this switch places the drive in the write-protect mode and turns on the
indicator light. While in the write-protect mode, the drive firmware and logic blocks
WRITE-DATA-OPERATION commands. Releasing the push button (OUT) enables the
write circuits and turns off the WRITE PROT indicator light.

2—6

OPERATING INSTRUCTIONS

-A

FAULT

— /

WRITE

PROT

;

|
t

‘

‘ \

’

READY INDICATOR LAMP

AND MICROSWITCH CONTACTS

Figure 2-3

2.1.5

—_ /

—

—_

—~ READY

o CODED
-

SWITCH AP

CX—1003A

Cam-Coded Switch Cover

Port Select Switches

The RAS82 disk drive has two port select push button double-action switches (A and B) with
built-in lights. When pushed, these switches light to indicate the port through which the

drive is being accessed by the controller. If both port switches are pushed in, either port can
be accessed by the controller, though not at the same time. The following three modes can
then be selected with the A and B port-select switches:

Port A operation only

Port B operation only

Port A/B (programmable) operation

NOTE

Pushing the port A or B switch does not put the chosen port on line, but only enables
that port to the controller. The port is on line when (1) the port switch is in and (2) the
controller accesses the port.
Also, both port select switches must be OUT to run internal drive diagnostics.

OPERATING INSTRUCTIONS

2.2

2-7

REAR POWER CONTROLS

Power control switches are located on the rear of the cabinet power controller and on the
rear of the individual disk drives. To gain access to these controls, open the rear door of the
cabinet.

The two basic controls on the power controller are the circuit breaker and the Bus/Off/On

switch. Refer to Figure 2—4 for four-high (60-inch) cabinets and Figure 2-5 for three-high
(40-inch) cabinets. The following paragraphs give the function of each.
NOTE
Always spin down the disk (spindle completely stopped) before switching off the disk
drive or power controller circuit breaker. If the disk does not spin down after releasing
the RUN/STOP switch, contact field service.

2.2.1

Power Controller Circuit Breaker

The power controller circuit breaker controls the ac power to all the ac circuits in the power

controller and provides overload protection for the output receptacles. (The 881 power

controller in the four-high cabinet has SWITCHED receptacles only.) The power controller
circuit breaker must be in the ON position to draw power from any of its ac outlets.

2.2.2

Bus/Off/On Switch (881 Power Controller)

The 881 power controller rear panel contains a three-position Bus/Off/On switch
(Figure 2—4.) This switch controls ac power to the nine ac outlets and selects remote

operation. When the circuit breaker to the power controller is ON, the following conditions
apply: the ac outlets are energized when the Bus/Off/On switch is in the ON position and
not energized when the Bus/Off/On switch is in the OFF position.

The BUS position of the Bus/Off/On switch is intended for remote sensing of DIGITAL

power control bus instructions. This position requires the use of a remote sensing cable
shipped with the power controller. If you don’t have this cable, or your application does not
require the use of the DIGITAL power control bus, leave the switch in the ON position.
NOTE

Some power controllers (other than the 881), have a LOCAL/REMOTE switch. This
switch only controls the power to ac outlets marked SWITCHED. The REMOTE
position is intended for remote sensing of a keyswitch on a CPU cabinet. This feature
enables the power controller to be turned on when the CPU is turned on and requires
the use of a remote sensing cable.
For more detailed information on the 881 power controller, refer to the 881 Power Controller

User Guide (DIGITAL Order Number EK-881PC-UG). Refer to Figure 2-6 for plug

designations and information.
NOTE
The three-high, 40-inch cabinet, uses the 874 power controller.

2—8

OPERATING INSTRUCTIONS

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;||

DISK DRIVE

POWER CORD

E‘

EAN — °
°

: \DRIVE

POWER
CONTROLLER ~—__|

RECEPTACLE

CIRCUIT

BREAKER

[

——sD|

INTERFACE

BRACKET

FUSE

POWER CONTROL

LABEL

L 7 YV

BUS CONNECTORS

UNDELA

CIRCUIT

BREAKER

(P G

) ®

®
—m

:JH

[ooaf] 412
N

—

)

.. .

SSSEAMETED
OPENING

[0 09[] J13

DELAYED

(0.5 SEC)

C(t)Bu

POWER CORD

STRAIN RELIEF
/

FUSE

ST11

SERIAL/LOGO

LABEL

0 7]
POWER

BUS/OFF/ON SWITCH

(CLOCKWISE FROM TOP)
CX—1004A

Figure 2-4

Rear Cabinet Power Controls (Four-High)

OPERATING INSTRUCTIONS

__DISK DRIVE
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_ /J\\\

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| ~oriCIRCUIT

;
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CONTROLLER —_{ |*

;

O||=" 2| | =k
il

POWER CONTROLLER

| ——sbI
INTERFACE
BRACKET

POWER

LAMP

CIRCUIT BREAKER
‘

BREAKER

POWER

POWER CORD
RECEPTACLE

Od—7:
;j
L

feel00l
: ((x/>>

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[

©oe | O

POWER
E

LOCAL/REMOTE

SWITCH

OPENING

Figure 2-5

CX—-1027A

Rear Cabinet Power Controls (Three-High)

2-9

2—10

OPERATING INSTRUCTIONS

POWER CORDS GOING TO POWER CONTROLLER (FROM REAR OF ENCLOSURE)

120V 60HZ
POWER CORD

DEC NO. A-PS-1700083-23

240V 50HZ
POWER CORD
DEC NO. A-PS-1700083-24

120/240V 47-63HZ
10A/6A
POWER CORD

DEC NO. A-PS-1700442-18 OR
A-PS-1700442-19

USED WITH 881 POWER CONTROLLER

PLUGS GOING TO WALL OUTLET (FROM CONTROLLER)
/

120V 60HZ

30A

1-PHASE

THREE-HIGH
CABINET

—
\

NEMA NO. L5-30P

DEC NO. 12-11193

4———'"J

240V 50HZ

20A

f =

USED WITH H874B POWER CONTROLLER

1-PHASE

NEMA NO. L6-20P
DEC NO. 12-11192

120/208Vv AC 60HZ
30A
3-PHASE

5-WIRE

WYE

NEMA NO. L21-30P

USED WITH 881-A AND 881POWER CONTROLLERS
FOUR-HIGH

CABINET

220-240/380-415V AC 50HZ
20A OR 16A
3-PHASE
WYE

USED WITH 881-B

5-WIRE, 4-POLE,
IEC 309

POWER CONTROLLERS

CX—-1872A

Figure 2-6

Electrical Plug Configurations

OPERATING INSTRUCTIONS

2.2.3

2-11

Disk Drive Circuit Breakers

A circuit breaker, located on the rear panel of each disk drive, controls the ac power to the
drive dc power supply, the cooling fans, and the spindle motor. This circuit breaker and
the power controller circuit breaker must be in the ON position before the drive will spin
up. See Figure 2—4 for four-high (60-inch) cabinets and Figure 2-5 for three-high (40-inch)
cabinets.

2.3

DRIVE OPERATION

This section contains operating instructions for the RA82 disk drive. Before operating, the
drive must be properly installed and checked out by a qualified field service engineer.
NOTE

Make sure all drive and logic fans are working every time the drive is turned on.
These cooling fans must be working to operate this equipment. Refer to Figure 2-4
for four-high cabinets or Figure 2—-5 for three-high cabinets and Figure 2-7 for fan
locations.

2.3.1

Spin Up

Push the RUN/STOP button (IN position) on the drive front panel to spin up the drive. The
RUN indicator lights, and the READY indicator lights as soon as the drive completes the

spin-up cycle and passes the initialization tests. If the initialization tests fail, the FAULT

light on the operator control panel lights. See Section 2.1.2 to determine the cause of the
problem.

CAUTION
To prevent HDA and head damage, never open or close the upper chassis assembly
while the drive is operating.
For optimum drive performance, leave the RA82 disk drive on and spinning as much as
possible. Do not power off the disk drive unless absolutely necessary.

2.3.2 Spin Down
Release the RUN/STOP switch (OUT position) on the drive front panel to spin down the
drive.

The READY and the RUN indicators go off when disk rotation stops.

If the disk does not spin down after releasing the RUN/STOP switch, contact field service.
CAUTION

For optimum drive performance, do not power off or spin down the RA82 disk drive
unless absolutely necessary.

2—12

OPERATING INSTRUCTIONS

HDA

READ/WRITE
MODULE

READ/WRITE CABLE
(NOTE ROUTING)

EAN (TWO ON

POWER SUPPLY)
-

CABLE

SPRING
ASSEMBLY

POSITIONER

LOCK LEVER
PREAMP
MODULE
HDA

RETAINING

NUTS (4)

Figure 2-7

2.3.3

CX—1000A

HDA and Drive Details

Drive Power Removal

Spin down the drive, as described above. When the RUN indicator is off, turn off the drive

circuit breaker on the back panel (Figure 2—4 or Figure 2-5) and disconnect the cord to the
power controller. This removes power to the drive.
CAUTION
Do not use the disk drive or power controller circuit breaker to stop the drive.

Always spin down the disk (spindle completely stopped) before switching off the disk
drive or }mwer controller circuit breaker. If the disk does not spin down after releasing
the RUN/STOP switch, contact field service.

OPERATING INSTRUCTIONS

2-13

CUSTOMER CARE

2.4

Inspect the air filter in the chassis assembly monthly and clean, if necessary.

2.4.1

Air Filter Removal

Remove the air filter as follows:

While gently pushing the release latch under the operator control panel, pull down the
access door on the front bezel of the drive to reveal the air filter. Refer to Figure 2-8.

OPERATOR

RELEASE
LATCH

CONTROL
-~ PANEL

FRONT

BEZEL

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FILTER

ACCESS

DOOR

Figure 2-8

CX—1005A

Air Filter Removal

CAUTION

To prevent damage to the hinge mechanism, do not lean on or place tools near the
open access door.

Carefully pull the filter material outward until it is free of the bezel.

2-14

OPERATING INSTRUCTIONS

2.4.2 Cleaning
1.

Gently wash the filter in warm water using a mild detergent.

Gently rinse with clear water.

Allow the filter to completely dry before reinstalling in the drive.

2.4.3

Air Filter Replacement

Slide the clean, dry filter into place inside the bezel.

Close the access door by swinging it up into the front bezel until the release latch snaps
into place. Make sure the access door is secured in place by the release latch. Refer to

Figure 2-8.

NOTE
Order a replacement filter under DIGITAL Part Number 74-29721-01.

3
INSTALLING THE RA82 DISK DRIVE
3.1

INTRODUCTION

This chapter provides installation procedures for the RA82 disk drive and includes notable
features, specifications, and cable options. This chapter also includes an introduction to drive
cabling.

If you have received a four-high cabinet filled with RA82s or if you have received a cabinet
~ as part of a system configuration, then read this entire chapter for installation procedures.
If you are installing an RA82 as an add-on to an existing cabinet, refer to Chapter 4 for a
three-high (40 inch) cabinets, and Chapter 5 for four-high (60 inch) cabinets.
If the system to be installed is an SA configuration, you have been directed here by the

Storage Array Configuration Guide. Refer to Chapter 6 for installation instructions.
NOTE
Cabinet unpacking instructions are not covered in this document but can be found in
the H9646-AH/AJ Cabinet System User Guide (DIGITAL Order Number EK-H9646-UG)
included with every four-high cabinet.

3.2

SITE PREPARATION AND PLANNING

A certain amount of preparation and planning is necessary before installing the RA82 disk
drive. The following paragraphs discuss some points to consider.

3.2.1

Environmental Considerations

The RAS82 disk drive is designed to operate in a business or light industrial environment.
Temperature, humidity, and altitude limits must be considered before the drive is installed.
Refer to Table I-1 for environmental specifications.
CAUTION
RAS82 disk drives in any storage array must be thermally stabilized in the site
environment a minimum of 24 hours before operation. Failure to thermally stabilize
the RA82 disk drive could result in damage to the disk drive media or electronics upon
powerup.

3.2.2 Cleanliness
The RAB2 sealed HDA minimizes the risk of dust particles entering the area where the
recording media is located. However, for maximum reliability and optimum performance,

operate the equipment in the cleanest environment possible.

3—-2

INSTALLING THE RA82 DISK DRIVE

Floor Loading
The weight of one four-high cabinet filled with RA82 disk drives is approximately 408
kilograms (850 pounds). The weight of each additional add-on RA82 is approximately 61.2
kilograms (135 pounds).

The four-high cabinet does not place any abnormal stress on a raised computer room floor.
However, consider the weight of existing equipment before installing additional cabinets.

3.2.4

Heat Dissipation

The heat dissipation of each RA82 may reach approximately 644 watts (nominal) at 120 V,
60 Hz. Compute approximate cooling requirements for the complete system by multiplying

this figure by the number of drives and adding the heat dissipation figures of the other
system components. Adjust the total figure to allow for cooling system efficiency.

d Safety Precautions
The RAS82Z does not present any unusual fire or safety hazards to other computer equipment.
However, check the ac power wiring in the computer system to determine adequate capacity

for future expansion.

Hazardous voltages are present inside this equipment. Bodily injury or equipment

damage may result from incorrect servicing. Installation and servicing must be
performed by a qualified service person.

To prevent damage to equipment and possible personal injury, verify all power sources to

make sure they are the exact voltage and frequency required for this equipment.

RA82 disk drive and power controller must be the same voltage and frequency.
For example, a 120 V, 60 Hz drive must have a 120 V, 60 Hz power controller; a 240 V,
50 Hz drive must have a 240 V, 50 Hz power controller.

Figure 3—1 shows the ac plug configurations for the four-high cabinet and the 881 power

controller.

NG THE LEVELER FEET
Use the following procedure to adjust the leveler feet after the cabinet has been moved
to its final location. See the H9646-AH/AJ Cabinet System User Guide for more detailed
instructions.
1.

Turn the leveler hex nut downward until the leveler feet make solid contact with the

floor (Figure 3-2).
2.

Repeat for each of the four leveler feet until the drive cabinet is level and the load is
removed from the casters.

CAUTION
Extend the leveler feet far enough to carry the load of the cabinet, allowing the casters
to spin freely. If not, damage to the casters may result over an extended period of time.

INSTALLING THE RA82 DISK DRIVE

3-3

POWER CORDS GOING TO POWER CONTROLLER (FROM REAR OF ENCLOSURE)
120V 60HZ

POWER CORD

DEC NO. A-PS-1700083-23

240V 50HZ

POWER CORD
DEC NO. A-PS-1700083-24

120/240V 47-63HZ

10A/6A
POWER CORD

DEC NO. A-PS-1700442-18 OR
A-PS-1700442-19

USED WITH 881 POWER CONTROLLER

PLUGS GOING TO WALL OUTLET (FROM CONTROLLER)
/‘

120V 60HZ
30A

1-PHASE

THREE-HIGH

CABINET

NEMA NO. L5-30P
DEC NO. 12-11193

<
240V b0HZ
20A
1-PHASE

NEMA NO. L6-20P

USED WITH H874B POWER CONTROLLER

DEC NO. 12-11192

120/208V AC 60HZ
30A
3-PHASE

5-WIRE

WYE

NEMA NO. L21-30P

USED WITH 881-A AND 881-C
POWER CONTROLLERS

FOUR-HIGH
CABINET

220-240/380-415V AC 50HZ
20A OR 16A

3-PHASE
WYE

USED WITH 881-B |

5-WIRE, 4-POLE,

IEC 309

POWER CONTROLLERS

CX—-1872A

Figure 3-1

Power Connector Configurations

3—-6

[INSTALLING THE RA82 DISK DRIVE

LATCH

RELEASE

Y77

BUTTONS

SUPPORT
BRACKET

REAR
D

Figure 3—-4

3.6

OOR

CX—689A
,

Removing the Rear Door

CABINET INTERLOCK (If Applicable)

The cabinet interlock and the drive actuator assemblies maintain cabinet stability and
ensure operator safety. If the stabilizer foot is retracted, all drives are locked and cannot be

extended on the slides. When the stabilizer foot is extended, the cabinet interlock mechanism
allows only one drive at a time (0 be extended.

The drive actuator assembly works in conjunction with the cabinet interlock mechanism to
maintain cabinet stability. Refer to Figure 3-5.

INSTALLING THE RA82 DISK DRIVE

3—7

DRIVE
LEFT

—
SIDE

- SLIDE
MOUNTING
RAIL

DRIVE

ACTUATOR

RIVET
Figure 3-5

3.7

CX—-692A

RA82 Actuator Assembly

EXTENDING AND RETRACTING THE DRIVE ON SLIDES

The following sections describe the procedure for extending and retracting disk drives on the
cabinet slides.
|
CAUTION

To prevent damage to HDA or heads, never extend or retract the cabinet slides while a
disk drive is operating. Spin down and completely stop the drive before moving it on
the cabinet slides.

3.7.1

Extending the RA82 Disk Drive Using the Slides

Perform the following steps to extend the RA82 disk drive.
1.

Pull out the cabinet stabilizer. Refer to Section 3.4.

Remove the back door of the cabinet. Refer to Section 3.5.

Remove the screws that hold the back of the disk drive to the electrostatic discharge
(ESD) brackets. Refer to Figure 3-6.

Pull the drive out until the slides lock in place. Refer to Figure 3-7.

3-10

INSTALLING THE RA82 DISK DRIVE

ALLIGATOR

CLIP

GROUNDING

ESD WRIST

"//;/

STRAP

DRIVE

v//f\

/’%

NN
X2

)
£3

77N

GROUNDING

/:'\/

\/%

CORD

G
(>
\4(’/ ol

N
\.\“.7
N \\\\’/

CX—993A

Figure 3-8

Connecting ESD Wrist Strap to Ground

Extend a drive out of the cabinet on its slides (Section 3.7).

For all drives:

Unlock the upper chassis assembly by turning the two cam latches under the front bezel
180 degrees counterclockwise with a 5/16-inch allen hex wrench. Refer to Figure 3-9.

2. Raise the upper chassis assembly until the damper (gas spring) lock slides in place and
the cover is supported by the damper (Figure 3-10).
CAUTION

To prevent HDA and head damage, never open or close the upper chassis assembly

while the drive is operating.

3. Locate the three red shipping brackets that fasten the HDA to its mountings. Refer to
Figure 3—11.

INSTALLING THE RA82 DISK DRIVE

3-11

LIFT UP

FROM

BOTTOM

CAM LATCHES

5/16 ALLEN HEX
FRONT

5 EZE Figure 3-9

Upper Chassis Assembly

CX-997A

INSTALLING THE RA82 DISK DRIVE

3—14

HDA

READ/WRITE
MODULE

READ/WRITE CABLE

(NOTE ROUTING)
FAN (TWO ON

POWER SUPPLY)
CABLE

SPRING
ASSEMBLY

POSITIONER

LOCK LEVER

PREAMP

MODULE
HDA

RETAINING

NUTS (4)

Figure 3—12

:
CX—-1000A

HDA Details

Firmly tighten all four HDA retaining nuts with a 7/16-inch nut driver. Refer to
Figure 3—12.

Ensure the cable spring assembly is in the ENGAGED position as shown in
Figure 3-13.
NOTE

An interlock switch prevents the spindle motor from operating while the cable
spring assembly tension is released. The cable spring assembly must be in the

ENGAGED position for spinup.

Remove the positioner lock seal and place the positioner lock lever on the HDA in the
UNLOCK position (Figure 3—11).

INSTALLING THE RA82 DISK DRIVE

3-15

CABLE
SPRING
ASSEMBLY

(STORED POSITION)

CX—-1001A

Figure 3—13

Cable Spring Assembly

10. Unlock the logic access cover by manually turning the two captive fastener assembly

screws several turns counterclockwise. Release and tighten these screws by hand only.
Refer to Figure 3-14.

11. Fold out the logic access cover.

3-16

INSTALLING THE RA82 DISK DRIVE

12. Check all modules, cables, and connections. Make sure all cable connectors are firmly
seated in the mating connectors.
NOTE
Visually inspect all modules and components for obvious damage. Do not operate
equipment if components are damaged. Report all damage to the DIGITAL field

service or sales office and to the delivery agent.

13. Return the logic access cover to its original closed position. Lock the two captive
fastener assembly screws by manually turning them clockwise. Make sure the logic
access cover is securely locked in place. Refer to Figure 3—14.

14. Position the read/write cable between the ribs on the HDA to ensure that the cable is not
pinched when the cover is closed. Refer to Figure 3—12.

CAUTION
Do not pinch cables when lowering the upper chassis assembly. Check cable
locations and reroute cables, if necessary, before lowering.
15. Gently lift up on the upper chassis assembly to take the weight off of the gas spring.

Unlock the gas spring by pulling the locking knob out while still supporting the weight
of the upper chassis assembly. Refer to Figure 3-10.

16. Slowly lower the upper chassis assembly until resistance from the gas spring is felt.

When resistance is sufficient to ensure the gas spring will allow the logic to close
slowly, release your hold on the upper chassis assembly. Lock in place by turning the

two cam latches under the front bezel 180 degrees clockwise with a 5/16-inch allen hex

wrench. Refer to Figure 3-9.
CAUTION

DO NOT permit the upper chassis to free fall and DO NOT force the upper chassis

assembly against the gas spring pressure.

For drives mounted in a cabinet:
1.

Slide the drive back into the cabinet. Refer to Section 3.7.

Repeat the above procedures for all drives in the cabinet.

3.9

SDI CABLES (DESCRIPTION)

A four-high cabinet subsystem consists of an SDI (Standard Disk Interconnect) disk

controller and four RA82 disk drives. Like all RA-series disk drives, the RA82 is connected

directly to the disk controller via an external SDI cable. If the RA drive is operated in dual

port mode, then two SDI cables are used: one to each disk controller.

These external SDI cables plug into the I/O bulkhead assembly at the rear base of the
cabinet. External SDI cables must be installed for each drive in the cabinet between the I/O
bulkhead in the CPU or controller cabinet and, in the four-high cabinet, the SDI interface

bracket (Figure 3—15). The controller connector should already be installed. If not, refer to
the installation procedure in the appropriate disk drive controller user guide.

NOTE
In the four-high cabinet, external SDI cables are connected to the inside of the SDI
interface bracket. The infernal SDI cables exit from the back of the drive and connect
to the outside of the SDI interface bracket (Figure 3-15).

INSTALLING THE RA82 DISK DRIVE

3-17

CAPTIVE
SCREWS

-———— LOGIC

ACCESS

COVER

SERVO
MODULE

CLOSED VIEW

OPEN VIEW

CX—-1002A

Figure 3-14

Opening the Logic Access Cover

3—-18

INSTALLING THE RA82 DISK DRIVE

I/0 BULKHEAD
FOR DRIVE 1

SDI INTERFACE
"BRACKET

/0 BULKHEAD

1/0 BULKHEAD
FOR DRIVE O

EXTERNAL
SDI CABLE

FOR DRIVE 3

" INTERNAL

CONNECTIONS

/0 BULKHEAD /'\L.
FOR DRIVE 2

SDI CABLES

CAPTIVE

.
CAPTIVE

CABLE

MOUNTING

(1TM

SCREWS

TERMINATORS

MOUNTING

SCREWS

Figure 3-15

CX-685C

/O Bulkhead Mounting

Each drive is shipped with a 12-foot SDI cable for external connection to the drive controller.
A second 12-foot SDI cableis required for dual-port operation. In situations requiring more
distance between the drive cabinet and the disk controller, other SDI cable lengths are
available as shownin Table 3-1.
Table 3—-1

SDI Cable Options

Part No.

Description

BC26V-6D

Six foot four inch SDI cable

BC26V-12

Twelve foot SDI cable

BC26V-25

Twenty-five foot SDI cable

BC26V-50

Fifty foot SDI cable

BC26V-80

Eighty foot SDI cable

Use the following procedure to install the external SDI cables to the drive cabinet. For

internal SDI cabling information, add-on drive information, and associated cabling, refer to
Chapter 4 for three high cabinets and Chapter 5 for four high cabinets.

INSTALLING THE RAS82 DISK DRIVE

3.10

3-19

EXTERNAL SDI CABLING PROCEDURE (FOUR-HIGH

CABINET)

Refer to Figure 3—-15 during the following installation procedure.
1.

Remove the rear door of the cabinet (Section 3.5).

Plug the external SDI cable from the disk controller into the port A connector on the I/O
bulkhead. Note the orientation key on the SDI cable.
NOTE

To orient the connections properly for external and internal cables, turn the I/O

bulkheads on the left side of the SDI interface bracket 180 degrees from those on
the right side. This should be apparent when the screw holes are aligned.

If a second disk controller is used, mount its SDI cable into the port B connector on the
I/O bulkhead. Note the orientation key on the SDI cable.
CAUTION
Ensure no pins are bent during assembly.

Tighten the two captive screws on the SDI cable shield terminators to the I/O bulkhead.
Do not over tighten (10 inch-pound maximum).

Repeat the above cabling procedure for all drives in the cabinet.

Reinstall the rear door of the cabinet (Section 3.5).

3.11

SEQUENCE CABLES (DESCRIPTION)

Drive sequence cables are installed to guarantee only one RA82 disk drive at a time starts
a spin-up cycle. Sequence cables are used on drives with nonremovable media such as the
RAS8X-series disk drives (RA80, RA81, and RAS82).
The drive sequence cables inside the cabinet connect the drives in a series chain. These
cables may also be external to the disk cabinet to connect the series chain in one cabinet
with another in a second cabinet. When a large distance exists between drive cabinets,
longer lengths of drive sequence cables may be required. Refer to Table 3-2 for a list of
these optional lengths.
CAUTION

Sequence cables must be installed or disk/data corruption or damage may result during

or after a system power failure.

3-20

INSTALLING THE RA82 DISK DRIVE

Table 3-2

Drive Sequence Cable Options

Part No.

Description

70-19690-06

Six foot drive sequence cable

70-19690-08

Eight foot drive sequence cable

70-19690-12

Twelve foot drive sequence cable

70-19690-25

Twenty—fivé foot drive sequence cable

70-19690-50

Fifty foot drive sequence cable

70-19690-80

Eighty foot drive sequence cable

For detailed four-high cabinet sequence cabling informat

ion, refer to Chapter 5.

3.12

PROGRAMMING THE UNIT ADDRESS PLUG

The READY switch cap on the operator control panel

is also the drive unit address plug. A
drive unit number between 0 and 254 (decimal) must be program
med into this plug.

A new switch cover is set as unit 0. To set a drive unit
number other than 0, remove the
READY switch cap from the control panel and cut off the
tabs that add up to the required
number. Add the tabs according to the binary values shown
in Figure 3-16. For example, if
unit number 7 is required for a specific drive, cut tabs 1,
2, and 4 off the switch cap. If unit
number 113 is required, remove tabs 64, 32, 16, and 1.
Leave all tabs on if unit number 0 is
required.

NOTE

Do not use the same unit number for two drives on the same

controller.

After selecting the drive unit number, place the gummed label

number in the recessed area on the front of the switch cap.

with the corresponding
Then replace the switch cap on

the operator control panel. For more information on the READY
plug and indicator, see
Section 2.1.3.

3.13

RA82 DRIVE DIAGNOSTIC CHECKOUT

The following paragraphs describe how to run the RA82 drive-res
ident diagnostics using the
diagnostic terminal and how to verify the proper operation
of each RAS82 disk drive after
installation.
NOTE
RAS82 disk drive checkout must be performed by trained field

service personnel only.

INSTALLING THE RA82 DISK DRIVE

3-21

LOCATOR
PIN
16
REAR PIN CONFIGURATION
CX—-552A

Figure 3-16

3.13.1

Drive Unit address Plug (Ready Cap)

The Diagnostic Terminal

A field service hand-held diagnostic terminal used to communicate with the RAS82 is stocked

with every spares kit. The diagnostic terminal uses a standard ASCII keyboard and an
RS232 interface. The RS232 connector for the diagnostic terminal is located inside of the

front bezel filter door.

Instructions on how to use the hand-held terminal are in the DSA Hand Held Terminal User
Guide (DIGITAL Order Number EK-DSAHH-UG). Any EIA-compatible terminal (with
null modem cable) set at 300 baud can be used to communicate with the drive to run the

diagnostic tests.

3.13.2 Applying Power to the Drive
Use the following procedure to apply power to the RA82 disk drive.
CAUTION
RAB82 disk drives in any storage array must be thermally stabilized a minimum of 24
hours in the site environment before operation. Failure to thermally stabilize the RA82

could result in damage to the disk drive media or electronics upon powerup.
1.

Verify the ac circuit breakers on the power control unit and each disk drive are in the

OFF position. Refer to Figure 3—17 for four high (60 inch) cabinets or Figure 3-18 for

three high (40 inch) cabinets.
2.

Plug the disk drive power cord between the drive and the power controller into the
receptacle on the power control unit at the bottom of the cabinet.
WARNING

The power cord between the drive and the power controller (disk drive power cord)
in the four-high cabinet is the same for hoth 120 V, 60 Hz and 240 V, 50 Hz. To
prevent damage to equipment and possible personal injury, verify both the disk

drive and the power controller in the four-high cabinet are the same voltage and

3—22

INSTALLING THE RA82 D ISK DRIVE

?m@mmy \ 120 V, 60 Hz drive must have a 120 V, 60 Hz power controller; a 240
m@ must have a 240 V, 50 Hz power controller.

Switch the ac circuit breaker on the power control unit to the ON position. Refer to
Figure 3—17 for four high (60 inch) cabinets or Figure 3—18 for three high (40 inch)
cabinets.

isk Drive Operation
Use the following procedure to verify disk drive operation.
CAUTION

For drive|mfiwfiem, use a grounded (electrostatic discharge) wrist strap during the
following procedures (Figure 3-8). Also, read Section 1.7 for information on ESD
protection,

Unlock the upper disk drive chassis assembly by turning the two cam latches under the
front bezel 180 degrees counterclockwise with a 3/16-inch allen hex wrench. Refer to
Figure 3-9.

Raise the upper chassis assembly until the damper lock slides in place and the chassis is
supported by the damper (Figure 3—10).

Unlock the logic access cover by manually turning the two captive fastener assembly
screws several turns counterclockwise. (Release and tighten these screws by hand only.)
Refer to Figure 3-14.

TFold out the logic access cover (Figure 3—14).

Check that all module and cable connectors are firmly seated. Also, visually inspect all
modules and components for obvious damage. Do not operate equipment if components
are damaged.

Swiich the ac circuit breaker on the back of the disk drive to the ON (up) position. This
acfifiwies the internal disk drive diagnostics (hardcore test sequence) and all front panel
indicator lights. When the drive successfully passes the diagnostics, the front panel
lights will go off (3 or 4 seconds).
CAUTION

Make sure the drive and logic fans are working every time the drive is turned

on. These cooling fans must be working to operate this equipment. Refer to
Figure 3-17 m@ %“@W hsgh (60 inch) cabinets or Figure 3-18 for three high (40 inch)
cabinets, andFigure 3-12 for fan locations.

If an error occurs, press and release the FAULT switch/indicator on the operator control
panel (o display the drive condition fault codes indicated by fault lights on the front
panel. See Section 2.1.2 for additional information on the FAULT switch and indicator.

As a front panel lamp test, depress and hold the FAULT switch of the RA82 OCP after
the hardcore test sequence. All front panel lights should light.

nort select switches (A and B) are placed in the QOUT position while the
indicator is on, the READY indicator goes off. The drive automatically
gw@ mm an internal idle loop test sequence any time both port switches are
out. During this time, the drive is not ready, and the indicator goes on and off
fimwmfifimfiy while this self test is being executed.
READY

Both port select switches must be OUT to run internal drive diagnostics.

3-23

Tl
=

INSTALLING THE RA82 DISK DRIVE

IHIIIIIHHIIIIIHIIIIII

Q
[+]
[+]

[«

[+]

[o]
[«]

[o]

[

POWER

°
[o]

[:+]

A\ 4

CONTROLLER ~—___|

F-rt

[F.QOOOOOOOOOOOOOOOOOOOO

FAN

00 0OO0ODOOOCOO©OOOOOOOO0O0OOOo

o ((((( 7 .))))))

_____—DISK DRIVE
POWER CORD
RECEPTACLE

T~ pRIvE

CIRCUIT
BREAKER

)

Ihnd

INTERFACE
BRACKET

FUSE

//
UNDELAtji/
LABEL

POWER CONTROL
BUS CONNECTORS

IlliiJ1O

]}

J11
[lood[]

[flooo[] J12
JO009]] J13

BREAKER

]
©®

POWER CORD

STRAIN RELIEF
/

10
®

Pirnilie

FUSE

GROMMETED
CORD

OPENING

DELAYED

SERIAL/LOGO

POWER

(0.5 SEC)

LABEL

CORD

BUS/OFF/ON SWITCH

(CLOCKWISE FROM TOP)
CX—-1004A

Figure 3-17

Rear Cabinet Power Controls (60-Inch Cabinets)

3—26

INSTALLING THE RA82 DISK DRIVE

17110

0111

@980

OGO
O

HEXADECIMAL E7

/
LEDS

HYBRID/
MICROPROCESSOR

MODULE

\“\\q

POWER SUPPLY

J'\

\ SERVO

MODULE

READ/WRITE
MODULE

/
//

HDA FEET

Figure 3-19

——

HDA

PREAMP/ /

MODULE

Hinged Circuit Module Arrangement

CX—985A

INSTALLING THE RA82 DISK DRIVE

RS232

DIAGNQOSTIC

3-27

DRIVE

TERMINAL

SERIAL

CONNECTOR

NUMBER

HAND-HELD

TERMINAL

o . ..Pl
RS232
ADAPTER

EIA

CONNECTOR

RELEASE
LATCH

CX—1006A

Figure 3-20

Diagnostic Terminal Connections

3-30

INSTALLING THE RA82 DISK DRIVE

CAPTIVE

SCREWS

[
——— LOGIC
ACCESS

COVER

SERVO
MODULE

/AN

CLOSED VIEW

< N\

OPEN VIEW

CX—1002A

Figure 3-21

Locking the Logic Access Cover

INSTALLING THE RA82 DISK DRIVE

3-31

FAN

HDA

READ/WRITE
MODULE

READ/WRITE CABLE
(NOTE ROUTING)

FAN (TWO ON

POWER SUPPLY)\
-

L—

CABLE

SPRING
ASSEMBLY

LOCK LEVER

POSITIONER

/
&

HDA

PREAMP

MODULE

HDA

RETAINING

NUTS

Figure 3-22

HDA Remcval

(4)

CX—1007A

4
INSTALLATION OF RA82 DISK DRIVES IN
THREE-HIGH CABINETS
4.1

INTRODUCTION

This chapter describes the installation of the RA82 disk drive in the 40-inch (three-high)
cabinet system. For a list of basic three-high cabinet specifications, refer to Table 4—1.
Table 4-1

Three-High Cabinet Specifications

Characteristic

Specification

Overall height

41.8 inches (106 cm)

Depth

36 inches (91.4 cm)

Width

21.3 in (54.2 cm)

Weight (empty)

52 1bs (23.5 kg)

Mounting width

19 inches (48.3 cm)

Mounting

STD EIA/RETMA

Cooling

Front to rear

Frame construction

All steel, riveted

Power cord length

14 feet

NOTE
For specific information and instructions on drives other than the RA82, refer to
the appropriate disk drive user guide and the H9642-JA/JB Installation Sheet, Order

Number EK-9642K-IN.

4.2

UNPACKING AND EXTERNAL INSPECTION (40-INCH
CABINET)

When delivered, the three-high cabinet containing the RA82 disk drives is packed in a
cardboard container attached to a shipping skid or pallet. Refer to Figure 4-1.

4—-2

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

COVER
|
|

L CARTON

= SHIPPING
STRAPS

CARTON CONTAINING

P
'

‘k//L/////UNLOADHMSRAMPS

POLY BAG

SHIPPING
BOLT

SHIPPING
BRACKET

CX—393D

Figure 4-1

Unpacking the 40-Inch Cabinet System

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4.2.1

4-3

Unpacking the System on a Shipping Pallet

Use the following procedure to unpack and remove the equipment from the pallet. Use
Figure 4-1 as a guide.

Cut the shipping straps with diagonal cutters.

Lift and remove the cover.

Remove the two unloading ramps packed in the box on top of the disk cabinet.

Remove the shipping carton and all associated packing materials.

Check the cabinet and associated eqmpment for any external shipping damage Report
any damage to the DIGITAL field service or sales office and to the local carrier.
NOTE
Keep all packing material and receipts in case a damage claim is filed.

Remove the four shipping bolts that fasten the drive cabinet to the pallet. Refer to the
inset in Figure 4-1.

Slide the four shipping brackets off the cabinet leveler feet.
Extend the loading ramps to their full length by connecting the two sections of each
ramp with the steel dowel (taped to the ramp). Refer to Figure 4-2.
Matching the arrows, attach the two unloading ramps to the pallet by fitting the tab of

each ramp board into the pre-drilled holes on the rear of the pallet deck (Figure 4-2).
10. Screw the cabinet leveler feet all the way up into the chassis by turning the lock nut

down until it makes contact with the leveler hex nut, and then turning the hex nut up
until it raises the leveler foot. The cabinet should now rest on the casters so that the

leveler feet will not touch the ramps (Figure 4-3).

CAUTION
Fully retract the leveler feet to prevent contact with the floor when the cabinet is
unloaded from the skid.
WARNING

|
|
Take extreme care durmg the following procedures. At least two people (preferably
three) must assist in the process of deskidding or taking the cabinet off the pallet.

The cabinet is top-heavy. Restrain it when you roll it from pallet onto the ramp.
When rolling it down the ramp, guide it and retard its motion.

11. Carefully roll the drive cabinet down the ramps.

12, Wheel the cabinet to its final location.
13. Adjust the leveler feet downward until they make solid contact with the floor. Adjust the
four leveler feet until the drive cabinet is level and stable. See Figure 4-3.

4.2.2

Removing the Internal Shipping Brackets and Packing Material

Remove the packing materials and shipping brackets inside the chassis of each disk drive
using the procedures described in Section 3.8.

4—4

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

LEFT
UNLOADING
RAMP

SHIPPING

PALLET

RIGHT RAMP

ATTACHES HERE

EXTEND RAMP TO

FULL LENGTH

Figure 4-2

4.2.3

Ramp Construction (40-Inch Cabinet)

Electrostatic Discharge (ESD) Brackets

The electrostatic discharge (ESD) brackets ground the disk drive to the cabinet.

CAUTION
This ESD ground connection must always be made before the drive is operated.

Use the following procedure and Figure 44 to secure the drives to the ESD brackets:
1.

Locate the ESD bracket holes on the rear of the drive.

Push the drive forward just enough to remove the bottom comner 1/4-inch hex screws

and washers on the power supply.
3.

Use the screws and washers just removed to secure the drive to the two ESD brackets.

The screws holding the ESD brackets must be removed to slide the drive forward. These
brackets must be reconnected each time the drive is pushed back into the cabinet.

CX-394C

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

LOCKNUT ——
LEVELER

HEX NUT

LEVELER

N u//f/k
=4

/AQ

@ ‘

T =

FOOT

CX—395C

Figure 4-3

4.3

Leveler Adjustments

OPENING AND REMOVING THE REAR DOOR

Refer to Figure 4-5 and Figure 4-6 when performing these procedures.
Open the rear door:
1.

Tumm the hex lock counterclockwise.

Pull open the rear door.

Remove the rear door:
1.

Open the rear door as described above.

Remove the ground wire attached to the bottom inside of the door.

Pull down on the latch in the top corner and lift the door off the lower bracket.

4.4

CABLING THE RA82 TOP DRIVE

Before proceeding with the cabling, open and remove the rear door of the cabinet as
described in Section 4.3.

4-5

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

Jo 0o 0o 0/0flfo © © © 0 06 06 0 0

ESD

BRACKET

e
®

POWER SUPPLY

SCREW AND WASHER

4-6

ESD BRACKET

RIGHT SIDE

Figure 4-4

4.4.1

CX—-995A

Electrostatic Discharge Bracket Details

Mounting the I/O Bulkhead Connectors

An I/O bulkhead connector must be installed on the SDI interface bracket at the back of the
drive cabinet for each add-on drive. Screw this assembly to the SDI interface bracket as
shown in Figure 4-7.

4.4.2 Instailing External SDI Cables
The external SDI cables coming from the central processing unit (CPU) are connected to the

I/O bulkhead assembly. Refer to Figure 4-7 and Figure 4-8 for cabling of the top drive.

4-7

——————

—/

————————
e

/——

11t
STt

FRETRRRRRE ]

TR Il o

111 T
S N\
R
M
| 11
I
Iil

’l,lMl iLl Il

SIDE PANEL

Fi gure 4-5

Opening the Rear Door

CX—923A

BACK
DOOR

@@7

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

I I | Il ||
]
il
|

4-8

GREEN AND
YELLOW
GROUND WIRE

CX-285A

Figure 4-6

Removing the Rear Door

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4-9

/O BULKHEAD
FOR DRIVE 1

SDI INTERFACE

BRACKET

/O BULKHEAD
FOR DRIVE 2

/0 BULKHEAD
FOR DRIVE O

EXTERNAL

SDI CABLE

INTERNAL

CONNECTIONS

SDI CABLES

CAPTIVE

MOUNTING

SCREWS
CAPTIVE

CABLE

SHIELD
TERMINATORS

MOUNTING

SCREWS

Figure 4-7

1/0O Bulkhead

CX-1021A

4-10

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

11/16 CABLE

VERTICAL

CLAMP

UPRIGHT

\ STANDOFF \
.

SEQUENCE

SDI CABLES ~ POWER CORD

‘

DISK DRIVE

PLUG

SPACER

Z
~

o
o

10-32 SCREW \

U-NUT

CABLE CLAMP

ESD BRACKET

\\\\\\\\\\\\\\

FLAT

CABLE

RETAINER

WASHER

TIE WRAPS

STANDOFF/

CABLE CLAMP

STANDOFF/ /

SDIINTERFACE
BRACKET

BULKHEAD

AC POWER CORD

Figure 4-8

o R

CABLE CLAMP

SDI Cables for the Top Drive

CX—-1022A

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4-—11

The external SDI cables must be installed between the I/O bulkhead in the CPU or controller
cabinet and all drive 1/O bulkhead connectors in the drive cabinet. The controller connector
should already be installed. If not, refer (o the appropriate controller user guide for
instructions on installing the SDI cables at the controller. Use the following procedure
to install the external SDI cables to the drive cabinet.

Unsc:1ew the two screws holding the I/O bulkhead connector to the SDI interface bracket

Remove the I/O bulkhead connector.

3. Plug the external SDI cable from the disk controller into port A connector on the

I/O bulkhead. Note the orientation key on the SDI cable. Refer to Figure 4-7 and

~ Figure 4-8.

If a second disk controller is used, mount its SDI cable into port B of the I/O bulkhead
connector. Note the orientation key on the SDI cable.
CAUTION

Ensure that no pins are bent during assembly.

Tighten the two captive screws on the SDI cable shield termmators to the I/O bulkhead
connector. Do not overtighten (10 in/lb maximum.)

Reconnect the I/O bulkhead connector to the SDI interface bracket.

Ti ghten the two captive screws on the I/O bulkhead connector. Do not overtighten (10
in/lb maximum).

Repeat the above cabling procedure for all drives in the cabinet.

NOTE

If more than one drive is mounted in the cabinet, additional cables must be installed.
Refer to Section 4.5 for instructions.

4.4.3 Installing Internal SDI Cables
The two internal SDI cables that exit from the back of the drive connect to the I/O bulkhead
connector (Figure 4-7). Use the following procedure to install the internal SDI cables to the
top drive:

Locate the port A SDI cable where it exits at the back of the disk drive. Plug the end of
the port A connector into the port A position on the I/O bulkhead connector. Note the
orientation key on the SDI cable.
CAUTION

Ensure that no pins are bent during assembly.

Tighten the two captive screws on the SDI cable shield terminator to the I/O bulkhead
connector. Do not overtighten 10 in/lb maximum.))

Repeat steps 1 and 2 for the port B internal SDI cable.
4.

Secure the SDI cables as indicated in Figure 4-8.

4—-14

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

}

o-—

fee 00l

’2////’0 Jééé%

FAN

—DISK DRIVE

POWER CORD
RECEPTACLE

: \DRIVE

CIRCUIT
BREAKER

POWER

CONTROLLER —__|

|[}

INTERFACE

BRACKET

POWER CONTROLLER

POWER

CIRCUIT BREAKER

LAMP

\\_4 /

U\
gg\glgg

LOCAL/REMOTE

SWITCH

CORD

OPENING

Figure 4-10

CX-1027A

Rear Cabinet Power Controls (40-Inch Cabinet)

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH

CABINETS

4-15

CABLE
MOUNTS/

TIE WRAPS

POWER
CONTROLLER

PLUG

DRIVE 2
DISK DRIVE

PLUG
DRIVE
1

POWER CORDS
-

PLUG
DRIVEO
CX-287B

Figure 4-11

4.5.2

Power Cord Routing on Cab Floor

Removing the Front Filler Panels

Remove the middle panel from the front of the

drive cabinet if this is the first add-on drive
to be installed. Remove the bottom panel from
the front of the drive cabinet if this is the
second add-on drive. The front cabinet panels
are held to the cabinet uprights by four nuts
and washers. Refer to Figure 4-12,

4.5.3

Extending the Cabinet Stabilizer Foot

Extend the stabilizer foot forward from the center
bottom of the drive cabinet and lower the
foot so that it makes firm contact with the
floor. This step is very important. It preven
ts the
drive cabinet from tipping forward when the new
drive is added. Refer to Figure 4-13.
WARNING
Always extend the cabinet stabilizer foot
forward before sliding a drive out of the
cabinet for any reason. Failure to do so
could cause equipment damage or bodily
injury.

4-16

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

FRONT

TOP DRIVE—]
BEZEL

FIRST ADD-ON—]

—

DRIVE BEZEL

V) 4\

SIDE VIEW

UPRIGHT

BOTTOM FRONT

FILLER PANEL

/
FRONT

\
WASHER

FILLER

\
PHILLIPS HEAD
SCREW

PANEL
CX—288B

Figure 4-12

4.6

Front Panel Removal

PREPARING THE ADD-ON DRIVE FOR INSTALLATION

The first and second add-on drives in a 40-inch (three-high) cabinet must be mounted on a

slide assembly. The top drive in a 40-inch cabinet is not mounted on slides.

Use the following procedures to prepare the add-on drive for installation.
WARNING

Since the drive weighs at least 61.2 Kg (135 pounds), you must use an approved field
service lifting device rated at 200 pounds (DIGITAL Part Number FC-10074-AC) to
place the drive onto the chassis slides.
If an approved lifting device is not available, at least three persons are required to lift
and install the disk drive. (Refer to Section 4.8.2 for the appropriate procedure.)
The head disk assembly (HDA) may be removed from the drive to reduce the total
weight by approximately 35 pounds. Refer to Section 5.6 for instructions on HDA
removal.

STABILIZER

INSTALLATION OF RA82 DISK ‘DRIVES IN THREE-HIGH CABINETS 4-17

CX-294A

Figure 4-13

4.6.1

Extending the Stabilizer Foot

Removing Internal Shipping Brackets and Packing Material

Packing materials and shipping brackets are inside the chassis of each disk drive. To remove
them, follow the procedures described in Section 3.8.

4.7

INSTALLING CABINET SLIDES

Drives must be mounted on a slide assembly. Refer to Figure 4-14 and Figure 4-15 for the
proper installation hole locations in the 40-inch (three-high) cabinet.

Note that in the 40-inch cabinet the first hole in the rear uprights above the power controller

is hole number 7. On the (ront of the 40-inch cabinet, if the lower front panel is still in
place, the next hole in the cabinet uprights above the front panel is hole number 25.

4-18

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

FRONT VIEW

REAR VIEW

C
]

1110

oll

T T T T T

°©

«i"»))

A_é/

HOLE 25

W’// PANEL

“Nlo

;

HOLE 5

HOLE 2

-®

—

T
Figure 4-14

4.7.1

o«

®
,

HOLE
7

(FIRST HOLE

ABOVE POWER
CONTROLLER]

CX—1026A

Cabinet Upright Holes (40-Inch Cabinet)

Preparing the Slides for Cabinet Mounting

Use the following procedure to prepare the cabinet slide assemblies for installation.
Assemble the left-hand slide assembly first.
I.

Locate the left-hand slide that has part number 1213686-00-REV-X-L engraved on it.

The revision level of the slide is given here as "X" because it changes occasionally. The

letter L indicates this is the left-hand slide.
Locate the plastic bag containing four slide brackets.
Locate the plastic bag containing the 8-32 X 5/16 screws.

Lay the left-hand slide on its back and push the lower half of the slide to the left to gain
access to the rear mounting holes (Figure 4-16).
Use two 8-32 screws to mount the rear slide bracket to the slide as shown in
Figurc 4-16. Don’t tighten the screws all the way since some leeway is needed later

when the slides are mounted into the cabinet.
Use two more 8-32 screws (o mount the front slide bracket to the left-hand slide. The

screws must be inserted into the mounting holes through the movable oval opening on

the slide. Tighten the two screws.

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

TOP VIEW OF CABINET

UPRIGHT 2

UPRIGHT 1

REAR

FRONT

\_]

I—/

4-19

UPRIGHT
4

UPRIGHT
3

MOUNTING HOLES
VERTICAL

VERTICAL

UPRIGHT 4
UPRIGHT 2
(RIGHT REAR) | (LEFT REAR)

ALL

VERTICAL
UPRIGHTS

DRIVE NO.

CHASSIS SLIDE BRACKET

49, 52

CHASSIS SLIDE BRACKET

28, 31

10, 13

CHASSIS SLIDE BRACKET

ESD BRACKET

49, 51

ESD BRACKET

28, 30

10, 12

ESD BRACKET
STANDOFF

22,43, 53

2
ANY DRIVE

CX—1030A

Figure 4-15

Mounting Hole Table

Press the two front leaves of the L-shaped cable retainer together and force the retainer
into the rear of the left-hand slide assembly as shown in Figure 4-16.
NOTE

A cable retainer must be used on each left-hand slide assembly for drives installed
in positions 0, 1, and 2.
8.

Locate the drive right-hand slide that has part number 1213686-00-REV-X-R engraved
on it, The revision level of the slide is given as "X" because it changes occasionally.
The letter R indicates this is the right-hand slide.

Lay the right-hand slide on its back and push the lower half of the slide to the right to
gain access to the rear mounting holes (Figure 4-17).

4-20

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

10. Use two 8-32 screws to mount the rear slide bracket to the slide. Don’t tighten the
screws all the way since some leeway is needed when the slides are later mounted into
the cabinet.
11. Use two more 8-32 screws to mount the front slide bracket to the right-hand slide.
Insert the screws into the slide mounting holes by aligning the oval opening over them.

Tighten the two screws.
Both slides are now prepared for installation into the drive cabinet.

4.7.2

Attaching Slides to Cabinet

Use the following procedures to install the slides and associated hardware in the cabinet.
1.

Go to the rear of the drive cabinet. Counting from the bottom, locate and mark the
mounting holes in both rear cabinet uprights. Refer to Figure 4-14,

Go to the front of the drive cabinet. Counting from the bottom, locate and mark the

mounting holes on both front cabinet uprights. Refer to Figure 4-14.
Locate the plastic bag containing the 10-32 X 1/2 screws.

Locate the plastic bag containing the four nut bars.
Locate the plastic bag containing two electrostatic discharge (ESD) brackets.
At the front of the cabinet, mount the right-hand slide assembly to the front-right cabinet

upright using two 10-32 screws and one nut bar as shown in Figure 4-18.
7.

Use the same procedure to mount the left-hand slide assembly to the front-left cabinet
upright.

8. Go to the rear of the cabinet. Insert one 10-32 screw through the left-hand cabinet
upright, the top hole of the right-hand slide bracket, and the top hole of the nut bar (to

hold the slide in place).

Use two more 10-32 screws to mount the ESD bracket to the upright as shown in
Figure 4-18.

10. Use the same procedure to mount the left-hand slide assembly and ESD bracket to the
rear right-hand cabinet upright.

11. Once both slides are mounted, go to the rear of the cabinet and tighten the screws

holding the slides to the slide brackets. These brackets were left loose for adjustment.
Do this for both slides.

4.8

MOUNTING THE ADD-ON DRIVE ON THE SLIDES

Use the following procedure to mount the RA82 add-on drive on the slides. Refer to
Figure 4-19.
WARNING

The cabinet stabilizer foot must be fully extended and locked (Figure 4-13).
The RAS82 disk drive weighs at least 61.2 Kg (135 pounds). DIGITAL recommends that

you use an approved field service lifting device rated at 200 pounds (DIGITAL Part
Number FC-10074-AC) to place the drive on the chassis slides.

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

10-32 SCREW

4-21

SLIDE
AR

11/16 CABLE

af%§ft///CLAMP

FLAT

WASHER
10-32 SPACER

L-SHAPED

CABLE

0.9

RETAINER

SCREW
8-3
x 5/16
2
SCREWS

BACK SIDE

SLIDE
BRACKET

8-32 x 5/16

LEFT-HAND SLIDE

SCREWS

REAR
MOUNTING
HOLES

@ZD\

~_ &

LOWER HALF

/ \}4
©

REAR SLIDE

BRACKET

(MOUNTS TO

ooy

RIGHT REAR

"f@

VERTICAL UPRIGHT)

VIEW OF BACK SIDE

O
)

‘

\
SLIDE OVAL OPENING

OVER SCREW HOLES
CX-1009A

Figure 4-16

Left-Hand Slide

4-22

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

FRONT

SLIDE
BRACKET

@\@

§S§E>\<Ng/16

SLIDE

CHANNEL

REAR SLIDE

BRACKET

(MOUNTS TO LEFT
REAR VERTICAL

UPRIGHT)

RIGHT-HAND SLIDE

REAR

MOUNTING
0

BACK SIDE

832 x 5/16

°
Figure 4-17

CREWS

Right-Hand Slide

CX—-1010A

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4-23

NO. 10

NYLON

FLAT

WASHER

£SD BRACKET

LEFT REAR

VERTICAL UPRIGHT

N\
R

|
o

’

|
R g

IR IS

Q N

NUT

BAR

— SLIDE

BRACKET
{/\

,,,

SCREW

NY LON

N
10-32 x 1/2

WASHER

RIGHT FRONT

/Q:}

RIGHT-HAND SLIDE

10-32 x 1/2

SCREWS

VERTICAL UPRIGHT

\
NUT

SLIDE

BAR

BRACKET

CX—-1012B

Figure 4-18

Mounting the Slide Assembly

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4-26
2.

Place one person on each side of the unit.
Place one person at the front of the unit.

4. The two persons at the sides of the unit grasp the front and rear of the unit and, using
the leg muscles, lift the unit together.

5. The person at the front of the unit removes the skid or other packaging material from
the immediate area.

6. The person at the front of the unit guides the lifters and assures that the slides are locked
and that the unit is resting on the slides correctly.

7. While the two are holding the RA82 in position, the third person starts two mounting

screws on each side of the unit (the one closest to the front and the one closest to the

rear).

8. Secure the remaining mounting hardware as required and continue with normal
installation procedures.

INSTALLING CABLE STANDOFFS AND U-NUTS

4.9

Cable standoffs and U-nuts are used with cable clamps in the three-high cabinet to hold the
cables away from the rear vertical uprights. The number of cable standoffs to install depends
upon the number of drives in the cabinet. Refer to Figure 4-15 for the proper three-high
RAS82 cabinet installation holes.

Use the following procedure to mount each cable standoff and U-nut. Refer to Figure 4-20.

1. Locate the plastic bags containing the cable standoffs.

Locate the plastic bag containing the U-nuts.

3. Slide each U-nut over the hole of the rear vertical upright designated in Figure 4-15.
The threaded portion of the U-nut should face the inside of the cabinet.

Screw the standoff into the U-nut.

4.10

INSTALLING THE I/O0 BULKHEAD CONNECTORS

Locate the I/O bulkhead connector that came with the add-on disk drive. Based on drive
position, each I/O bulkhead must be mounted in a designated location on the SDI interface
bracket. Using the two captive screws, mount the I/O bulkhead to the SDI interface bracket
at the rear base of the drive cabinet as shown in Figure 4-7.

4.11

INSTALLING SDI CABLES

Two six-foot SDI cables and one twelve-foot SDI cable are shipped with each add-on drive.
The two six foot SDI cables are the internal cabinet cables that connect the drive to the 1/O
bulkhead assembly. The twelve-foot SDI cable is the external cable that attaches the drive
cabinet to the disk controller in another cabinet.

When installing the SDI cables, you have to choose which of the following SDI cable
installation procedures fits your need. The first one describes how to install the SDI cables
for the first RA8X series add-on (middle cabinet position). The second one describes how to
install the SDI cables for the second RA8X series add-on (bottom cabinet position).

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4-27

VERTICAL

0o o000

0O0O0OO0COOCOOOOOOOCOOO®
6 0 007"

(((\\\~
&

STANDOFF

U-NUT —

®|lc

U-NUT —

STANDOFF

U-NUT

STANDOFF

[

..IOOOOOOO}!IOOOOOOOO%OOOOOOOOO
=

000

m——

—

UPRIGHT

i
CX—-1031A

Figure 4-20

4.11.1

Mounting U-Nut and Standoffs

Installing the First Add-On Drive SDI Cables

Use the following procedure to install the SDI cables for the first add-on drive. Refer to
Figure 4-21. See Figure 4-22 for electrical wiring diagrams of a two-drive system.
1.

Install the bottom end of the SDI cables with the I/O bulkhead on the SDI interface
bracket at the base of the cabinet.

Clamp the SDI cables to the cable retainers on the end of the drive slides and the cable
standoffs.

Starting at the T/O bulkhead, tie wrap the SDI cables as shown in Figure 4-21. Leave
enough slack in the SDI cables so the drive can slide out the front of the cabinet.

4-30

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

stalling the Second Add-On Drive SDI Cables

Use the following procedure (o install the SDI cables for the second add-on drive. Refer to

Figure 4-23. See Figure 4-24 for cable wiring diagrams of a three- and four-drive system.
1. TInstall the bottom end of the SDI cables from the second add-on drive into the I/O
bulkhead assembly at the base of the cabinet. Basedon drive position, each I/O bulkhead
mus! be mounted in a designated location on the SDI interface bracket. Using the two

captive screws, mount the I/O bulkhead to the SDI interface bracket at the rear base of
the drive cabinet as shown in Figure 4-7.

2. Clamp the SDI cables to the cable retainers on the end of the drive slides and the cable
'

standoffs.

Tie wrap the SDI cables as shown in Figure 4-23.

4. Extend the cabinet stabilizer foot and pull the drive out of the cabinet to check if there
is enough slack left in the SDI cables. Check that no cables are being pinched. If
necessary, adjust the cable loop.

This completes the SDI cable installation for the second add-on drive. The sequence cables
are added next.

NG SEQUENCE CABLES ON RA8X DISK

Sequence cables permit only one drive to start up at a time. All RA8X series disk drives
need drive sequence cables. RA60 disk drives do not use drive sequence cables because
they do not require as much start-up current. The following drive sequence cable procedures
assume that only RA8Xs are used in the cabinet.

Sequence cables must be installed or disk/data corruption or damage may result during

or after a system power failure.

stalling First Add-On Drive Sequence Cables

Use the following procedure to install the drive sequence cables on the first RA8X series
add-on drive. Refer to Figure 4-21. See Figure 4-22 for electrical wiring diagrams of a
two-drive system.

TInstall a sequence cable between the OUT connector on the back of the top drive and
the IN connector on the back of the first add-on drive.

2. Tie wrap the sequence cables to the SDI cables as shown in Figure 4-21 leaving enough
slack in the cables so the drive can be slid out the front of the cabinet.

3. Extend the cabinet stabilizer foot and then pull the add-on drive out of the cabinet to
check if you left enough slack in the sequence cables. Check that no cables are being
pinched. Adjust cables if necessary.

Use as many tie wraps as needed to dress the cables properly.

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4-31

TIE WRAPS

ouT

/
/

SEQUENCE

CABLE RETAINER

SLUG

CABLE

STANDOFF/

CABLE CLAMP

CABLE

;

EQUENCE

SEQUENC

DISK DRIVE
POWER CORD

SPACER

11/16 CABLE

VERTICAL

CLAMP

UPRIGHT

\ STANDOFF

CABLE CLAMP

T~ ESD BRACKET
'

\
10-32 SCREW

FLAT

—

U-NUT

ADD-ON DRIVE
~_

SDI CABLES

DRIVE

/O BULKHEAD

DRIVE 1

/O BULKHEAD

SDI INTERFACE

DRIVE 0

BRACKET

AC POWER CORD

Figure 4-23

RETAINER

——

-Lf]—|—

[

CABLE

Cable Routing - Second Add-On Drive

1O BULKHEAD
DRIVE 2

an
CX—103

4-32

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

EXTERNAL DRIVE

SEQUENCE CABLE

SEQUENCE
____PLUG

OUT INB A

:fl/:

.,q?
Q

DRIVEO}

(&)

Q
DRIVE
1

YK,

DRIVE 2

&4 & %
J5

CORDS

POWER

CONTROLLER

POWER

|
-1

—
|>

C@%

DRIVE O

- |>

—
@

SD| CABLES

)

| Q

INB
A

\\\b

Ja J3

i
%
4 G \ POWER

J6 J5 J4 J3

CORD

1/0

BULKHEAD

SDI CABLES

/
oA

—'DBO

I
___L

~DB1
OA

/" LB °

BULKHEAD

9 i AUTT
|
B[

NOTE 1:

ALLPORT A CONNECTIONS GO TO SDI CONTROLLER A.

NOTE 2:

HEAVY LINE INDICATES DRIVE SEQUENCE CABLE.

ALL PORT B

CONNECTIONS GO TO SDI CONTROLLER B,

CX—-1025A

Figure 4-24

Cable Wiring Diagram of a Three- or Four-Drive System (Generic)

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4.12.2

4-33

Installing the Second Add-On Drive Sequence Cables

Use the following procedure to install the sequence cables onto the second RA8X series

add-on drive. This procedure assumes that the top and middle drives are RA8X series
drives. Refer to Figure 4-23. See Figure 4-24 for electrical wiring diagrams of a three- and
four-drive system.
1.

Install a sequence cable between the OUT connector on the back of the top drive and

the IN connector on the back of the first add-on drive.

Install a second sequence cable between the OUT connector on the back of the first
add-on drive and the IN connector on the back of the second add-on drive.

Tie wrap these sequence cables to the SDI cables as shown in Figure 4-23 leaving
enough slack so the drives can be slid out the front of the cabinet.

Extend the cabinet stabilizer foot and pull the add-on drives out of the cabinet to check

if there is enough slack in the sequence cables. Check that no cables are being pinched.
Adjust cables if necessary.

Use as many tie wraps as needed to dress the cables properly.

4.13

INSTALLING THE SEQUENCE TERMINATOR PLUG

Check to see if there is a drive sequence terminator plug at the IN connector of the first
drive. If not, use the terminator plug (Part Number 70-19692-01) that comes in the add-on
RABX series drive hardware kit.

4.14

INSTALLING THE DISK DRIVE POWER CORDS

The installation of the disk drive power cord varies depending on whether you are installing

the first or second add-on drive. In general, disk drive power cords are routed with the
SDI cables down the rear cabinet upright to the power controller. The power cords are then

routed through the grommeted opening in the power controller.

4.14.1

Installing the First Add-On Drive Power Cord

Use the following procedure to install the disk drive power cord for the first RA82 add-on

drive. Refer to Figure 4-21. See Figure 4-22 for electrical wiring diagrams of a two-drive
system.

Plug the disk drive power cord into the rear of the top drive in the cabinet.

Plug the disk drive power cord into the rear of the first add-on drive.

Secure the power cords as shown in Figure 4-21.

Extend the cabinet stabilizer foot and then test whether enough slack has been left in the
power cord on the add-on drive by sliding the drive all the way forward. Leave enough

slack so there isn’t any tension on the power cord when the drive is extended. Loosen
the power cord at the standoff cable clamp if necessary.

Insert the plug ends of the power cords through the grommeted opening in the power
controller panel at the base of the cabinet.

Route the power cords over the base of the cabinet as shown in Figure 4-11.
Plug the shortest power cord into power controller receptacle J6.

Plug the power cord from the add-on drive into power controller receptacle J5.

4-34

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

After the power cords are routed properly on the base of the cabinet, secure them in
place with tie wraps. Slide the tie wraps with their rough side up through the plastic
cable mounts on the floor of the cabinet. Tighten the tie wraps around the power cords.
Cut off the excess tie wrap malerial.

4.14.2 Installing the Second Add-On Drive Power Cord
Use the following procedure to install the disk drive power cord on the second add-on drive.
Refer to Figure 4-23. See Figure 4-24 for cable wiring diagrams of a three- and four-drive
system.

Plug the disk drive power cords into the rear of the drives.

Secure the power cords as shown in Figure 4-23.

Extend the cabinet stabilizer foot, then slide the bottom disk drive all the way out of the
cabinet to test whether there is enough slack in the power cord. Check to make sure that
no cables are being pinched. Adjust the power cord loops, if necessary.

Insert all three power cords through the grommeted opening in the power controller

Route the power cords over the base of the cabinet as shown in Figure 4-11.

Plug the power cord from the second add-on drive into power controller receptacle J4.

panel.

After the power cords are routed properly on the base of the cabinet, tie wrap them in
place. Slide the tie wraps with their rough side up through the plastic cable mounts on

Plug the shortest power cord into power controller receptacle J6.

Plug the power cord from the first add-on drive into power controller receptacle J5.

the floor of the cabinet. Tighten the tie wraps around the power cords. Cut off excess
tie wrap malterial.

If you removed the HDA for installation, refer to Section 5.19 for the replacement procedure.
Remove the shipping brackets from the HDA now if this was not done when you mounted

the add-on drive onto the slides. Use the procedure described in Section 3.8.

RING THE DRIVE TO THE ESD BRACKETS
Secure the drive to the ESD brackets as described in Section 4.2.3

After insiall?m’g the add-on drive, perform the drive check-out procedure described in
Section 3.13.

4.18

REMOVING A DRIVE

This section describes how to remove an RA82 disk drive from a three-high cabinet.

INSTALLATION OF RA82 DISK DRIVES IN THREE-HIGH CABINETS

4.18.1

4-35

Removing Power

Belore reconfiguring a cabinet, remove the power from the system by tripping the circuit

breaker on the power controller. The power controller is located on the bottom of the
cabinet. The circuit breakers are located at the rear of the power controller.

4.18.2

Removing Sequence Cables (From Mounted Drives)

The sequence cables are the small, round gray cables. As the sequence cables travel down

the rear of the cabinet, they are held in place by a number of tie wraps. Cut away all the

tie wraps that hold the sequence cables in place. (Don’t cut the cable clamps that hold
the SDI cables.) Then unplug the sequence cables from the rear of the drive(s). Refer to
Figure 4-25.

4.18.3

Remcving the Power Cord (From Mounted Drives )

Use the following procedure to remove the disk drive power cord from the top drive or

drives.
1.

Cut away the three tie wraps that hold the power cord to the inside floor of the cabinet

(Figure 4-11).
2.

Remove and save the two cable clamps that hold the power cord to the rear cabinet
upright. Leave the two standoffs attached to the cabinet.

Unplug the power cords from the power controller in the base of the cabinet.

Unplug the power cord from the back of the top disk drive only if it is an RA8X series

drive.
5.

Remove the power cord from the first add-on drive (middle cabinet position) only if it
is an RABX series drive and you are installing the second add-on drive (in the bottom

cabinet position),

Pull the power cords out from the grommeted opening in the power controller panel and
save them for later reinstallation.

5-2

[NSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

LATCH

RELEASE

BUTTONS

SUPPORT
BRACKET

.
REAR

DOOR

Figure 5-1

Rear Door Removal

CX—689A

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-3

FRONT

! O OO0 O0O0O0OO0O0 OOOOOL)‘OOO‘(‘

9}\

UPRIGHT

SIDE VIEW

TOP FRONT

—

‘

e
——.
).

FILLER PANEL —y

P
BOTTOM FRONT
FILLER PANEL

FRONT

FILLER

WASHER

PHILLIPS HEAD

SCREW

PANEL

CX—690B

Figure 5-2

Front Filler Panel Removal

5-6

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

The head disk assembly (HDA) may be removed from the drive to reduce the total
weight by approximately 35 pounds. Refer to Section 5.6 for instructions on HDA
removal.

5.5.1 Removing Internal Shipping Brackets and Packing Material

Packing material and shipping brackets are inside the chassis of each disk drive. Use the
procedure described in Section 3.8 to remove the brackets and material to prepare the drive
for installation.

If you do not need to remove the HDA, follow the procedures beginning in Section 5.7 to
install the slides and mount the disk drive into the cabinet.

REMOVING THE HDA
Use the following procedure to remove the head disk assembly (HDA) from the RAS82 disk
5.6

drive.

CAUTION

For drive protection, use a grounding (electrostatic discharge) wrist strap during
the following procedures (Figure 5-3). For information on ESD protection, read
Section 1.7.

1. Unlock the upper chassis assembly by turning the two cam latches under the front bezel
180 degrees counterclockwise with a 3/16-inch allen hex wrench. Refer to Figure 5-4.

2. Raise the upper chassis assembly until the damper (gas spring) lock slides in place and
AR
NS

supports the upper chassis assembly (Figure 5-5).

Unplug connector P502 from the read/write module (Figure 5-6).

Unplug connectors P602 and P603 from the HDA preamplifier module (Figure 5-6).
Place the cable spring assembly in the RELEASED position (Figure 5-7).

Place the positioner lock in the LOCK position (Figure 5-8). The lever must be lifted
slightly to clear the surface of the read/write module.

Remove the four HDA retaining nuts and washers (Figure 5-0).
CAUTION

The HDA could be damaged if the positioner is not locked.

8. Remove the HDA from the drive by lifting it from diagonally opposite corners
(Figure 5-8). The HDA weighs approximately 35 pounds.

9. Place the HDA on a level surface in the vertical position only. Feet are provided on the
front cover of the HDA for this purpose (Figure 5-3).
CAUTION

Do not place the HDA in a horizontal position (on the pulley) or the speed and
temperature transducers mounted on the bottom of the HDA could be damaged.
If the HDA is to be moved or packed for shipment, use an HDA Spindle Pulley
Lock (DIGITAL Order Number 74-31667-01) to lock the spindle pulley in place.
Any movement of the spindle could damage the heads.

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5—7

ALLIGATOR
CLIP

i’

GROUNDING

ESD WRIST

’

\’//,/

STRAP

\"/,3\_

CORD

DRIVE

5.‘/

\(V%A

~ N\

'\//’ -y

Q/{?{ i ey ' o ‘T\ ‘\ .\.\ \‘fi'{;‘

\L(l;

L/ .é;},'t}_,_})-';'/

CX—-993A

Figure 5-3 . Connecting ESD Wrist Strap to Ground

10. Gently lift up on the upper chassis assembly to take the weight off of the gas spring.
Unlock the gas spring by pulling the locking knob out while still supporting the weight
of the upper chassis assembly. Refer to Figure 5-5.

11. Slowly lower the upper chassis assembly until resistance from the gas spring is felt.
When resistance is sufficient to ensure the gas spring will allow the logic to close
slowly, release your hold on the upper chassis assembly. Lock in place by turning the
two cam latches under the front bezel 180 degrees clockwise with a 5/16-inch allen hex
wrench. Refer to Figure 5—4.
CAUTION

DO NOT permit the upper chassis to free fall and DO NOT force the upper chassis
assembly against the gas spring pressure.
CAUTION

Do not pinch cables wnen lowering the upper chassis assembly. Check cable locations
and reroute cables, if necessary, before lowering.

5-8

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

LIFT UP
FROM
BOTTOM

CAM LATCHES
5/16 ALLEN HEX
FRONT

BEZEL
Figure 5-4

Upper Chassis Assembly

CX—-997A

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-9

PULL KNOB
TO RELEASE

SLIDE DAMPER DOWN
TO CLOSE COVER
\

DAMPER

(GAS SPRING)

CX—-998B

Figure 5-5

5.7

Damper (Gas Spring) Assembly

PREPARING THE SLIDES FOR CABINET MOUNTING

Use the following procedure to prepare the cabinet slide assemblies for installation.
Assemble the left-hand slide assembly first.

Locate the left-hand slide that has part number 1213686-00-REV-X-L engraved on it.

The revision level of the slide is given here as "X" because it changes occasionally. The
letter L. indicates this is the left-hand slide.

Locate the plastic bag containing four slide brackets,
Locate the plastic bag containing the 8-32 X 5/16 screws.

Lay the left-hand slide on its back and push the lower half of the slide to the left to gain
access to the rear mounting holes (Figure 5-9).

5-10

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

FAN

HDA

READ/WRITE
MODULE

READ/WRITE CABLE
(NOTE ROUTING)

FAN (TWO ON

POWER SUPPLY)\
CABLE
SPRING

ASSEMBLY

POSITIONER

LOCK LEVER
HDA

PREAMP
MODULE
HDA

RETAINING
NUTS (4)

Figure 5-6

CX—-1007A

HDA Connectors

Use two 8-32 screws to mount the rear slide bracket to the slide as shown in Figure 5-9.
Don’t tighten the screws all the way since some leeway is needed later when the slides
are mounted into the cabinet.

Use two more 8-32 screws to mount the front slide bracket to the left-hand slide. The
screws must be inserted into the mounting holes through the movable oval opening on
the slide. Tighten the two screws.

Press the two front leaves of the L-shaped cable retainer together and force the retainer
into the rear of the left-hand slide assembly as shown in Figure 5-9.
NOTE

A cable retainer must be used on each left-hand slide assembly for drives installed
in positions 0, 1, and 2.

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-11

CABLE

SPRING
ASSEMBLY

(STORED POSITION)

CX—-1001A

Figure 5-7

Cable Spring Assembly

5-12

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

HAND POSITIONS
FOR REMOVAL

POSITIONER LOCK
IN LOCK POSITION

—

PLASTIC BULKHEAD FEET

\ Y2

/A |
CX—-1008A

Figure 5-8

HDA Positioner Lock

Locate the drive right-hand slide that has part number 1213686-00-REV-X-R engraved
on it. The revision level of the slide is given as "X" because it changes occasionally.

The letter R indicates this is the right-hand slide.

‘

Lay the right-hand slide on its back and push the lower half of the slide to the right to
gain access (o the rear mounting holes (Figure 5-10).

10. Use two 8-32 screws to mount the rear slide bracket to the slide. Don’t tighten the
screws all the way since some leeway is needed when the slides are later mounted into

the cabinet.

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-13

I1. Use two more 8-32 screws to mount the front slide bracket to the right-hand slide.
Insert the screws into the slide mounting holes by aligning the oval opening over them.

Tighten the two screws.

Both slides are now prepared for installation into the drive cabinet.

5.8

INSTALLING CABINET SLIDES

Use the following procedures to install the slides and associated hardware in the cabinet.
Refer to Table 5-3 for the proper four-high RA82 cabinet installation holes.
Table 5-3

RA82 Installation Holes

FRONT
Slide

REAR
Slide

ESD

RIGHT REAR«

LEFT
REAR

Holes

Brackets

Clamp/Standoff

Drive 3

66, 70

67, 69

Not used

Drive 0

48, 52

49, 51

438

Drive 1

27, 31

28, 30

Drive 2

9, 13

10, 12

Drive

Position

* RIGHT REAR refers to the right rear vertical upright as viewed from the front of the

cabinet. LEFT REAR refers to the left rear vertical upright as viewed from the front of the
cabinet.
1.

Go to the rear of the drive cabinet. Counting from the bottom, locate and mark the
mounting holes in both rear cabinet uprights. Refer to Figure 5-11.

Go to the front of the drive cabinet. Counting from the bottom, locate and mark the
mounting holes on both front cabinet uprights. Refer to Figure 5—11.

Locate the plastic bag containing the 10-32 X 1/2 screws.

Locate the plastic bag containing the four nut bars.

Locate the plastic bag containing two electrostatic discharge (ESD) brackets.

At the front of the cabinet, mount the right-hand slide assembly to the front right cabinet
upright using two 10-32 screws and one nut bar as shown in Figure 5-12.

Use the same procedure to mount the left-hand slide assembly to the front left cabinet

upright.

Go to the rear of the cabinet. Insert one 10-32 screw through the left-hand cabinet
upright, the top hole of the right-hand slide bracket, and the top hole of the nut bar (to

hold the slide in place).

Use two more 10-32 screws to mount the ESD bracket to the upright as shown in

Figure 5-12.

10. Use the same procedure to mount the left-hand slide assembly and ESD bracket to the
rear right-hand cabinet upright.

5-14

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

10-32

SLIDE

SCREW

REAR
11/16 CABLE
CLAMP

FLAT
WASHER

10-32 SPACER

| SHAPED

CABLE

T AINER

10-32

SCREW

8-32
x 5/16
SCREWS

BACK SIDE

SLIDE
BRACKET

LEFT-HAND SLIDE

8-32 x 5/16

SCREWS

REAR
MOUNTING
HOLES

LOWER HALF

(MOUNTS TO

RIGHT REAR

VERTICAL UPRIGHT)

L 2SS

REAR SLIDE

BRACKET

(&)

;

VIEW OF BACK SIDE

SLIDE OVAL OPENING
OVER SCREW HOLES
CX—1009A

Figure 5-9

Left-Hand Slide

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-15

FRONT

SLIDE
BRACKET

@ 2

SLIDE

8-32 x 5/16

CHANNEL

REAR SLIDE

SCREWS

BRACKET

(MOUNTS TO LEFT
REAR

VERTICAL

UPRIGHT)

REAR

RIGHT-HAND SLIDE

MOUNTING
HOLES

/00

BACK SIDE

/’I(,/ €
@

8-32 x 5/16
SCREWS

Figure 5-10

Right-Hand Slide

11. Once both slides are mounted, go (o the rear of (he cabinet and tighten the screws

holding the slides to the slide brackets. These brackets were left loose for adjustment.
Do this for both slides.

CX—-1010A

5-16

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

REAR VIEW

FRONT VIEW

TITTLT
T
T T T ILTIT

[o]

HOLE 25

tq‘//__/PANEL

HOLE
5
2
HOLE

em Bl
0

)

.°°“DI]|

00:ooooooooooooovoooooooooooouo.oooo,oooooooo

o110

\/A

]

IIIIHHIHIIIIIIIH!IIIIHII"

HOLE 7

(FIRST HOLE
ABOVE POWER

Figure 5-11

Cabinet Upright Holes (60-Inch Cabinet)

(]

CONTROLLER)

CX-1011A

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-17

NO. 10

NYLON — FLAT

WASHER

ESD BRACKET
\

LEFT REAR
VERTICAL UPRIGHT

)
N

e 1R
8

310 || IR

- 1 nuT
N

BAR

— SLIDE
BRACKET

S/’

~
NY LON

WASHER

RIGHT FRONT

10-32 x 1/2
SCREW

10-32
x 1/2

VERTICAL UPRIGHT
/‘P’

SCREWS

RIGHT-HAND SLIDE

g;:

/fi

NUT

SLIDE

BAR

BRACKET

CX—1012B

Figure 5-12

Mounting the Slide Assembly

5-18

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5.9

EXTENDING CABINET STABILIZER FOOT

The cabinet stabilizer foot is part of an interlock mechanism that prevents the drive cabinet
from tipping forward when a drive is extended on its slides or when a new drive is installed
into the cabinet. Extend the stabilizer foot forward from the center bottom of the drive

cabinet and lower it until makes firm contact with the floor. Refer to Figure 5-13.
WARNING

Always extend the cabinet stabilizer foot completely forward before placing a drive on

the slides or sliding a drive out of the cabinet. Failure to do so could cause equipment
damage or bodily injury.
Also, do not push stabilizer foot in while drive is extended. Damage to cabinet interlock
mechanism could result.

5.10

CABINET INTERLOCK

The cabinet interlock maintains cabinet stability and ensures operator safety. If the stabilizer
foot is retracted, all drives are locked and cannot be extended on the slides. When the

stabilizer foot is extended, the cabinet interlock mechanism is released to allow only one

drive at a (ime to be extended.

5.10.1

Positioning Interlock Rod Actuator

Before the drive is installed, position the interlock rod actuator contained within the front-left

upright of the cabinet to prevent damage to the interlock mechanism during drive installation.
Do this by manually rotating the interlock rod actuator 90 degrees clockwise until the cutout

portion of the rod actuator faces frontwards, ready to engage the drive actuator (Figure 5—14)
of the drive.
NOTE
The rod actuator does not rotate unless the stabilizer foot is extended.

5.11

MOUNTING THE ADD-ON DRIVE ON THE SLIDES

Use the following procedure to mount the RA82 add-on drive on the slides. Refer to
Figure 5-15.
WARNING
The cabinet stabilizer foot must be fully extended and locked (Section 5.9).
The RAS82 disk drive weighs at least 61.2 Kg (135 pounds). DIGITAL recommends that

you use an approved field service lifting device rated at 200 pounds (DIGITAL Part
Number FC-10074-AC) to place the drive onto the chassis slides.

The head disk assembly (HDA) may be removed from the drive to reduce the total
weight by approximately 35 pounds. Refer to Section 5.6 for instructions on HDA
removal.

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

STABILIZER FOOT

Figure 5—-13

Stabilizer Foot Extension

CX—-691A

5-19

5—20

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

LEFT
FRONT
VERTICAL

UPRIGHT

INTERLOCK
ROD ACTUATOR

CX—-862A

Figure 5-14

2.11.1

Interlock Rod Actuator

Mounting the Drive Using an Approved Lifting Device

Use the following procedure to install an RA82 drive using an approved lifting device. If no
lifting device is available refer to Section 5.11.2 for the proper procedure.

1. Pull the right and left slides out of the cabinet until they lock in place. Lift lock arm
A on both arms and pull both slides out of the cabinet until they are fully extended

forward. Refer to Figure 5-15.

Lift the drive with the lifting dev1ce.

Lower the drive onto the extended slides so the drive front bezel is about one inch
forward of the front end of the slide.
WARNING

Make sure the drive mounting rails and slides engage properly. If not, the drive
could fall between the slides.

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-21

Push the drive toward the rear of the slide assembly until it engages the top slide stops.

Refer to Figure 5-15.
5.

Insert the 8-32 x 5/16 mounting screws through the openings on each slide to secure the
drive to the slide assemblies. Only the front screw holes in the drive will be visible.

Release the slide lock arm B on both slides and push the drive back slowly until the
next drive mounting hole lines up with the keyhole opening in the slides. Refer to
Figure 5-15.

Insert 8-32 x 5/16 screws into the keyhole openings on each slide to complete the
mounting procedure of the drive to the slides.

Release slide lock arm A on both arms to push the drive the rest of the way into the
cabinet. Refer to Figure 5-15.

NOTE
|
If the drive does not slide into the cabinet freely, loosen the front serews on the slide
brackets and make the necessary adjustments before retightening them. Ensure the
slide brackets are mounted in the proper cabinet upright holes and that there is enough

vertical and horizontal play to allow the drives to move freely.

9.11.2

Mounting the Drive Without an Approved Lifting Device

If you do not have an approved lifting device available use the following procedure to install
an RA82 disk drive. The following procedure requires three people.

WARNING

The slides must be fully extended and locked, and the cabinet stabilizer foot must be

fully extended and locked before this procedure is attempted
1.

Make certain the work area is clear of obstructions, cables, etc.

Place one person on each side of the unit.

Place one person at the front of the unit.

The two persons at the sides of the unit grasp the front and rear of the unit and using

)

the leg muscles lift the unit together.

The person at the front of the unit removes the skid or other packaging material from

the immediate area.

The person at the front of the unit guides the lifters and assures that the slides are locked
and that the unit is resting on the slides correctly.

While the two are holding the RA82 in position, the third person starts two mounting

screws on each side of the unit (the one closest to the front and the one closest to the

rear).

Secure the remaining mounting hardware as required and continue with normal
installation procedures.

5-22

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

SLIDE

KEYHOLE

STOP

OPENING

[

LOCK ARM B

LOCK ARM A

DRIVE

FRONT
BEZEL

LIFTING

/ DEVICE

_ MOUNTING
RAIL
STABILIZER

SLIDE

FOOT

ASSEMBLY

[ SLIDE

SCREW

CX-921A

Figure 5-15

Mounting the Drive on Slides

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5.12

5-23

MOUNTING THE I/O BULKHEAD ON THE SDI INTERFACE
BRACKET

Locate the I/O bulkhead shipped with the add-on disk drive (attached to the end of the SDI
cable). Based on drive position, each 1/O bulkhead must be mounted in a designated location
on the SDI interface bracket. Using the two captive screws, mount the I/O bulkhead to the
SDI interface bracket at the rear base of the drive cabinet as shown in Figure 5-16.

/O BULKHEAD
FOR DRIVE 1

SDI INTERFACE

" BRACKET

/O BULKHEAD
FOR DRIVE 3

\é\
1/0 BULKHEAD

FOR DRIVE 0

L GABLE <

EXTERNAL

SDI

INTERNAL

CABL

DI CABLES

CONNECTIONS

1/0 BULKHEAD /'\L
FOR DRIVE 2

CAPTIVE

MOUNTING

SOREWS

CAPTIVE

CABLE

SHIELD

TERMINATORS

VIOUNTING

SCREWS

Figure 5-16

5.13

CX—-6856C

1/0 Bulkhead Mounting

INSTALLING CABLE STANDOFF AND U-NUT

Cable standoffs and U-nuts are used with cable clamps in the four-high cabinet to hold the
cables away from the rear vertical uprights. The number of cable standoffs to install depends

upon the number of drives in the cabinet. Refer to Table 5-3 for the proper four-high RA82
cabinet installation holes.

Use the following procedure to mount each cable standoff and U-nut. Refer to Figure 5-17.
1.

Locate the plastic bags containing the cable standoffs.

Locate the plastic bag containing the U-nuts.

3. Slide each U-nut over the hole of the rear vertical upright designated in Table 5-3. The
threaded portion of the U-nut should face the inside of the cabinet.

Screw the standoff into the U-nut.

5-24

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

“llllIlllllllllllIllllllllll"

Q’

;

STANDOFF

U-NUT

.U‘_NUT /

STANDOFF

UnuT —
|

STANDOFF

0
n

U-NUT

// STANDOFF

4 oo | []]

WYX,

5.14

U-NUT

// STANDOFF

U-NUT

/ STANDOFF

U-NUT

// STANDOFF

Figure 5-17

®@ ® |o OCOOOOOOOO%OOOOOOOOOOOO%{OOO‘?

UPRIGHT

”

VERTICAL

.‘0000000%00000000!1000000000 0 0 0o 00O 00 00 0O 0 0 0 0 o0 |

CX—-1268A

Mounting U-Nut and Standoffs

INSTALLING SDI CABLES

The 12-foot SDI cable shipped with all add-on drives is the internal cabinet cable that
connects the drive to the 1/O bulkhead. The external SDI cable attaches the drive cabinet to
the disk controller in another cabinet.

When installing the SDI cables, you must choose which of the SDI cable installation
procedures in the following paragraphs fits your needs. The first one describes how to

install the SDI cables for the first add-on (lower-middle cabinet position). The second one
describes how to install the SDI cables for the second add-on (bottom cabinet position).

The third procedure describes how to install the SDI cables for the third add-on (top cabinet
position).

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-25

External SDI cables from the central processing unit (CPU) or controller cabinet are

connected to the inside of the I/O bulkhead (opposite side of the SDI interface bracket
from the internal SDI cables). Refer to Figure 5-16.
Refer (o Table 5-3 for the proper four-high RA82 cabinet installation holes.

5.14.1

Installing First Add-On Drive SDI Cables

Use the following procedure to install the SDI cables for the first add-on drive. Refer to
Figure 5-18 to tie-wrap and route cables. Figure 5-19 shows the wiring diagram for two

drives.

Install the bottom end of the SDI cable (end with I/O bulkhead) onto the SDI interface
bracket at the base of the cabinet. Using the two captive screws, mount the 1/O bulkhead

in the internal SDI cable position designated for Drive 1 (Figure 5-16). Make sure drive
port cable A plugs into the A connector and the port cable B plugs into the B connector
of the I/O bulkhead.

NOTE

Mount the I/O bulkheads on the left side of the SDI interface bracket by turmng
them 180 degrees from those on the right side. Tlns shouid be apparent when the

screw holes are aligned.
2.

Clamp the SDI cables to the cable retainers on the end of the dnve slides and the cable
standoffs (Figure 5-18).

Starting at the T/O bulkhead, tie-wrap the SDI cables to the vertical upright. Leave
enough slack in the SDI cables so the drive can slide out the front of the cabinet to its
fully extended position. Use as many tie wraps as needed to dress the cables properly.

Extend the cabinet stabilizer foot and then pull the add-on drive out of the cabinet to see
if you left enough slackin the SDI cables. There shouldn’t be any tension placed on the
cables. Adjust the SDI cable loops now, if necessary, so the cables are not be pinched

when the drive slides in and out.
This completes the SDI cable installation for the first add-on drive. Go to Secilon 5. 15 to

add the sequence cables.

5.14.2 Installing Second Add-On Drive SDI Cables
Use the following procedure to install the SDI cables for the second add-on drive. Refer to

Figure 5-20. Refer to Figure 5-18 to tie-wrap and route the cables.
1.

Install the bottom end of the SDI cable (end with I/O bulkhead) from the second add-on

drive into the SDI interface bracket at the base of the cabinet. Using the two captive
screws, mount the I/O bulkheadin the internal SDI cable position designated for Drive

2 (Figure 5-16). Make sure drive port cable A plugs into the A connector and the port

cable B plugs into the B connector of the I/O bulkhead.
NOTE

Mount the /O bulkheads on the left side of the SDI interface bracket by turning
them 180 degrees from those on the right side. This should be apparent when the
screw holes are aligned.
2.

Clamp the SDI cables to the cable retainers on the end of the drive slides and the cable
standoffs (Figure 5-18).

5-26

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

SDI CABLES

TIE WRAPS

| DISKDRIVE

ESD BRACKET

POWER CORD

ouT

STANDOFF/

/ CABLE CLAMP
CABLE RETAINER

SEQUENCE

CABLE

PLUG

STANDOFF/

" CABLE CLAMP

STANDOFF/

SEQUENCE

L CABLES

CABLE CLAMP

11/16 CABLE

VERTICAL

CLAMP

UPRIGHT

\ STANDOEE

STANDOFF/

- CABLE CLAMP

10-32

2 \ U-NUT e
SCREW

FLAT

WASHER

o E o
a

CABLE CLAMP

ol
0|l

SDI INTERFACE

/O BULKHEAD — BRACKET
Figure 5-18

RA82 Cable Routing and Connections

CABLE CLAMP CABLE
v

STANDOFF/

SPACER

STANDOFF/

CABLE RETAINER

l‘

RETAINER

CABLE CLAMP

AC POWER CORD

]'—___I:

CX—1018B

@_@
>

SEQUENCE

PLUG

—

DRIVE
0

INB A

OUT

° ]j

@b :

[

DRIVE 1
e

ewn

B2 LBJA: OJs 0OJ6 ém
ouvel|

ous

Ou2

POWER

CORDS

emeT——

5-27

—

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

POWER

0J3

CONTROLLER

/BULKHEAD
0aA 1
s
A

SDI CABLES

L
NOTE 1: ALL PORT A CONNECTIONS GO TO SDI CONTROLLER A. ALL PORT B
CONNECTIONS GO TO SDI CONTROLLER B.

NOTE 2: HEAVY LINE INDICATES DRIVE SEQUENCE CABLE.
CX—1014B

Figure 5-19

Cable Wiring Diagram (First Add-On RA82)

5-30

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

OUT

INB
A

u”

@) =

OUT

3
DRIVE

INB
A

0,
~

SEQUENCE/
PLUG

o@o

DRIVE0

OUT INBA

—

¢
DRIVE 1

c@o
OUT INB
A

==X

[

e
S B

POWER

—

CORDS

u@\)

DRIVE 2

POWER

Qua

Qus

Ode|

Ou1

g3|

g1 |
0J3

CONTROLLER

n
I

SDI CABLES

B [ ——J

i 1
(s

DAO

, B[] —

/DB

Af]

BULKHEAD

NOTE 1:

ALLPORT A CONNECTIONS GO TO SDI CONTROLLER A.

ALL PORTB

CONNECTIONS GO TO SDI CONTROLLER B.

NOTE 2:

HEAVY LINE INDICATES DRIVE SEQUENCE CABLE.

Figure 5-21

Cable Wiring Diagram (Third Add-On RA82)

CX-1016B

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-31

EXTERNAL DRIVE

SEQUENCE CABLE

INB A

OUT
K

;

SEQUENCE

OUT INB A

| PLUG

DRIVE 3

]

OUT INB A
D

DRIVE O

)

OUT

INB A

SD| CABLES

DRIVE O
—

—

INB A

> 9 D [ij

B
O,

DRIVE 2

CORDS

l
!

POWER

1 CONTROLLER [T

92| hus oJs oue| LU DJ3mfi
p3| §J7 ©J8 OJ9| L2

POWER

‘fij

[

DRIVE 1

=%
OUT

e \

POWER
0l mJ2“m?,fl CORD
05 DJ9|
)4 Dug
gg3l2| ©J7
oJ4

1/0
BULKHEAD

SDI CABLES

/
A

DA1

3BD—j
Al

110

/ []BO

BULKHEAD

2 Al

|
=

NOTE 1: ALL PORT A CONNECTIONS GO TO SDI CONTROLLER A. ALL PORT B CONNECTIONS GO TO SDI CONTROLLER B.
NOTE 2. :

H HEAVY Y L LINE INDICATES S DRIVE SEQUEN CE CABLE :

Figure 5-22
5.15.1

CX—1017B

Cable Wiring Diagram - External Drive (Generic)

Installing First Add-On Drive Sequence Cables

Use the following procedure and Figure 5-19 to install the drive sequence cables on the first
RAB82 add-on drive (Drive 1). This procedure assumes the original drive (Drive 0) is also an
RAS2.

Install a sequence plug in the in connector.

5—32

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

Install a sequence cable between the OUT connector on the back of the original drive
and the IN connector on the back of the first add-on drive.

Tie wrap the sequence cables to the SDI cables, leaving enough slack in the cables so

the drive can slide out the front of the cabinet.

Extend the cabinet stabilizer foot and then pull the add-on drive out of the cabinet to
check if you left enough slack in the sequence cables.

Use as many tie wraps as needed to dress the cables properly.

Be sure cables are not pinched when drive is moved in and out.

9.13.2

Installing Second Add-On Drive Sequence Cables

Use the following procedur
and
e Figure 5-20 to install the sequence cables onto the second

RAB2 add-on drive (Drive 2). This procedure assumes the drives already mounted are RA82

drives.

‘

Install a second sequence cable between the IN connector on the back of second add-on
drive and connect it 1o the OUT connector on the first add-on drive.

Tie wrap the sequence cables to the SDI cables, leaving enough slack in the cables so

the drive can slide out the front of the cabinet.

Extend the cabinet stabilizer foot, then pull the add-on drive out of the cabinet to check
it you left enough slack in the sequence cables.

Use as many tie wraps as needed to dress the cables properly.
Be sure cables are not pinched when drive is moved in and out.

9.15.3

Installing Third Add-On Drive Sequence Cables

Use the following procedure and Figure 5-21 to install the sequence cables onto the third
RA82 add-on drive (Drive 3). This procedure assumes the drives already mounted are RA82
drives.

Install a third sequence cable from the IN connector on the third add-on drive to the
OUT connector on the second add-on drive.

Tie wrap the sequence cables to the SDI cables, leaving enough slack in the cables so
the drive can slide out the front of the cabinet.

Extend the cabinet stabilizer foot and then pull the add-on drive out of the cabinet to
check if you left enough slack in the sequence cables.

Use as many tie wraps as needed to dress the cables properly.

Be sure cables are not pinched when drive is moved in and out.

Refer to Table 5-3 for tie-wrap hole locations.

5.16

INSTALLING SEQUENCE TERMINATOR PLUG

Check to see if there is a drive sequence terminator plug at the IN connector on Drive 0

(second down from the top). One should be there already. If it is not, use the terminator
plug (Part Number 70-19692-01) that comes in the add-on RA8X drive hardware kit. Refer
“to the insert on Figure 5-18.
|
'
|
The sequence terminator plug position would change if this cabinet were externally
connecled to other drives (Figure 5-22).

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5.17

5-33

INSTALLING DISK DRIVE POWER CORD

The installation of the disk drive power cord varies depending on whether you are installing
the first, second, or third add-on drive. In general, however, power cords are routed with the
SDI cables. This is shown in the fully-loaded cabinet configuration of Figure 5-18.
Route and plug the disk drive power cords from each drive into the receptacles designated

in Figure 5-23. The disk drive power requirements must be equally distributed between (he
three phases of the power controller (Section 5.18). Secure the power cords over the base of

the cabinet with cable mounts and tie wraps as shown.

5.18

POWER CONTROLLERS

The 881 power controller was developed for the H9646-AH/AJ series cabinets.

A general-purpose, three-phase power controller controls and distributes ac power to various
ac devices packaged in an operating system. In addition, both versions (A and B) are
fully filtered, contain nine outlets, and are packaged in a 3.4-inch enclosure. For detailed
information and instructions on how (o operate the 881 power controller, refer to the 881

Power Controller User Guide mcluded with this cabinet. See Section 2.2 for information on

power control switches.

CAUTION
The nine outlets on the 881 power controller are divided into three outlets per phase.
To prevent load imbalance, equally distribute
the power to the drives between all three
phases of the power controller. Refer to the appropriate cable wiring diagram in this
chapter for proper power controller connections.

5.19

REPLACING THE HDA

If you removed the HDA before installing the add-on RA82 drive on the slides, use the

following procedure to replace the HDA. Refer to the appropriate disk drive user guide if
the drive is an RA80 or RASI.

CAUTION
For drive protection, use a groundmg (electrostatic discharge) wrist strap durmg the
following procedures (Flgure 5-3). Also, read Section 1.7 for information on ESD
protection.
1.

Check that the cable spring assembly is in the RELEASED position (towards the rear).
Refer to Figure 5-7.

Position the motor/brake assembly towards front of drive (swing slightly out on pivot
rod) to take tension off driVe belt.

Center the drive belt on the belt ramp. bracket on the lower chassis as illustrated in
Figure 5-24.

CAUTION
Damage to the HDA or drive belt may result if the drive belt is not allgned
correctly.

Lift the HDA by grasping it from diagonally opposite corners (Figure 5-8). The HDA
weighs approximaltely 35 pounds.

Lower the HDA over the four mounting bolts

5-34

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

PHASE DIAGRAM

POWER
CONTROLLER

LABEL

_///

RECEPTACLE

E$§$§fi

DISK DRIVE
POWER CORDS

CABLE

MOUNT/
TIE WRAP
CX—-10198B

Figure 5-23

Routing Power Cords on Cabinet Floor (Four-High)

INSTALLING RA82 ADD-ON DRIVES IN FOUR-HIGH CABINET

5-35

PIVOT
ROD

MOTOR

;;;;;;

PULLEY

BELT

RAMP

BRACKET

\
Y

.
.

’

CABLE

SPRING
[

DRIVE

ASSEMBLY

BELT

CX—-1020A

Figure 5-24

Belt Alignment

Replace the four nuts and washers holding the HDA to its mounting bolts, and firmly
tighten the four nuts to the mounting bolts with a 7/16-inch nut driver. Refer to
Figure 5-6.

Connect P502 from the read/write module (Figure 5-6).

Connect P602 and P603 from the HDA preamplifier module (Figure 5-0).

Lock the positioner in the UNLOCK position (Figure 5-8). The lever must be lifted
slightly to clear the surface of the read/write module.

10. Place the cable spring assembly in the ENGAGED position (Figure 5-7).

11. Position the read/write cable between the ribs on HDA housing to assure that the cable
does not get pinched when the cover is closed. See Figure 5-6.

6
INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6.1 INTRODUCTION
This chapter describes how to install RA82 disk drives into an SA432 cabinet.

6.2

UNPACKING THE ADD-ON DRIVE FROM THE BOX

Open the add-on drive box and check the contents listed in the following sections.

6.2.1

Add-On Hardware Mounting Kit Parts Checklist

Inside the plastic bag(s) of the add-on hardware kit, you should find the following parts. Use
this check list to make sure they are all present.
Table 6-1

RA82 Add-On Drive Checklist

Quan

Part Description

Part Number

RAS82 disk drive

70-21577-01 (60 Hz) or 70-2157702 (50 Hz)

RAS82 hardware mounting
kit(checklist below)

70-20194-021

Chassis slide set (containing left and

12-13686-00

17-00083-23 (125 volts) or 1700083-24 (250 volts)

Rev

right slides)

Power cord, disk drive, 9 feet

Power cord, diék drive, 9 feet, 15A

17-00442-19

Cable, SDI, 12 feet (internal)

BC26V-12

"The 70-20194-02 hardware kit is used to mount RA82 disk drives into three- and fouf-high cabinets, including
SA cabinets.

6—-2

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6.2.2

Add-On Hardware Mounting Kit Parts Checklist

Inside the plastic bag(s) of the add-on hardware kit, you should find the following parts. Use

Table 6-2 to make sure they are all present.

Table 6-2

RA82 Hardware Mounting Kit Checklist

Quan

Description

Part Number

Min Rev

Retainer, cable spring

74-25326-01

Brackets, chassis slide

74-19261-00

Cable, drive sequence, 8-foot

70-19690-08

Brackets; ESD (not used on SA cabinets)

74-28330-01

Plug

' 70-19692-01

Bar, nut

74-25168-01

Screws, Sems Pan Phillip, 8/32 x 5/16-inch

90-10174-01

Screws, Sems Truss Phillip, 10/32 x 1/2-inch

90-09700-00

Clamp, cable, screw mounted, 11/16-inch

90-07088-00

Ties, cable, 1 3/4-inch

90-07032-00

Washers, flat SST

90-06664-00

Retainer, U-nut, 10-32

90-07786-00

Standoff, male/female, hex 10-32

90-00001-22

Spacer, threaded, hex 10-32

90-07662-00

Washer, shoulder nylon (not used on SA)

12-19700-02

Standoff, 6-32 (SA cabinets only)

90-00001-06

Cover, control panel (SA cabinets iny)

74-34388-01

Bracket, ESD (SA cabinets only)

74-36472-01

Screw, 10-32 .625 (SA cabinets only)

12-21368-02

6.3

A
CR

PREPARING THE SA482

In order to add an RA82 disk drive to the SA482 cabinet, the SA482 must be spun down

and power removed.
1.

Release the A and the B port buttons on the operator control panel to the QUT position
on each drive in the SA482.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482 6-3

Spin down the SA482 by releasing the RUN/STOP button on the operator control panel
on the front of each disk drive to the OUT position.

6.3.1 Removing
the Rear Door
Press down on each of the two latch release buttons. Then lift and remove the door from the
bottom two support brackets. Refer to Figure 6-1.

LATCH
RELEASE
BUTTONS

SUPPORT
|

BRACKET

REAR

DOOR

Figure 6-1

CX—-689A

Removing the Rear Door

CAUTION
Before proceeding, turn OFF the ac circuit breaker for each drive and for the cabinet.

6—4

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6.3.2

Removing the Front Door

Obtain access to the drive elements in the SA482 by IooSening the two hex latch releases

(Figure 6-2) located at the top of the SA482 front door and lifting the panel up and out.
Replacement of the door panelis the reverse procedure of removal.

LATCH
RELEASE

HEX

WRENCH
RENCH —_|

SUPPORT

BRACKET

DOOR

Figure 6—2

Disk Drive Access in SA482

CX—1289B

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6.3.3

6-5

Front Door Filler Plate Removal

Carefully remove the appropriate front door filler plate from inside the front door. This filler
plate is held in place by two screws accessible from the inside of the front door. Refer (o
Figure 6-3.

FRONT DOOR
BEZEL

\
FRONT

DOOR
BEZEL

R
‘:HH”'“ | ‘””:HHH“
Al
i

FILLER

FRONT DOOR
(REAR VIEW)

Figure 6-3

6.3.4

PLATE
CX—-2091A

Filler Plate Removal

Extending the Cabinet Stabilizer Foot

The cabinet stabilizer foot prevents the drive cabinet from tipping forward when a drive
is exlended on its slides or when a new drive is installed in the cabinet. Extend the foot
forward from the center bottom of the drive cabinet and lower it until it makes firm contact

with the floor. Refer to Figure 6-4.

WARNING

Always extend the cabinet stabilizer foot completely forward before placing a drive on
the slides or sliding a drive out of the cabinet.

6—-6

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

STABILIZER FOOT

Figure 6-4

CX—-1290A

Stabilizer Foot Extension

CAUTION
Do not push the stabilizer foot in while the drive is extended.

6.4 PREPARING THE ADD-ON DRIVE FOR INSTALLATION
Each RAS82 disk drive in the SA482 cabinet must be mounted on a slide assembly. Use the
procedures in the following sections to prepare the add-on drive for installation.
NOTE

Since the drive weighs at least 61.2 Kg (135 pounds), DIGITAL recommends that
an approved field service lifting device rated at 200 pounds (DIGITAL Part Number
FC-10074-AC) be used to place the drive on the chassis slides.
If an approved lifting device is not available, at least three persons are required to lift
and install the disk drive. Refer to Section 6.7.2 for the proper procedure.

The head disk assembly (HDA) may be removed from the drive to reduce the total weight

by approximately 35 pounds. Refer to Section 6.16 for instructions on HDA removal.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6.4.1

6-7

Removing Internal Shipping Brackets and Packing Material

Packing material and shipping brackets are inside the chassis of each disk drive. Use
the following procedure to remove the brackets and material and prepare the drive for
installation.
CAUTION

Use a grounding (electrostatic discharge) wrist strap during the following procedures

for drive protection (Figure 6-5). Also, read Section 1.7 for information on ESD
protection.
|

ALLIGATOR

CLIP

GROUNDING

ESD WRIST

\'x,,-,/

STRAP

'\'

/7 s

CORD

£
_\7

\/%\
P

_:\

>
=\

>
{4,(( / i ey Y

S
X '_“\\\\\_‘-U/’

Figure 6-5

CX—-993A

Connecting ESD Wrist Strap to Ground

Unlock the upper chassis assembly by turning the two cam latches under the front bezel

180 degrees counterclockwise with a 5/16-inch allen hex wrench. Refer to Figure 6-6.

Raise the upper chassis assembly until the damper (gas spring) lock slides in place and

the cover is supported by the damper (Figure 6-7).

CAUTION
To prevent HDA and head damage, never open or close the upper chassis assembly

while the drive is operating.

6—8

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

LIFT UP

FROM
BOTTOM

CAM LATCHES
5/16 ALLEN HEX
FRONT

BEZEL
Figure 6—6

Upper Chassis Assembly

CA—-997A

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-9

PULL KNOB

—~
N

TO
RELEA

SLIDE DAMPER DOWN
TO CLOSE COVER
DAMPER

(GAS SPRING)

CX—-998B

Figure 6-7

Damper (Gas Spring) Assembly

Locate the three red shipping brackets that fasten the HDA to its mountings. Refer to

Figure 6-8.

Remove the three red shipping brackets by unscrewing the 7/16-inch hex retaining nuts

and removing the number 10 (5/32 A/F) allen cap screws and cap screw washers from

the sides of the brackets.

6—-10

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

SPINDLE MOTOR/
BRAKE ASSEMBLY

SHIPPING

BLOCK

TM /

SHIPPING

LOCK

BRACKETS

SHIPPING
BRACKET

HDA

RETAINING
NUT

POSITIONER

LOCK LEVER
SHIPPING

LOCKWASHER

BRACKET
FLAT
WASHER

ALLEN

CAP SCREW

HDA MOUNTING

AND WASHER

FLANGE

SHOCK
MOUNT

FRONT VIEW

CX—-999A

Figure 6-8

HDA Shipping Brackets

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6—11

Shide the shipping brackets out from under the HDA retaining nuts, and remove the cap
screw and cap screw washers. Refer to Figure 6-8. The HDA retaining nuts are used to
hold down the HDA after the shipping brackets are removed.
NOTE

Save all shipping brackets and hardware for future use when moving equipment.
6.

Remove the foam shipping block from between the spindle motor and the right rear
HDA bracket. Refer to Figure 6-8.
Firmly tighten all four HDA retaining nuts with a 7/16-inch nut driver.

Figure 6-9.

HDA

Refer to

READ/WRITE
MODULE

READ/WRITE CABLE

(NOTE ROUTING)

FAN (TWO ON

POWER SUPPLY)

ASSEMBLY

POSITIONER

LOCK LEVER

> PREAMP
MODULE

HDA
RETAINING

NUTS (4)

CX—-1000A

Figure 6-9

HDA Details

Ensure the cable spring assembly is in the ENGAGED position as shown in

Figure 6-10.

6—-12

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

CABLE

SPRING
ASSEMBLY

(STORED POSITION)

CX—-1001A

Figure 6-10

Cable Spring Assembly

NOTE
1
cable
An interlock switch prevents the spindie motor from operating while the
spring assembly tension is released. The cable spring assembly must be inthe
ENGAGED position for spinup.

Remove positioner lock seal and place the positioner lock lever on the
UNLOCK position (Figure 6-8).

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6—13

10. Unlock the logic access cover by manually turning the two captive fastener assembly

screws several turns counterclockwise. Release and tighten these screws by hand only.
Refer to Figure 6-11.
11. Fold out the logic access cover.

12. Check all modules, cables, and connections. Make sure all cable connectors are firmly

seated in the mating connectors.
NOTE

Visually inspect all modules and components for obvmm damage. DO NOT operate
eqmpment if components are damaged. Report all damage to the DIGITAL field
service or sales office and to the delivery agent.
13. Refurn the logic access cover to its original closed position.

Lock the two captive

fastener assembly screws by manudlly turning them clockwise. Make sure the logic
access cover is securely lockedin place. Refer to Figure 6-11.
|

14. Position the read/write cable between ribs on the HDA to assure that the cable does not
get pmched when the cover is closed. Refer to Figure 6-9.
CAUTION

Do not pinch cables when lowering the upper chassm assembly. Check cable
locations and reroute cables, if necessary, before lowering.

6-14

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

CAPTIVE

SCREWS

T
SERVO

MODULE

N
|

CLOSED VIEW

§ \

N
OPEN VIEW
CX—-1002A

Figure 6-11

Opening the Logic Access Cover

15. Remove and discard the eight screws that hold the
for screw location.

bezel in place. Refer to Figure 612

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-—15

@m
@

FRONT BEZEL

CX—-1253A

Figure 6-12

RAB82 Front Bezel Removal

16. Remove and discard the bezel and filter foam.
17. Gently lift up on the upper chassis assembly to take the weight off the gas spring.

Unlock the gas spring by pulling the locking knob out while still supporting the weight
of the upper chassis assembly. Refer to Figure 6-7.

18. Slowly lower the upper chassis assembly until resistance from the gas spring
is felt.

When resistance is sufficient to ensure the gas spring will allow the logic to close

slowly, release your hold on the upper chassis assembly. Lock in place by turning
the
two cam latches under the front bezel 180 degrees clockwise with a 5/16-inch
allen hex
wrench. Refer to Figure 6-6.

CAUTION
DO NOT permit the upper chassis to free fall and DO NOT force the upper

assembly against the gas spring pressure.

chassis

6—-16

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

If you do not need to remove the HDA, follow the procedures beginning in Section 6.5 to
install the slides and mount the disk drive into the cabinet.

Use the following procedure to prepare the cabinet slide assemblies for mstallatlon
Assemble the left-hand slide assembly first.

Locate the left-hand slide that has part number 1213686-00-REV-X-L engraved on it.
The revision level of the slide was given as X because it changes occasionally. The

letter L indicates this is the left-hand slide.
2.

Locate the plastic bag containing four slide brackets.

Locate the plastic bag containing the 8-32 X 5/16 screws.
4.

Lay the left-hand slide on its back and push the lower half of the slide to the left to gain

access to the rear mounting holes. (Figure 6—13).

Use two 8-32 screws to mount the rear slide bracket to the slide as shown in
Figure 6-13. Don’t tighten the screws all the way since some leeway is needed later
when the slides are mounted into the cabinet.

‘

Use two more 8-32 screws to mount the front slide bracket to the left-hand slide. The
screws must be inserted into the mounting holes through the oval opening on the slide.
Tighten the two screws.

Press the two front leafs of the L-shaped cable retainer together and force the retainer
into the rear end of the left-hand slide assembly as shown in Figure 6-13.

Locate the drive right-hand slide that has part number 1213686-00-REV-X-R engraved
on it. The revision level of the slide was given as X because it changes occasionally.
The letter R indicates this is the right-hand slide.

Lay the right-hand slide on its back and push the lower half of the slide to the right to
gain access (o the rear mounting holes (Figure 6-14).

10. Use two 8-32 screws to mount the rear slide bracket to the slide. Don’t tighten the

screws all the way since some leeway is needed when the slides are later mounted into
the cabinet.
11. Use two more 8-32 screws to mount the front slide bracket to the right-hand slide.
Insert the screws into the slide mounting holes by aligning the oval opening over them.
Tighten the two screws.

Both slides are now prepared for installation into the drive cabinet.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-17

SLIDE
e

10-32
0-32 SCREW

11/16 CABLE
%%%%r(//CLAMP

FLAT

WASHER
10-32 SPACER

L-SHAPED

0.4

CABLE

-32

RETAINER

SCREW
8-32 x 5/16
SCREWS

BACK SIDE

FRONT
SLIDE
BRACKET

LEFT-HAND SLIDE

8-32 x 5/16

SCREWS

REAR
MOUNTING
HOLES

(Crzn—_

|
—

1iiii'

LOWER HALF

J - °
&

—_—

—

REAR SLIDE

(MOUNTS TO
RIGHT REAR

D
‘

BRACKET

()
, PR

;
i

—)

VERTICAL UPRIGHT)

VIEW OF BACK SIDE

SLIDE OVAL OPENING
OVER SCREW HOLES
CX—1009A

Figure 6—13

Preparing Left-Hand Slide

6—18

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

FRONT

SLIDE

BRACKET

SLIDE

8-32 x 5/16

~ CHANNEL

REAR SLIDE

SCREWS

BRACKET

(MOUNTS TO LEFT
REAR

VERTICAL

UPRIGHT)

REAR

- RIGHT-HAND SLIDE

20)

MOUNTING
HOLES
]

N ‘/I

BACK SIDE
|

)

8-32 x 5/16
SCREWS

Figure 6-14

Preparing Right-Hand Slide

6.6 INSTALLING CABINET SLIDES
Use the following procedures to install the slides and assbciafied hardware in the cabinet.

Refer to Table 6-3 for the proper SA482 cabinet installation holes.

CX—-1010A

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

Table 6—-3

SA482 Installation Holes

FRONT
Slide

Holes

REAR Slide

RIGHT REAR=*

LEFT
REAR=*

Holes

Clam p/Standoff

Clamp/Standoff

Drive 3

66, 70

70, 69, 67

Not used

Drive 0

48, 52

52,51, 49

Drive 1

27, 31

31, 30, 28

Drive 2

9,13

13,12, 10

Drive

Position

6-19

* RIGHT REAR refers to the right rear vertical upright as viewed from the front of the
cabinet. LEFT REAR refers to the left rear vertical upright as viewed from the front of the

cabinet.
1.

Go to the rear of the drive cabinet. Counting from the bottom, locate and mark the
mounting holes in both rear cabinet uprights. Refer to Figure 6-15.

Go to the front of the drive cabinet. Counting from the bottom, locate and mark the
mounting holes on both front cabinet uprights.
|

6—20

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

REAR VIEW

;

[o]

o[l

[i Q/Z—_/%\\

HOLE 5

HOLE 2

g
°

S °
.

'-l rr

(FIRST HOLE

ABOVE POWER
CONTROLLER)
CX—2092A

Figure 6-15 - Cabinet Upright Holes (60-Inch cabinet)
3.

Locate the plastic bag containing the 10-32 X 1/2 screws.

Locate the plastic bag containing the four nut bars.

Locate the plastic bag containing two electrostatic discharge (ESD) brackets.

At the front of the cabinet, mount the right-hand slide assembly to the front right cabinet
upright using two 10-32 screws and one nut bar as shown in Figure 6-16. Refer to
Table 6-3.

Secure the back of the slide assembly to the rear frame with 10-32 SEMs screws (Part
Number 90-09700-00). Refer (o Table 6-3 for appropriate hole locations.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-21

Once both slides are mounted, go to the rear of the cabinet and tighten the screws
holding the slides to the slide brackets. Do this for both slides (these brackets were left
loose for adjustments).

6—22

NO.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

FLAT

LEFT REAR

WASHER

VERTICAL UPRIGHT

N\
|®

LD ||

/ WSS
.

[IQ

—~— NUT

BAR

— SLIDE
BRACKET

10-32 x

1/2

SCREW

/Q{

RIGHT FRONT

10-32 x

VERTICAL UPRIGHT

SCREWS

1/2

RIGHT-HAND SLIDE

NUT

SLIDE

BAR

BRACKET

CX—-2093A

Figure 6-16

Mounting the Slide Assembly

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-23

WARNING

Always extend the cabinet stabilizer foot completely forward before placing a drive on
the slides or sliding a drive out of the cabinet.
Also, do not push the stabilizer footin while the drive is extended or damage to the
cabinet interlock mechanism could result.

6.7

MOUNTING THE ADD-ON DRIVE ON THE SLIDES

Use the following procedures to mount the add-on drive on the slides. Refer to Figure 6-17.
CAUTION

The cabinet stablhzer foot must be fully extended and locked (Figure 6—4).

6.7.1 lnstauin'g‘an RAB82 Using a Lifting Device
Use the following procedure if you are using an approved lifting device (DIGH‘AL Pait
Number FC-10074-AC) to install the RA82 disk drive.
1.

Be certain that you have removed the front bezel of the disk drive.

Pull the right and left slides out of the cabinet until they lock in place. Then lift up
the lock arm A on both arms and pull both slides out of the cabinet until they are fully
extended forward. Refer to Figure 6-17.

Lift the drive with the lifting device.
NOTE
|
Since the drive Welghq at least 61.2 Kg (135 peunds), DIGITAL recommends that an
approved field service lifting device rated at 200 pounds (DIGITAL Part Number
FC-10074-AC) be used to place the drive onto the chassis slides.

If an approved lifting device is not available, at least three persons are required to
lift and install the disk drive. Refer to Section 6.7.2 for the proper procedure
The head disk assembly (HDA) may be removed from the drive to reduce the total
weight by approximately 35 pounds Refer to Section 6.16 for instructions on HDA;
removal.

Lower the drive onto the extended slides so the drive flOIlt bezel 1S about one mch
forward of the front end of the slide.
CAUTION
Make sure the drive mounting rails and shdes engage properly. If not, the drive
could fall between the slides.

Push the drive towards the rear of the slide assembly until it engages the top slide stops.

Refer to Figure 6-17.

Insert the 8-32 x 5/16 mounting screws through the openings on each slide to secure

the drive (o the slide assemblies. Only the front screw holes in the drive will be visible.
The slides must be unlocked and moved to expose the rear screw holes. Refer (o

Figure 6-17.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

EP
pa

SLIDE

KEYHOLE

STOP

OPENING

6—24

LOCK ARM B

LOCK ARM A

DRIVE

/ FRONT
LIFTING

/ DEVICE

L MOUNTING
RAIL

STABILIZER

SLIDE

FOOT

ASSEMBLY

~ SLIDE

SCREW

v
CX—-2115A

Figure 6-17

Mounting the Drive on Slides

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-25

Release the slide lock arm B on both slides and push the drive back slowly until the
next drive mounting hole lines up with the keyhole opening in the slides. Refer to

Figure 6-17.

Insert 8-32 X 5/16 screws into the keyhole openings on each slide to complete the

mounting procedure of the drive to the slides.

NOTE
If you have removed the HDA to install the drive into the cabinet, replace the HDA
into the drive at this time (Section 6.17).

6.7.2

Installing an RA82 Without a Lifting Device

Use the following procedure to install an RA82 disk drive without an approved lifting

device. The following procedure requires three people to complete.

WARNING
Fully extend and lock the slides and the cabinet stabilizer foot before attempting this
procedure.

Make certain the work area is clear of obstructions, cables, etc.

Place one person on each side of the unit.

Place one person at the front of the unit.

The two persons at the sides of the unit grasp the front and rear of the unit and using

)]

the leg muscles lift the unit together.

The person at the front of the unit removes the skid or other packaging material from

the immediate area.

The person at the front of the unit guides the lifters and assures that the slides are locked
and that the unit is resting on the slides correctly.

While the two are holding the RA82 in position, the third person starts two mounting

screws on each side of the unit (the one closest to the front and the one closest to the

rear).

Secure the remaining mounting hardware as required and continue with normal
installation procedures.

6.8

SECURE THE DRIVE TO THE TWO ESD BRACKETS

Use the following procedure to attach the drive to the ESD brackets included in the add-on

hardware kit.

Remove the bottom left and the top right OCP mounting screws. Refer to Figure 618
for locations.
Install the 6-32 x 1.375 standoffs (Part Number 90-00001-06) in place of the two screws

removed in step 1.

NOTE
Install the standoffs finger tight. Do not use a wrench.

Install the control panel cover (Part Number 74-34388-01), using the two screws

removed in step 1. The textured surface of the cover should be to the front.

6—26

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

Attach the ESD brackets (Part Number 74-34389-01) behind the vertical flanges on the

logic housing using 8-32 screws (Part Number 90-10174-01) (two brackets, one to each
side, two screws per bracket). Do not tighten these screws. See Figure 6—18.

CONTROL

ESD BRACKET

PANEL

COVER

STANDOFFS

P
/

A
/

Q
Q
N

10-32 SCREWS

g
Q
Q

Q
Q
b

ESD BRACKET

‘\‘ /

LEFT FRONT

VERTICAL UPRIGHT

DRIVE

FRONT

»)

10-32 SCREWS

RIGHT FRONT

VERTICAL UPRIGHT

Figure 6-18

CX—-12918B

SA482 ESD Brackets

NOTE
The ESD brackets also serve as drive retainer brackets.

Release the slide latches and push the drive almost all the way back into the cabinet.
The lower holes on each ESD bracket will line up with a hole on the cabinet upright.
Install a U-nut (Part Number 90-07786-00) in each of these holes. The threaded side of

the U-nut goes to the inside of the upright. Refer to Table 6-3.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-27

Release slide lock arm on both arms to push the drive the rest of the way into the =~

cabinet. Refer to Figure 6-17. Attach the ESD brackets to the uprights using the
10-32
Truss screws (Part Number 9009700-00), one to each side. Tighten the ESD bracket
screws left loose earlier. Refer to Figure 6-18.

If the drive does not slide into the cabinet freely, loosen the front screws

on the
slide brackets and make the necessary adjustments before tightening them again.
Also ensure the slide brackets are mounted in the proper cabinet upright holes
and
that there is enough vertical and horizontal play to allow the drives to
move freely.

Relract the stabilizing foot.

BRACKET

Locate the I/O bulkhead that came with the add-on disk drive (1t should

be attached to the
end of the SDI cable). Based on drive position, each I/O bulkhead must
be mounted in a

designated location on the SDI interface bracket. Using the two captive screws,
mount the
I/O bulkhead to the SDI interface bracket at the rear base of the drive
cabinet as shown in
Figure 6-19.

/0 BULKHEAD
FOR DRIVE

SDI INTERFACE

BRACKET

/O BULKHEAD
FOR DRIVE 3

/O BULKHEAD

FOR DRIVE 0

EXTERNAL

SDI CABLE <:::::;

%\
AN

CONNECTIONS

/0 BULKHEAD /'\L Y

FOR DRIVE 2

L .-

CAPTIVE

MOUNTING

SCREWS
CREW

CAPTIVE

Y INTERNAL
SDI CABLES

CABLE
SHIELD

TERMINATORS

MOUNTING

SCREWS
CX—-685C

Figure 6-19

1/0 Bulkhead Mounting

6—28

6.10

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

INSTALLING CABLE STANDOFF AND U-NUT

Cable standoffs and U-nuts are utilized with cable clamps in the four-high cabinet to hold
the cables away from the rear vertical uprights. The number of cable standoffs to install
depends upon the number of drives in the cabinet.

Use the following procedure to mount each cable standoff and U-nut. Refer to Figure 6-20.
1.

Locate the plastic bags containing the cable standoffs.

Locate the plastic bag containing the U-nuts.

3. Slide each U-nut over the hole of the rear vertica]' upright designated in Table 6-3. The
threaded portion of the U-nut should face the inside of the cabinet.

Screw the standoff into the U-nut.

The SDI cables are installed next.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-29

womm——

—

l|||l|llIIIIIIITTHIIIIIIII"

—

VERTICAL

00 0 00O 0O0O 0O OO O O 0 0

U-NUT —

STANDOFF

U—NUT/

STANDOFF

N
o

_jjflj

(((\vEX
B ') ) > >

—

LTE

U-NUT

// STANDOFF

U-NUT

/ STANDOFF

U-NUT

//STANDOFF

OE_—=

6.11

e STANDOFF

Figure 6-20

U-NUT

%OOOOOOOOF‘OOOOOOOOO

STANDOFF

o 0 0 0 0 0 O

o o @@@/\

UPRIGHT

]

CX—1268A

Mounting U-Nut and Standoffs

INSTALLING SDI CABLES

The 12-foot SDI cable shipped with all add-on drives is the internal cabinet cable that
connects the drive to the I/O bulkhead. The external SDI cable attaches the drive cabinet to
the disk controller in another cabinet.

When installing the SDI cables, you must choose which of the SDI cable installation
procedures in the following paragraphs fits your needs. The first one describes how to
install the SDI cables for the first add-on (bottom cabinet position). The second procedure
describes how to install the SDI cables for the second add-on (top cabinet position).

6-30

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

External SDI cables from the central processing unit (CPU) or controller cabinet are
connected to the inside of the I/O bulkhead (opposite side of the SDI interface bracket
from the internal SDI cables). Refer to Figure 6-19.

6.11.1

First Add-On Drive SDI Cable

Use the following procedure to install the SDI cables for the first add-on drive. Refer to

Figure 6-21. Refer to Figure 6-22 to tie-wrap and route the cables.

6-31

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

& G

"OUT INB A

DRIVE
O

_rl?

DRIVE
1

OUTINB A

SEQUENCE

SLE

POWER

PLUG

4;7 CORDS

DRIVE 2
POWER

—_— CONTROLLER

4o
g3l

SDI

DJa

0OJs

OJe|

DJ1

OJ7

DOus

Ou|

Ou2

Tl il
0J3

m
g

CABLES

[]A

[]B
DA

1/0/

BULKHEAD

, B (]

ADTF

€L

NOTE 1:

ALL PORT A CONNECTIONS GO TO SDI CONTROLLER A. ALL PORT B
CONNECTIONS GO TO SDI CONTROLLER B.

NOTE 2:

HEAVY LINE INDICATES DRIVE SEQUENCE CABLE.
CX—1015B

Figure 6-21

Cable Wiring Diagram (First Add-On RA82)

6-32

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

Install the bottom end of the SDI cable (end with I/O bulkhead) from the first add-on
drive into the SDI interface bracket at the base of the cabinet. Using the two captive
screws, mount the I/O bulkhead in the internal SDI cable position designated for Drive

2 (Figure 6-19). Make sure drive port cable A plugs into the A connector and the port
cable B plugs into the B connector of the I/O bulkhead.
NOTE

Mount the I/O bulkheads on the left side of the SDI interface bracket by turning
them 180 degrees from those on the right side. This should be apparent when the
screw holes are aligned.

Clamp the SDI cables to the cable retainers on the end of the drive slides and the cable
O

standoffs (Figure 6-22).

Starting at the I/O bulkhead, tie-wrap the SDI cables to the vertical upright. Leave
enough slack in the SDI cables so the drive can slide out the front of the cabinet to its
fully extended position. Use as many tie wraps as needed to dress the cables properly.

Extend the cabinet stabilizer foot and then pull the drive out of the cabinet to check if
there is enough slack in the SDI cables. If not, adjust the cable loop size.

This completes the SDI cable installation for the first add-on drive. The sequence cables are
added next.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-33

SDI CABLES

C_JC

)

//
/

)

TIE WRAPS

€
IS

| piskoRrive

ouT

POWER

CORD

STANDOFF/

/ CABLE CLAMP
.

SEQUENCE

CABLE

PLUG

STANDOFF/

11/16 CABLE

VERTICAL

CLAMP

UPRIGHT

w/ CABLE CLAMP
SEQUENCE

4+ casLES

CABLE CLAMP

STANDOFF

STANDOFF/

SEQUENCE

/JH/// M / CABLE RETAINER
|

_— 5

STANDOFF/

CABLE CLAMP

I
S

0
ol

FLAT
WASHER

TJem
[

O
B4l |o

/
CABLE CLAMP

—TT

\
CABLE

RETAINER

STANDOFF/

CABLE CLAMP

—

CABLE CLAMP

I/O BULKHEAD

Figure 6-22

U-NUT
a

SPACER

10-32 SCREW \

CABLE RETAINER

]

SDI INTERFACE
BRACKET

RA82 Cable Routing and Connections

AC POWER CORD

CX—2094A

6—-34

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6.11.2 Second Add-On Drive SDI Cable
Use the following procedure to install the SDI cables for the second add-on drive. Refer to
Figure 6-23. Refer to Figure 6-22 (o tie-wrap and route the cables.
I.

Install the bottom end of the SDI cable (end with I/O bulkhead) from the second add-on

drive into the SDI interface bracket at the base of the cabinet. Using the two captive
screws, mount the I/O bulkhead in the internal SDI cable position designated for Drive
3 (Figure 6-19). Make sure the drive port cable A plugs into the A connector and the B
port cable plugs into the B connector of the I/O bulkhead.
NOTE

Mount the I/O bulkheads on the left side of the SDI interface bracket by turning

them 180 degrees from those on the right side. This should be apparent when the
screw holes are aligned.

Clamp the SDI cables to the cable retainers on the end of the drive slides and the cable

standoffs (Figure 6-22).

Starting at the T/O bulkhead, tie-wrap the SDI cables to the vertical upright. Leave

enough slack in the SDI cables so the drive can slide out the front of the cabinet to its

fully extended position. Use as many tie wraps as needed to dress the cables properly.

Extend the cabinet stabilizer foot and then pull the drive out of the cabinet to check if

there is enough slack in the SDI cables. If not, adjust the cable loop size.

Figure 6-24 shows the wiring diagram for external drives.

This completes the SDI cable installation for the second add-on drive. The sequence cables
are added next (Section 6.12).

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

OUT
&

INB A

? l}i

OUT

SEQUENCE/// d

DRIVE
3

INB A

—
/

fi]
o@o

DRIVE0

OUT INB A
nil | fi] ?

PLUG

6-35

@% N

OUT

DRIVE
1

INB A

==X

N
e )

POWER
//

u@\)

CORDS

DRIVE 2

POWER

OJa

QOus

Ode|

OU7

gzl

OJ7

0OJ8

(?Jz

SDI

;

—1 |

CABLES

iA0
s

Al]

0 ~
Af]
B

BULKHEAD

NOTE 1:

CONTROLLER

ALLPORT
A CONNECTIONS GO TO SDI CONTROLLER A.
CONNECTIONS GO TO SDI CONTROLLER B.
NOTE 2: HEAVY LINE INDICATES DRIVE SEQUENCE CABLE.

—

ALL PORT
B

CX—-1016B

Figure 6-23

Cable Wiring Diagram (Second Add-On RA82)

6—-36

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

EXTERNAL DRIVE

SEQUENCE CABLE

OUT INB A

® ¢ JD ?

SEQUENCE

OUT

| PLUG

DRIVE 3

OUT INB A

INB A

gL
Q=

INB A

OUT

INB A

p[p?

@
v@\; g2}

O
DRIVE

—/

1
DRIVE

SDI CABLES

DRIVE O

o@o

OUT

@) -

[

POWER

CORDS

A;i

DRIVE 2

’

| CONTROLLER ~

7 |

nJa oJ5 0OJ6 ém mgfi

POWER
—_—

Ju)
oJ4 oJs o6 émmmn

POWER

oJ7

CORD

DJ8

0J9|

OJ2

)

1/0
BULKHEAD

SDI CABLES
OA

s’
0A

P 3o

BULKHEAD

BD—J

3 Al

[

“

R iy
T
B[]

NOTE 1: ALL PORT A CONNECTIONS GO TO SDI CONTROLLER A. ALLPORT B CONNECTIONS GO TO SDI CONTROLLER B,

NOTE 2: HEAVY LINE INDICATES DRIVE SEQUENCE CABLE.

Figure 6-24

6.12

CX-1017B

Cable Wiring Diagram - External Drive (Generic)

INSTALLING SEQUENCE CABLE

All RA8X disk drives need drive sequence cables. Sequence cables permit only one drive to
start at a time. The following drive sequence cable procedures assume only RA82s are used
in the cabinet. Refer to Figure 6-22 to tie-wrap and route the cables.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-37

CAUTION
Sequence cables MUST be installed. If not, disk/data corruption or damage may result
during or after a system power failure.

6.12.1

First Add-On Drive Sequence Cable

Use the following procedure and Figure 6-21 to install the sequence cables onto the first
RAB82 add-on drive (Drive 2). This procedure assumes the drives already mounted are RA82

drives.
1.

Install a sequence cable between the IN connector on the back of first add-on drive
(Drive 2) and connect it to the OUT connector on Drive 1.

Tie wrap the sequence cables to the SDI cables, leaving enough slack in the cables so

the drive can slide out the front of the cabinet.
3.

Extend the cabinet stabilizer foot, then pull the add-on drive out of the cabinet to check

if you left enough slack in the sequence cables.
4.

Use as many tie wraps as needed to dress the cables properly.

Be sure cables are not pinched when drive is moved in and out.

6.12.2 Second Add-On Drive Sequence Cable
Use the following procedure and Figure 6-23 to install the sequence cables onto the second
RAB82 add-on drive (Drive 3). This procedure assumes the drives already mounted are RA82

drives.

Install a sequence cable from the IN connector on the second add-on drive (Drive 3) to
the OUT connector on the first add-on drive (Drive 2).

Tie wrap the sequence cables to the SDI cables, leaving enough slack in the cables so
the drive can slide out the front of the cabinet.

[Extend the cabinet stabilizer foot and then pull the add-on drive out of the cabinet to
check if you left enough slack in the sequence cables.

Use as many tie wraps as needed to dress the cables properly.
Be sure cables are not pinched when drive is moved in and out.

6.13

INSTALLING SEQUENCE TERMINATOR PLUG

Check to see if there is a drive sequence terminator plug at the IN connector of Drive . If

it is not, use the terminator plug (Part Number 70-19692-01) that comes in the add-on RA8X
drive hardware kit. Refer to the insert on Figure 6-22.

6—38

6.14

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

INSTALLING DISK DRIVE POWER CORD

The installation of the disk drive power cord varies depending on whether you are installing

the first or second add-on drive. In general, however, power cords are routed with the SDI
cables. This is shown in the fully-loaded cabinet configuration of Figure 6-22.
Route and plug the disk drive power cords from each drive into the receptacles designated

in Figure 6-25. The disk drive power requirements must be equally distributed between the

three phases of the power controller (see Section 6.15). Secure the power cords over the
base of the cabinet with cable mounts and tie wraps as shown.

PHASE DIAGRAM
J4

DD
J7

POWER
CONTROLLER

LABEL

RECEPTACLE

DISK DRIVE

POWER CORDS

MOUNT/
TIE WRAP
CX-1019B

Figure 6-25

Routing the Power Cords on Cabinet Floor (Four-High)

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6.14.1

6-39

Closing the Cabinet

After installing the add-on drive(s) and connecting all cables and power cords,

turn the
circuit breaker for the cabinet to the ON position. Next turn the power ON to the drives.

Replace the rear bustle door (Figure 6-1).

Replace the front panel assembly (Figure 6-2).
Refer to Chapter 2 of this manual and spin up the drives.

6.15

POWER CONTROLLERS

The 881 power controller was developed for the H9646-AH/AJ series cabinets.

It is a

general-purpose, three-phase power controller that controls and distributes
ac power to

various ac devices packaged in an operating system. In addition, both versions
(A and B)
are fully filtered, contain nine outlets, and are packaged in a 3.4-inch enclosure.
For detailed
information and instructions on how to operate the 881 power controller,
refer to the 881
Power Controller User Guide included with this cabinet.
CAUTION
|
The nine outlets on the 881 power controller are divided into three
outlets per phase.
To prevent load imbalance, distribute power to the drives equally between
all three
phases of the power controller. Refer to the appropriate cable wiring
diagram in this
chapter for proper power controller connections.

6.16

HDA REMOVAL

Use the following procedure (o remove the head disk assembly (HDA) from

drive.

the RA82 disk

CAUTION
For drive protection, use a grounding (electrostatic discharge) wrist strap
during the
following procedures (Figure 6-5).
Procedures for access, removal, and replacement of the RA82 HDA

are different from those
of the RA80 or RA81. Refer to the appropriate user guide for the drive you
are working
with.

Unlock the upper chassis assembly by turning the two cam latches under the
180 degrees counterclockwise with a 3/16-inch allen hex wrench (Figure

Raise the upper chassis assembly until the damper (gas spring) lock

kAW

supports the upper chassis assembly (Figure 6-7).

slides in place and

Unplug connector P502 from the read/write module (Figure 6-9).

Unplug connectors P602 and P603 from the HDA preamplifier module (Figure
Place the cable spring assembly in the RELEASED position (Figure

front bezel

6-6).

6-9).

6-10).

Remove the four HDA retaining nuts and washers (Figure 6-9).
Place the positioner lock in the LOCK position (Figure 6-26). The lever
must be lifted

slightly to clear the surface of the read/write module.

CAUTION
The HDA could be damaged if the positioner is not locked.

6—40

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

HAND POSITIONS
FOR REMOVAL

IN LOCK POSITION

“‘v\

Jé

X0 =<

—

— C

Oz
L5+

/ |

\ \

/Q_

4
A

PLASTIC BULKHEAD FEET

CX—-1008A

Figure 6—26

HDA Positioner Lock

Remove the HDA from the drive by lifting it from diagonally opposite corners
(Figure 6-26). The HDA weighs approximately 35 pounds.

Place the HDA on a level surface in the vertical position only. Feet are provided on the
{ront cover of the HDA for this purpose (Figure 6-26).

CAUTION
DO NOT place the HDA in a horizontal position (on the pulley) or the speed and
temperature transducers mounted on the bottom of the HDA could be damaged.

If the HDA is to be moved or packed for shipment, use an HDA spindle pulley lock
(DIGITAL Order Number 74-31667-01) to lock the spindle pulley in place. Any
movement of the spindle could damage the heads.

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6—41

11. Slowly lower the upper chassis assembly until resistance from the gas spring is felt.
When resistance is sufficient to ensure the gas spring will allow the logic to close

slowly, release your hold on the upper chassis assembly. Lock in place by turning the
two cam latches under the front bezel 180 degrees clockwise with a 5/16-inch allen hex
wrench. Refer to Figure 6-6.

CAUTION
DO NOT permit the upper chassis to free fall and DO NOT force the upper chassis
assembly against the gas spring pressure.

Do not pinch cables when lowering the upper chassis assembly. Check cable locations
and reroute cables, if necessary, before lowering.

You may now return to Section 6.5 to continue with the add-on procedure.

6.17

HDA REPLACEMENT (RA82)

If you removed the HDA before installing the add-on drive onto the slides, use the following
procedure to replace the HDA. Refer to the appropriate disk drive user guide if the drive is

an RAB( or RASI.

CAUTION

For drive protection,
use a grounding (electrostatic discharge) wrist strap during the
following procedures (Figure 6-5).

1.
2.

Check that the cable spring assembly is in the RELEASED p"o'sition (towards the rear).

Refer to Figure 6-10.

Position the motor/brake assembly towards front of drive (swing slightly out on pivot
rod) to take (ension off drive belt.

Center the drive belt on the belt ramp bracket on the lower chassis as illustrated in
Figure 6-27.

6—42

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

PIVOT

ROD

MOTOR

PULLEY
BELT
RAMP

BRACKET

CABLE

SPRING
ASSEMBLY

DRIVE

BELT

CX—1020A

Figure 6-27

Belt Alighment

CAUTION
Damage to the HDA or drive belt may result if the drive belt is not aligned
correctly.

Lift the HDA by grasping it from diagonally opposite corners (Figure 6—26). The HDA
weighs approximately 35 pounds.
Lower the HDA over the four mounting bolts (Figure 6-9).

Replace the four nuts and washers holding the HDA to its mounting bolts, and firmly
tighten the four nuts to the mounting bolts with a 7/16 inch nut driver (Figure 6-9).
Connect P502 from the read/write module (Figure 6-9).

Connect P602 and P603 from the HDA preamplifier module (Figure 6-9).

Place the positioner lock in the UNLOCK position (Figure 6-26). The lever must be
lifted slightly to clear the surface of the read/write module.

10. Place the cable spring assembly in the ENGAGED position (Figure 6-10).

INSTALLING RA82 ADD-ON DRIVES IN AN SA482

6-43

11. Position read/write cable between ribs on HDA housing to assure that cable does not get
pinched when cover is closed (Figure 6-9).

12. Gently lift up on the upper chassis assembly (o take the weight off the gas spring.
Unlock the gas spring by pulling the locking knob out while still supporting the weight
of the upper chassis assembly (Figure 6-7).

13. Slowly lower the upper chassis assembly until resistance from the gas spring is felt.
When resistance is sufficient to ensure the gas spring will allow the logic to close
slowly, release your hold on the upper chassis assembly. Lock in place by turning the
two cam latches under the front bezel 180 degrees clockwise with a 5/16-inch allen hex
wrench. Refer to Figure 6-6.
CAUTION

DO NOT permit the upper chassis to free fall and RO NOT force the upper chassis
assembly against the gas spring pressure.

6.18

CHECKING OUT THE DRIVE

After installing the add-on drive, check out the drive using the procedure described in
Chapter 3.

'RA82 ERROR CODES

Table A-1

RA82 LED Error Codes

LED Error Code

Error Name

Spin-up error, spindle motor transducer fimeout

Spin-up e'r’ror,”O-IO(’)O 1/min too slow

Spin-up error, spindle not accelerating

Spin-up error, too long to get up to speed

Spin up is inhibited, GRANT not present or SIP present

Microcode fault

Level-2 SDI command frame sequence e€rror

Level-2 SDI command checksum error

SDI-commafid framing error

SDI-command opcode parity error

Invalid level-Z‘SDI command opcode |

Invalid level-2 SDI command lengfli
Attempt command While drive status error byte is nonzero
|
Invaiid group select error

SDI write enable command while drive is hardware write protected

Slave sent invalid error code

Transfer command while no R/W ready

Transfer command while "drive error”

Failed to achieve fine track after seek

0C
0D

A—2

RA82 ERROR CODES

Table A-1 (Cont.)

RA82 LED Error Codes

LED Error Code

Error Name

Format attempted while format disabled

Iilegal attempt to change 512/576 byte mode

Unable to find first track after guard band

AGC calibration timeout error

Seek or recalibration error during adaptive bias compensation

Seek command contained an invalid cylinder address

AGC calibration out of range

Unit select number changed while on-line

Controller timeout

R/W sectot ofienun error

Spindle motor interlock error

Detent on wrong track after seek

Servo fault |

Spindle speed less than 3420 r/min (3600 less 5 percent)

HDA temperature is too high

Servo temperature >is too high

Invalid error recovery level specified

Invalid subunit ’number specified

Invalid test‘ nfimber specified in diagnose command

Seek or recalibrate command received while spindle not ready

ConUofler flags prohibit‘manual spin up

Run command received while RUN/STOP switch in stop position

Write current and no write gate

Read gate and write gate

Read or write while drive faulted

Write and burst error

Write and write unsafe

-RA82 ERROR CODES =~ A-3

Table A-1 (Cont.)

RA82 LED Error Codes

LED Error Code

Error Name

-36

R/W head short

37 ‘

Write gate and no write current

Read and multi-chip select error

Write and off track

Write and write protect

R/W-HDA-servo-hybrid interlock error

Hybrid-servo interlock error

Hybrid-read/write interlock error

Hybrid-OCP interlock error

Invalid R/W memory region specified

Response timeout error

Seek command received when drive not online

Level-1 SDI command while no R/W ready

R/W safety interrupt with no "cause" bits set

Incorrect TT bit during disconnect command

Invalid write memory offset or byte count

Invalid command during topology mode

Drive disabled by DD bit

Index pulse error

Write and bad embedded

Write or format command received while drive write-protected

SDI transmission/transfer error

Slave diagnostic timeout

Sector/byte counter "count" error

Head select register test error

Faulty hybrid timer

‘Missing index or sector pulse fault

- A—4 'RA82 ERROR CODES

Table A-1 (Cont.)

RA82 LED Error Codes

LED Error Cod.e |

Error Name

R/W teSt, head select error

R/W test, data setup error

Read test, overall failure

Read test, partial failure

R/W test, sector sync timeout error

Read and off track

Write test not executable

R/W test, faulty data detect error

Diagnostic write attempt while write-protected

Internal test cannot run while spindle is spinning

Hybrid ROM consistency fault

SDI wrap test,

SDI wrap test, INIT not received error

SDI wrap test, INIT failed
to clear -

Hybrid RAM test failure on RAM 0

Hybrid ROM 0 checksum error

SDI wrap test, bit stuck in SDI error register

SDI wrap test, SDI transfer error

Hybrid ROM 1 checksum error

SDI wrap test, command available timeout

~SDI wrap test, frame code receive error

SDI wrap test, data byte receive error-

Hybrid ROM 2 checksum error

Hybrid ROMs in wrong sockets -

R/W safety port stuck bit fault

Failed to fault during forced multi-chip. select while reading

Failed to fault during.forced simultaneous read gate and write gate

command available did not reset
-

RA82 ERROR CODES

Table A-1 (Cont.)

RA82 LED Error Codes

LED Error Code

Error Name

Failed to fault during forced write current and no write gate

Failed to fault during forced write gate and no write current

Servo fault during R/W forced fault test

Test completed ok - .

Test does not run due to a drive fault

Hybrid microprocessor bus test error

USART transmit/receive error

No stream test write clock

No stream ECL read clock

No stream buffered servo clock

No stream ECL write data

No stream encoded write data

No stream decoded read data

No stream ECL read data

Stream {lip-flop reset error

Fine track timer error

Fine track status not true error

Fine track status not false error

Fine track over range error

Fine track under range error

Wrong fine track channel detected

PLO error

ADC/DAC reference voltage out of range -

ADC/DAC bit error

ADC/ODAC bit error

Difference counter load error

Difference counter "count" error or incorrect gray code bits

A—-6

RA82 ERROR CODES

Table A-1 (Cont.)

RA82 LED Error Codes

LED Error Code

Error Name

Servo sanity timer error

Head load attempt failed

Outer guard band status error after load

Inner guard band status error after load

Seek into outer guard band failed

Outer guard band false after outer guard band seek

L.oad from outer guard band failed

Spindle not up to speed

Seek into inner guard band failed

Inner guard band false after inner guard band seek

Load from inner guard band failed

Spindle not spinning

Diagnostic seek failed

F.E. diagnostic set up error

Recalibration error

Low velocity seek error

Random seek error

Slave ROM consistency error

Slave ROM 0 checksum error

Slave ROM 1 checksum error

Slave ROM 2 checksum error

Slave ROM 3 checksum error

A diagnostic test is executing

RAM test error on servo RAM 0

RAM test error on servo RAM 1

Non-existent test number specified

Slave load timeout

RA82 ERROR CODES

Table A—1 (Cont.)

RA82 LED Error Codes

LED Error Code

Error Name

Slave sent unexpected méssage

Slave received command packet with checksum error

Slave opcode parity error

Slave received invalid opcode

Master detected checksum error from slave

Slave recalibration timeout

Slave seek timeout

Slave offset timeout

Slave spin-up timeout

Slave spin-down timeout

FC |

Slave send status timeout

Slave speed check timeout

Slave disable embedded servo timeout

A-7/

STATIC CONTROL MATERIALS

Table B-1

Static Control Materials Part Number List

Part Number

Description

29-25435-00

ESD demonstration kit 110V

29-25433-00

ESD demonstration kit 220V

29-11762-00

Velostat FS grounding kit (complete) includes

29-25492-00

10 foot coil cord (for wrist strap)

29-25493-00

Velostat FS work surface

29-25494-00

Insulated alligator clip

29-25496-00

Wrist strap, small

29-25497-00

Wrist strap, medium

29-25498-00

Wrist strap, large

99-07092-01

Static shielding bag, 4 inches x 6 inches L.D.

99-07092-02

Static shielding bag, 6 inches x 8 inches I.D.

99-07092-03

Static shielding bag, 8§ inches x 12 inches 1.D.*

99-07092-04

Static shielding bag, 10 inches x 14 inches I.D.

99-07092-05

Static shielding bag, 12 inches x 18 inches I.D.

99-07092-06

Static shielding bag, 14 inches x 18 inches I.D.%*

99-07092-07

Static shielding bag, 18 inches x 24 inches I.D.

99-07092-08

Static shielding bag, 15 inches x 20 inches L.D.

% Minimum size shielding bag required for read/write module or operator control panel (OCP) module.
%% Minimum size shielding bag required for RA82 hybrid module or servo module.

Index
A

Equipment unpacking (40-inch cabmet),
4-1

AC plug configurations, 3—2
Air filter
cleaning, 2—13
part number, 2-14
reimoval, 2-12
replacement, 2-14

Error codes
|
hybrid led, 2-3
ESD protection, 1-16

B
Backup of data,

1-2

C
Cable retainer, 5-9, 6-16
Circuit breaker
disk drive, 2-11
power controller, 2-7
Customer care, 2—12

Fault codes
front panel, 2-3
Fault indicator, 2-3
Fault switch, 2-3
Files
duplication of, 1-2
reconstruction of, 1-2
Four-high cabinet
actuator assembly, 3-6
cabinet interlock, 3-6
cable standoff installation, 5-23, 6-28
drive mounting, 5-18, 6-23
electrostatic discharge brackets, 5-36

extending drive slides, 3-7
external SDI cables, 3-19

Data backup, 1-2
Diagnostic checkout, 3-20

I/O bulkhead mounting, 5-23, 6-27

front panel removal, 5-1

interlock rod actuator, 5-18
power controller, 5-33, 6-39
power cord installation, 5-33, 6-38
rear door removal, 3—4 |
retracting drive slides, 3-7
sdi cable installation, 5-24
SDI cable installation, 6-29

Diagnostics
internal (drive-resident), 1-8

Diagnostic terminal, 3-21
Diagnostic terminal connector, 3-25
Disk drive subsystem, 1-8
Documentation
related, how to order, 1-18
Drive cabinets, 1-3
Drive description, 1-2
Drive operation
drive power removal, 2-11
spin-down, 2-11
spin-up, 2-11
Drive operation checkout, 3-22

SDI interface bracket, 5-23, 6-27

sequence cable installation, 5-29, 6-36
slide installation, 5-13, 6-18
stabilizer foot extension, 3—4
terminator plug 1nstallat10n 5-32, 6-37
Front panel lamp test 2-3

Drive power-up, 3-21
Drive anit address plug, 3-20

DSA, 1-1
Dual-port, 1-8

General drive information, 1-1

E
Electrical plug configurations, 3-2
Electrostatic discharge (ESD), 1-15

H
HDA, 1-3
HDA removal, 5-6, 6-39

HDA replacement, 5-33, 641
HDA shipping bracket removal, 3-9

Index

Head disk assembly, 1-3

Indicator lights, 2-1
Installation

environmental considerations, 3-1
floor loading, 3-2
heat dissipation, 3-2

site preparation, 3-1
Intemnal drive diagnostics, 1-8
Internal shipping bracket removal, 3-9

Three-high cabinet (cont’d.)
front panel removal, 4-15
T/0 bulkhead connectors, 4-6, 4-26
opening the rear door, 4-5
power cord installation, 4-12, 4-33
removing a drive, 4-34
removing the rear door, 4-5
SDI cable installation, 4-26
sequence cable installation, 4-12, 4-30
sequence cable removal, 4-335
sequence terminator plug, 4-33

slide installation, 4-17, 4-18, 4-20
stabilizer foot extension, 415

Journaling (as method of file reconstruction), 1-2

Unit address plug, 2-5

WRITE PROTect indicator, 2-5
WRITE PROTect switch, 2-5

LED error codes, 2-3
Leveler feet adjustment, 3-2

O
Operator control panel, 2-1
P

Port select switches, 2-6

R
Ready plug and indicator, 2-5
Rear power controls, 2-7

RUN/STOP indicator, 2-2
RUN/STOP switch, 22

S
SA482 cabinet

electrostatic discharge brackets, 6-25

SDI, 1-1
SDI cables
description, 3-16

Sequence cables (description), 3-19
Slide installation (preparation), 5-9, 6-16
Specifications, 1-9
Static protection, 1-16
Subsystem, 1-8
T

Thermal stabilization, 3-1
Three-high cabinet
cable retainer, 4-18
cable standof( installation, 4-26
drive mounting, 4-20

electrostatic discharge brackets, 44
external SDI cables, 4-6

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RA82 Disk Drive User Guide

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