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EK-0RA60-UG-1

January 1983

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Document:	RA60 Disk Drive User Guide
Order Number:	EK-0RA60-UG
Revision:	1
Pages:	54
Original Filename:

OCR Text

EK-ORA60O-UG-OO01

'RAG60O Disk Drive
User Guide

Prepared

Educational

Services

of
Digital Equipment Corporation

First Edition, January 1983

The material in this manual is for informational purposes and is subject to c}iange without notice.
Digital Equipment Corporation assumes no responsibility for any errors which may appear in this manual.

Printed in U.S.A.

This document Was set on DIGITAL’s computerized typesetting system.
® Class A Computing Devices:

Notice: This equipment generates, uses, and may emit radio frequency energy. The equipment has been type
tested and found to comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of
FCC Rules, which are designed to provide reasonable protection against such radio frequency interference

when operated in a commercial environment. Operation of this equipment in a residential area may cause
interference in which case the user at his own expense may be required to take measures to correct the
interference.

The following are trademarks of Digital Equipment Corporation, Maynard, Massachusetts:

DEC
DECUS
DIGITAL
Digital Logo
PDP
UNIBUS
VAX

DEChnet
DECsystem-10
DECSYSTEM-20
DECwriter
DIBOL
EduSystem
IAS
MASSBUS

OMNIBUS
0OS/8
PDT
RSTS
RSX

VMS
VT

CONTENTS

Page

CHAPTER 1

INTRODUCTION
RA60 DISK DRIVE DESCRIPTION ......... ... ...
RAG60 DISK DRIVE FEATURES ............................. e

RAG0 OPTIONS . ...
e
RAG60 SPECIFICATIONS ... o e
RA60 RELATED DOCUMENTATION ........ ...,

CHAPTER 2

..
SITE PREPARATION AND PLANNING

[—

< BN
—
EENSLUS
T (O I

o T

T S

S R S A SRS A A SN SR SN SN SN S

3
LaanAb
bR RBRRRWON=C © 2000

e e
e,
..............c.0iiuiinnnn...
Cleanliness ......
...
......
... ... ...
.......
.. e
Floor Loading ......... ... .. . .
Heat Dissipation . .......... ... .. .. . . . . . . i,
Temperature and Humidity ......
... ..
......
... ... ...........
EQUIPMENT UNPACKING AND EXTERNAL INSPECTION ............
RAG60 INSTALLATION CHECKLIST .......... ...,
JOINING CABINET S ...
e e,
INSTALLING LEVELER FEET ....
... .......
... ...
.

e i L TR e

1-1
1-4
1-7

INSTALLATION
INTRODUCTION

1-1
1-1

2-1

2-1
2-1
2-1
2-1
2-1
2-1
2-4

2-4

INSTALL
SDI ING
CABLES

2-10
2-14

RA60 SAFETY LABELS

2-15
2-16

. ... .
i
e e
Installin
the External
g SDI Cables ................................
Internal SDI Cable Installations ......
... ...
......
... ... ... ... ...,

... i,

Safety Label Information ...............
... ... . ... ... i
..
SETTING THE VOLTAGE AND FREQUENCY ........................
REMOVING THE HEAD LOCKING PIN

.........
.. ...
.....
... ......
PROGRAMMING THE UNIT ADDRESS PLUG ........................
REMOVING THE RETAINING BRACKET SCREW ....................
PLUGGING IN THE POWER CABLE .................0 i,
INSTALLING ADD-ON DRIVES ........ P
Removing the Front Filler Panel ............ ... ... ................
Installing the Slide Assembly .........
... ... ... ... ... ... .. .....
Mounting the RA60 Drive on the Slides ...........................
Extending the Driveonthe Slide .................................

Setting the Drive AC Voltage and Frequency

Removing the Head Locking Pin

.......................

.................................

Programming the Drive Unit Address Plug ........................
RA60 CHECKOUT PROCEDURE .....
... ... .. ..... i
Applying Power

. ... ...

Drive Checkout Procedure .....
... .. .......
... ... 00 iiiiununn...
.
Internal Diagnostics ......
..
.. .
...
Subsystem Diagnostics . ...........
.e

iil

2-14

2-16
2-17
2-19
2-20

2-21
2-21

2-22
2-22
2-23
2-25
2-26

2-28
2-28
2-28
2-28
2-28

2-28
2-28

2-29

Page

W N
B
W
e
D

PABRLODDDDNDD
-

W LW W W LW W W ()

APTER 3

OPERATING INSTRUCTIONS

INTRODUCTION
OPERATOR CONTROLS AND INDICATORS ........ ... ..o
it
RUN/STOP Switch and Indicator ................. P
FAULT Switch and Indicator ..............
.. ...
...
UNIT/READY Plug and Indicator ....................ciiiiin...
WRITE PROTect Switch and Indicator ........... ... ... ... .. ....
A and B Port Select Switches ............ e
POWER ON AND POWEROFF ................... e
DISK PACK LOADING AND UNLOADING ............ ..oty
Loading the Disk Pack ......... ... ... i,
... i,
Unloading the Disk Pack .............

3-1
3-1
3-2
3-2
3-4
3-4
3-4
3-5
3-5
3-6
3-8

RUAG60 Disk Subsystem Cabinet ...........
... ...
i,
i,
.....
..
...
...
......
ng
Subsystem
the Disk
Unpacki
t
itt
Ramp CONnStrUCiON .. ... oou vt iin
Side Panels and Joiner Panels .......... .. . i
Opening the Back Door .............
.. .
i, e
Back Door and End Panel Lock Removal ...............
... .. . oot
Side Panel and Bottom Key Button Removal ..............
... ... ... ..

1-2
2-2
2-3
2-5
2-5
2-6
2-7

Joining the Cabinets . ... ... ... ..ttt
Bottom Trim Panel Removal ........ ... ... . . .. i
Installing the Front Locking Bracket ....................... e
Installing the Back Locking Brackets ...............
... ... ...ooiat.
Shipping Bracket Removal ...........
.. ... ...
i il
Leveler Feet Installation . ............
.. i,
Leveler
Feet Adjustments .............coiiniiriiiiininrnrnnnnnnnnn.
External SDI Cable Installation ............
... ..
..
Internal SDI Cable Installation ............
.. ...
iy

RAG60 Safety Labels . ........ ..o,
Removing the Rear Cover and Shield .................
... .. ..
L0,
120V/60 Hz Voltage/Frequency Configuration .........................,
240V/50 Hz Voltage/Frequency Configuration ..........................
Head Locking Pin Removal ...............
... ... .. ..., e
Drive Ready Switch and Unit Address Plug ....................
... .. ...

Removing the Retaining Bracket Screws ...................cccoon... ...

Power Controller
Plugs and Receptacle ..............
... ...... ... .. ...
Removing
Cabinet Filler Panels ..............
... i,
Mounting Chassis Slide to Front Upright ............
... .. .. ... . ...

Mounting Chassis Slide to Back Upright ............
... .. ... ..o iLt.
Extending Cabinet Stabilizer Foot ..............
.. ...
o i i
Mounting
the Chassis Slides ..........
... . i
i,
Extending
the Drive ....... ...
i
ie
Front Panel Controls and Indicators ............
... .. . . iiiiiiinn...
Drive Circuit Breakers . ..... ...ttt i,
Gaining Access to the Disk Spindle ...........
... ... ...
il
RAG60-P Disk Pack Storage Canister ......... ..o,

2-8
2-9
2-10
2-11

2-11
2-12
2-13
2-14
2-15
2-16
2-17
2-18

2-18
2-19

2-20

2-21

2-22
2-23
2-24

2-24
2-25
2-26
2-27
3-1
3-5
3-6
3-7

=]
[¢]

e e

1-3

1-4
1-5

RA60 Environmental Limits Specifications

.............................

1-6

..............
...
iiiiinnininn...

1-6

Indicator Conditions . ..........c..iiin
i
Fault Identification Codes ............
... ...
..

3-2
3-3

RA60 AC Power Specifications

]

RAG60 Disk Drive Perfcnnance Specifications ...................... Ceee
RAG60 Physical Specifications .............
... ... .. ... . . i,

RAGD OpLionS . ...
oot

1
1

0 BN

TABLES

CHAPTER 1
INTRODUCTION

1.1 RA60 DISK DRIVE DESCRIPTION
The RA60 Disk Driveis a removable-media drive with a starage capacxty ef 205 million bytes of 16-bit
word data or 208 million bytes of 18-bit word data. The drive operates on the Standard Disk Interface
(SDI) and may be used on any SDI disk controller.
The disk drive 1s sold with slides and is rack mountable. Up to three disk drives may be mounted into each
cabinet, as shown in Figure 1-1.
|

The RA60 uses a disk pack that comes factory preformatted in either 16- or 18-bit word lengths. Their
part numbers are RA60-P and RA60-PE, respectively.

- Note
The RA60 disk pack formatting information is protected under the copyright laws.
|

1.2 RA60 DISK DRIVE FEATURES

The RA60 has the following features:

A corrected data: error rate of 1 bit in 10 to the 11th power

High data transmission speeds to over 15 megabits per second

A universal power supply for 120/240 volt, 50/60 Hz operation

Drive resident self-diagnostics on power up

An EIA port for field service handheld terminals

Remote error diagnosis capability

Front panel generic fault code display

1.3 RA60 OPTIONS
An RA60 may be purchased separately as an add-on, rack mountable drive with slides and cables. It may
also be purchased as a disk subsystemin cambmatmn with an SDI disk controller. The options currently
available are listedin Table 1-1.

CZ-0870

Figure 1-1

RUAG60 Disk Subsystem Cabinet

Table 1-1

RA60 Options

Options

Description

Add-on Drives

RAG60-AA

One add-on RA60 Disk Drive (50/60Hz 120/240V) with an RA60P disk pack formatted for 16 bit words.

RAG60-AE

One add-on RA60 Disk Drive (50/60Hz 120/240V) with an RA60PE disk pack formatted for 18 bit wqrds.

Cabinet Mounted Drives

RA60-CA

One cabinet mounted RA60-AA Disk Drive (60Hz, 120V, 16 bit format)

RA60-CD

One cabinet mounted RA60-AA Disk Drive (50Hz, 240V, 16 bit format)

RA60-CE

One cabinet mounted RA60-AE Disk Drive (60HZ, 120V, 18 bit format)

RA60-CJ

One cabinet mounted RA60-AE Disk Drive (50Hz, 240V, 18 bit format)

UDAJSO Disk Subsystems

RUAG60-CA

One RA60-CA and a UDASO0 Disk Controller (16 bit format)

RUA60-CD

One RA60-CD and a UDAS5O0 Disk Controller (16 bit format)

RUAG60-EA

One RA60-EA and a UDASO Disk Controller (18 bit format) '

RUA60-ED

One RA60-ED and a UDAS50 Disk Controller (18 bit format)

Add-on drives with add-on UDA50

RUAG60-AA

One RA60-AA add-on drive plus a UDAS0 Disk Controller

RUAG60-AE

One RA60-AE add-on drive plus a UDAS50 Disk Controller

1.4

RA60 SPECIFICATIONS

The RA60 specifications are broken down into four catagories: performance, physical, environmental, and
AC power. These specifications are listedin Tables 1-2, 1-3, 1-4, and 1-5, respectively.
Table 1-2

RAG60 Disk Drive Performance Specifications

Characteristics
Data storage capacity

in 16 bit word format
in 18 bit word format

Head switch latency

Minimum
Maximum

Seek latency

One cylinder seek latency
Maximum seek latency
Average seek latency

Specifications
,

205 megabytes
208 megabytes
10 ms
14 ms

6.67 ms
70.00 ms
41.67 ms

Rotational latency
Disk speed
Maximum latency
Average latency

3600 RPM + 5%
16.66 ms
8.33 ms

Maximum start time

35 sec

Data transfer rate
Bit rate
Bit cell period

15.84 megabits/sec + 5%
63.13 nsec + 5%

Unrecoverable data error rate

1 in 10**12 bits

Recoverable data error rate

1 in 10**7 bits

Corrected data error rate

11in 10**11 bits

Recoverable seek error rate

1 misseek in 10**6

Table 1-3

RAG60 Physical Specifications

Characteristics

Specifications (RA60 Drive Only)

Height

26.52 centimeters
10.44 inches

Width

48.26 centimeters

19 inches

Depth

85.09 centimeters
33.75 inches

Weight (drive only)

68.95 kilograms
152 pounds

Height

106.30 centimeters
41.80 inches

Width

54.20 centimeters
21.30 inches

Depth

14.20 centimeters
36.00 inches

Weight (cabinet only)

90.70 kilograms
200 pounds

Shipping weight
one drive in cabinet

176.42 kilograms
389 pounds

Minimum door entrance
width required
for shipping crate

76.2 centimeters
30 inches

Minimum service
clearance required

Front

91.4 centimeters
36 inches

Rear

91.4 centimeters
36 inches

Left side

No side access needed

Right side

No side access needed

Table 1-4 RA60 Environmental Limits Specification

Characteristic

Specification

Operating ranges:

Temperature

16°C (50°F) to 40°C (104°F )

Temperature rate

20°C/hour (3 6"F/fieur)

of change

Relative humidity

8% to 80% with a maximum wet bulb temperature

of 26°C (78°F) and a minimum dew point of 2°C
(36°F)

Altitude

2438 meters

Air quality requirement

Less than 5 million particles of 0.5 micron per cubic foot of air

8000 feet

Nonoperating rangés:
shipping and storage

Temperature

—40°C (—40°F) to +66°C (+150°F)

Relative humidity

"8% to 80% with no condensation

Altitude

9175 meters
30,000 feet

Table 1-5 RA60 AC Power Specifications

Characteristic

Specification

Voltage/Current

RA60-CA/CE
RA60-CD/CJ

Nominal: 120 volts ac/7.5 amperes
Nominal: 240 volts ac/3.75 amperes

Voltage range/Frequency range

RA60-CA/CE
RA60-CD/CJ

90-128 volts ac/60 + 1 hz

180-256 volts ac/50 + 1 hz

Table 1-5 RA60 AC Power Specifications Cont’d

Characteristic

Specification

Input power

RA60-CA/CE
RA60-CD/CJ

600 watts typical /800 watts worst case
600 watts typical /800 watts worst case

Power factor

Greater than 0.75

Maximum start current

190 amps RMS at 120 VAC for %2 ac cycle
95 amps RMS at 240 VAC for ¥z ac cycle

1.5

RA60 RELATED DOCUMENTATION

g;gexzzl customers may order the following list of RA60 related manuals from the Accessories and Supplies

RA60 USER GUIDE (EK-ORA60-UG)

RA60 SERVICE MANUAL (EK-ORA60-SV)

RA60 FIELD MAINTENANCE PRINT SET (MP-01421)

RA60 ILLUSTRATED PARTS BREAKDOWN (EK-—ORAéO—IP)

RA60 MAINTENANCE GUIDE (AA-M880A-TC)

MAINTENANCE GUIDE LOOSELEAF BINDER (AV-L980A-TK)

UDA5S0 MAINTENANCE DOCUMENTATION KIT (QP904-GZ)*

* This kit consists of a small looseleaf binder, the UDAS0O Maintenance Guide, and the current maintenance guides for disks that operate on the UDASO controller.
Within the United States, DIGITAL customers may order the above manuals from the Accessories and
Supplies Group over a toll free number (800-258- 1710) Orders by mail should be addressed to one of the
following primary distribution centers.
Northeast/Mid-Atlantic Region

Accessories & Supplies Group
Cotton Road
Nashua, New Hampshire 03060
Tel: 603-884-5111

Central Region

Acessories & Supplies Group
1050 E. Remington Road
Schaumberg, Illinois 60195
Tel: 312-640-5612
Western Region

Accessories & Suppies Group
Moffett Park Warehouse
632 East Caribbean Drive
Sunnyvale, California 94086
Tel: 408-734-9125

Outside the United States, consult local DIGITAL offices.

Internal Digital Equipment Corporation customers can order the RA60 User Guide, the RA60 Service
Manual, the RAG60 Field Maintenance Print Set, and the RAG60 Illustrated Parts Breakdown directly
from Printing and Circulation Services, 444 Whitney Street, Northboro, Massachusetts 01532.

The RA60 Maintenance Guide, the Maintenance Guide Looseleaf Binder, and the UDA50 Maintenance
Documentation Kit, can be ordered from the Software Distribution Center, Order Administration/
Processing, 20 Forbes Road, Northboro, Massachusetts 01532.

CHAPTER 2
INSTALLATION

2.1 INTRODUCTION
This chapter describes the procedures necessary for RA60 installations. It includes safety precautions, site
preparation and planning, joining disk cabinets, cabling, and checkout.
Warning
Hazardous voltages are present inside this equipment. Installation and service should be performed
by a qualified and trained service person. Bodily injury or equipment damage may result from incorrect
servicing.
2.2 SITE PREPARATION AND PLANNING
Some site preparation and planning is necessary before installing an RA60 disk subsystem. The paragraphs
that follow discuss some of the things to consider.
2.2.1 Cleanliness
Cleanliness is always an important consideration when working with disk drives. The close tolerances between the read/write heads and the media make disk drives very sensitive to dust or other particulates. The
RA60 1s designed to operate in an office or light industrial environment. The air particulates should not
exceed 5 million particles of 0.05 micron per cubic foot of air.
2.2.2 Floor Loading
The weight of one RA60 in a cabinet is 159.64 kg (352 Ibs). The weight of each additional disk drive is
approximately 68.95 kg (152 lbs). This should not place any abnormal stress on a raised computer room
floor. However, the weight of existing equipment should be considered before installing additional drives.

2.2.3 Heat Dissipation
The heat dissipation of each RA60 is approximately 2730 Btu/hour. To calculate the total heat dissipation
of each drive cabinet, multiply the above Btu/hour by the number of drives it contains.
2.2.4 Temperature and Humidity
The operating temperature range for the RA60is between 10°C (50°F) and 40°C (104°F). The relative
humidity range is between 10% and 90% with a wet bulb temperature of 28°C (82°F).

2.3 EQUIPMENT UNPACKING AND EXTERNAL INSPECTION
Before unpacking a carton, inspect it for external damage. Report any damage to the DIGITAL Field
Service or Sales Office and the local carrier. If no external damage exists, the disk drive may be unpacked
using the following procedure.
l.

Remove the external packing material shown in Figure 2-1.

RAMP

{

LAG SCREW AND NAILS
STAPLED TO RAMP

;

RAMP SUPPORT

§ BLOCK

COVER

SHIPPING

— STRAPS

—CARTON

Q / S'TAFE

REDPAINTED
BRACKET

WOODEN
BLOCK

Figure 2-1

Unpacking the Disk Subsystem

Remove the four shipping bolts that fasten the drive cabinet to the pallet. See insert in Figure
2-1.

Build the ramp to roll the disk cabinet off the pallet. Use the lag screw and nails in the plastic
bag stapled to the ramp. Figure 2-2 shows how the ramp is assembled.
Warning
At least two persons will be needed to perform the
next step of this procedure.

Figure 2-2

Ramp Construction

Remove the four wooden blocks from under the disk cabinet.

Carefully roll the drive cabinet down the ramp.

2.4

RA60 INSTALLATION CHECKLIST

The installation procedure for the RA60 requires the installation of leveler feet and SDI cables. The head
locking pin must be removed and the drives must be set up for the right voltage and frequency ranges.
Also, the drive unit address plug must be programmed, and a shipping retainer bracket must be released. If
cabinets are to be joined, this should be done first. If only one cabinet is being installed, go to Paragraph
2.6.

Use the following checklist to perform the RA60 installation. The list indicates the paragraph number
where each procedure is described.

Joining Cabinets (2.5)

Installing the Leveler Feet (2.6)

Installing the SDI Cable (2.7)

Setting the Voltage and Frequency(2.9)

Removing the Locking Pin (2.10)

Programming the Unit Address Plug (2.11)

Removing the Retaining Bracket Screw (2.12)

Plugging in the Power Cable (2.13)

Installing Add-on Drives (2.14)

Performing Drive Checkout Procedures (2.15)

2.5 JOINING CABINETS
The H9642 AP/AR (120/240 volt) cabinet will hold up to three disk drives. It comes equipped with two
side panels for stand-alone use. If more than three drives are required, a second drive cabinet may be joined
to the first. The H9642 BP/BR (120/240 volt) expansion cabinet comes with a joiner panel and no side
panels. This expansion cabinet may be joined to the first cabinet by removing one of the side panels on the
first cabinet and placing it on the outer side of the expansion cabinet. Figure 2-3 shows the side panel and
joiner panel locations.
Use the following procedure to join disk cabinets.

Open the back door on the cabinet with the side panels by turning the hex lock counterclockwise. |

Refer to Figure 2-4.

JOINER PANEL

SIDE PANELS
Figure 2-3

Cz-0763

Side Panels and Joiner Panels

J——

—

——

JRO—

J—

——————"
RO
——-

BACK DOOR

HEX LOCK
AW

m”;:m

SIDE PANEL
/

C2-0762

Figure 2-4

Opening the Back Door

2-35

Remove the back cabinet door by unscrewing the ground wire from the door and then pull = 20
d o = o o) o e O Ao) O &o)St S el>) fronsi
o)Q S 17
] obel
= o) =
) L-—oO L o)
o)
—- ot O °© sl o) = O = oo = =2> v
o)LA
a4 L oo P o Ly20 o o o v

PULL DOWN ON DOOR LATCH
SIDE PANEL

BACK DOOR

e
s

END-PANEL LOCK

GROUND WIRE

Figure 2-5

(& NAM~0 L
ad

Back Door and End Panel Lock Removal

Loosen the two hex screws that secure the end panel lock to the base of the d IS k cabinet. Then
lift the end panel lock off. Refer to Figure 2-5.

Remove the side panel by lift ing i t vertica lly tod isengage it from the four key buttons on the
side of the cabine t frame. Unscrew the ground wire attached to the side panel. Refer to Figure
2-6.

Install the side panel just removed from the first cabinet on the open side of the expans
= o o8 = a0 the back end panel lock from the expans
QO
')
=
t removed from the first cab ine il eo] R Q L > gO
cabinet. Attach the other end of the ground wire to the side panel be
side panel over the keyhole buttons on the cabinet. Secure the side panel by replacing the end
panel lock. Refer to Figure 2-6.

n <

5DLeOID

Eo—TFe£

=l
)-AQO)t.

3- R oel P©o> 3=wOn

»’'y C

&bfem 4o

Nf. ae

S o2

oLf

Remove the two lower key buttons from the open side of first drive cabinet by removing the
screws in the center of the key buttons. Refer to Figure 2-6.

TOP KEY BUTTONS

GROUND WIRE

'}
—

° BOTTOM KEY
N / BUTTONS

KEYHOLE SLOTS
SIDE PANEL
INSIDE VIEW

REMOVE CENTER SCREW

Figure 2-6

Side Panel and Bottom Key Button Removal

Ccz-0774

Join the two cabinets together as shown in Figure 2-7. Engage the top two key buttons on the
first drive cabinet into the keyhole slots on the expansion cabinet joiner panel. Adjust the cabinets until their fronts are flush.
TOP VIEWS:

JOINER PANEL
—

DRIVE

CABINET

EXPANSION
CABINET

L
KEY BUTTONS

DRIVE
CABINET

EXPANSION
CABINET

DRIVE
CABINET

EXPANSION
CABINET

CZ-0744

Figure 2-7

Joining the Cabinets

Remove the bottom trim panels from the front of the cabinets by removing the two screws at the
base of each. Refer to Figure 2-8.
DISK DRIVE CABINET

TRIM PANEL
BRACKETS

BOTTOM

TRIM PANEL

&
Figure 2-8

CZ-0745

Bottom Trim Panel Removal

Remove the screws that hold the two retainer trim brackets at the point where the two cabinets
are joined. Refer to Figure 2-9.

10.

Place the front locking bracket over the retainer trim brackets. Then bolt the two cabinets together with the existing hardware.

11.

Replace the two bottom trim panels previously removed from the front of the cabinets.

RETAIN%R TRIM BRACKET

FRONT LEFT

| END-PANEL LOCK

FRONT LOCKING BRACKET
CZ-0760

Figure 2-9

Installing the Front Locking Bracket

12.

Open the back doors of the cabinets and loosen the screws that hold the two back end panel locks
at the point where the two cabinets are joined. Slide the locking bracket over the end panel locks
and tighten the four screws. Refer to Figure 2-10.

13.

Replace the back door and any end panel locks removed in this procedure.

2.6 INSTALLING LEVELER FEET
Use the following procedure to install the leveler feet.

Remove the four red shipping brackets and leveler nuts shown in Figure 2-11.

2-10

;

TR LA B B TR
i

Jii

BACK LOCKING BRACKET

LOOSEN 4 HEX SCREWS

BACK END-PANEL LOCK

JOINER PANEL

CZ-0746

Installing the Back Locking Brackets
Ve
L C

Figure 2-10

LEVELER NUT

RED SHIPPING

BRACKET

REMOVE
BOLT

Figure 2-11

CZ—-0566

Shipping Bracket Removal

2-11

Assemble the four leveler feet as shown in Figure 2-12. Screw a leveler foot far enough into the
leveler nut so that it may be slid into place without raising the drive cabinet.

~ LEVELER NUT
FLAT WASHER

LOCK WASHER
HEX NUT

LEVELER FOOT

CZ-0606

Figure 2-12

Leveler Feet Installation

2-12

Slide the leveler nut into the slots in the cabinet as shown in Figure 2-13. Wheel the disk cabinet
to its final location before making the final leveler feet adjustments.

Screw the leveler feet down until they make firm contact with the floor. Adjust the feet until the
drive cabinet is level.

AT
LEVELER e

HEX NUT

LEVELER
FOOT

CZ-0607

Figure 2-13

Leveler Feet Adjustments

2-13

2.7 INSTALLING SDI CABLES
Both the internal and external SDI cables are mounted in the I/O bulkhead. Internal SDI cables connect to
the top of the bulkhead and external SDI cables connect to the bottom.

2.7.1 Installing the External SDI Cables
The external SDI cables coming from the central processing unit (CPU) are connected to the bottom of the

I/O bulkhead. Refer to Figure 2-14. Use the following procedure to install the external SDI cables:
1.

Loosen the two screws holding the I/O bulkhead connector to the bracket.

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

Install the two screws that hold the SDI cable shield terminator in place. Refer to Figure 2-14.

1/0 BULKHEAD
ASSEMBLY BRACKET

—
e

/0 BULKHEAD

CONNECTOR

—

1/0 BULKHEAD

FOR SECOND

ADD-ON

/0 BULKHEAD
FOR FIRST

ADD-ON

SDI CABLES 4‘*
EXTERNAL

MOUNTING
SCREWS

Figure 2-14

External SDI Cable Installation

2-14

CZ-0815

Clamp the external SDI cable to the cable entry retainers below the I/O bulkhead with either a hose clamp or tie wrap.

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

Repeat Steps 2, 3, and 4 for the Port B SDI cable.

Reconnect the 1/0 bulkhead connector to the bracket.

2.7.2 Internal SDI Cable Installation
The two internal SDI cables that exit from the back of the drive connect to the top of the 1/0 bulkhead.
Refer to Figure 2-15. Use the following procedure to install the internal SDI cables:
|

INTERNAL
SDI CABLES <

“SMOUNTING
SCREWS

CABLE SHIELD

TERMINATORS

/0 BULKHEAD

ASSEMBLY BRACKET
I/0 BULKHEAD
CONNECTOR

§
‘

~N—

1/0 BULKHEAD

FOR FIRST

ADD-ON

FOR SECOND
ADD-ON

cZ-0816

Figure 2-15

Internal SDI Cable Installation

2-15

Locate the Port A SDI cable where it exits the back of the disk drive. Plug the end of the Port A
connector on the top of the I/O bulkhead. Note the orientation key on the SDI cable.

Install the two screws that hold the SDI cable shield terminator in place. Refer to Figure 2-13.

Repeat Steps 1 and 2 for the Port B SDI cable.

2.8 RA60 SAFETY LABELS
There are three safety labels on the back of the RA60. Be sure to read these safety labels before installing
an RA60. Refer to Figure 2-16 for their locations.

3R
*

[Fwis oeviceis set
FOR 115V/B0HZ

FAN HOUSING

rcc COMPLIANCE

S— S—

\QUTION: EXTEND STABILIZER FOOT .

correct
voltage setting

(1
(0)

SERIAL NUMBER

cSA______

AUTION: Use

FAN HOUSING

q D—B p
@

SD! CABLES
©
CZ-0812

Figure 2-16

RAG60 Safety Labels

2.8.1 Safety Label Information
Each of the safety labels located on the back of the RA60 is printed in four languages.

Label #1 gives voltage and frequency settings for the drive.

Label #2 is a CAUTION reminder to extend the stablizer foot before pulling the drive out to the
full service position.

Label #3 is a CAUTION reminder to use the correct voltage and frequency settings. Refer to
Paragraph 2.9.

2-16

2.9

SETTING THE VOLTAGE AND FREQUENCY

The RA60 contains a universal power supply that may be used for 120/240 volt ac and 50/60 Hz operations. Use the following procedure to set the voltage and frequency to the correct range.
1.

Remove the rear cover and shield from the disk drive. Refer to Figure 2-17.

REAR COVER

SHIELD

—

VOLTAGE

SWITCH AND
FREQUENCY PLUGS

b’

Figure 2-17

CZ—-0811

Removing the Rear Cover and Shield

2-17

Locate the voltage switch and frequency plugs located on top of the transformer assembly. See
Figures 2-18A and 2-18B.

RED

FREQUENCY
PLUG

WHITE

FREQUENCY

VOLT/

PLUG

Figure 2-18A

veliond

120V /60 Hz Voltage/Frequency Configuration

WHITE
FREQUENCY
/PLUG

RED
FREQUENCY
PLUG

VOLTAGE
SWITCH

CZ-0814

Figure 2-18B

240V /50Hz Voltage/Frequency Configuration

2-18

Place the voltage switch into the needed 120- or 240-volt position. The 120-volt position will
handle an ac voltage range of 90 to 128 volts. The 240-volt position will handle an ac voltage
range of 180 to 254 volts.

Select either 50- or 60-cycle drive operation by installing the red and white frequency plugs in
one of the configurations shown in Figure 2-18A or Figure 2-18B.

Leave the rear cover and shield off the drive to remove the head locking pin described in the

next paragragh.

2.10 REMOVING THE HEAD LOCKING PIN
The head locking pin is used to lock the head assembly in place during shipment. It must be removed
before the read/write heads can move. Assuming that the rear cover and shield have been removed to
perform the voltage settings above, pull the head locking pin out of its locking hole on the positioner assembly and put it in the storage hole. Refer
to Figure 2-19. Replace the rear cover and shield when this operation is completed.
HEAD LOCK PIN SHOWN
IN SHIPPING AND LOCKING
HOLE

PIN STORAGE }—|
HOLE

ENGINEERING TEST

_—"]

- PIN LOCKS HEADS

HALFWAY ouT

Qal

POSITIONER
ASSEMBLY

—
Figure 2-19

Head Locking Pin Removal

2-19

CZ-0821

2.11

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 from 0 to 254 can be programmed into this plug. To set the drive unit number,
remove the READY swtich cap from the control panel and cut off the tabs that add up to the

required number.

Figure 2-20 shows the binary value represented by each tab.

If you wish to set a specific drive to a unit number of 7, for example, cut tabs 1, 2, and 4
off the switch cap.

After the drive unit number has been selected, place the gummed label with the corresponding

number in the recessed area of the READY switch cap and replace the cap on the drive.

4 ReapyY

READY INDICATOR LAMP

AND MICROSWITCH CONTACTS

—

_ //C;M»CODED

SWITCH CAP

LOCATOR
PIN

REAR PIN CONFIGURATION

Figure 2-20

Drive Ready Switch and Unit Address Plug

2-20

CZ-0576

2.12 REMOVING THE RETAINING BRACKET SCREW
A retaining bracket will be found on the back of all disk drives shipped in a cabinet. This retaining bracket
serves to keep the drives from sliding out of the cabinets during shipment. Once at the customer site, the
screws securing the drive to this retaining bracket must be removed as follows.

Open the back door of the disk cabinet by turning the hex lock clockwise.

Loosen the retaining bracket captive screws shown in Figure 2-21.
BACK VIEW OF DRIVE
o

'e)

2
5

:\LGOSEN CAPTIVE
|~ SCREWS FROM

RETAINING

@ .

BRACKET

o
Lo}

°©

O
o

)

[»)

pus
Ccz-0824

Figure 2-21

Removing the Retaining Bracket Screws

2.13 PLUGGING IN THE POWER CABLE
The power cables from each disk drive are already plugged into the power controller at the base of thedrive
cabinet. Only the ac power cord from the power controller needs to be plugged into an external power
source. Figure 2-22 shows the power plugs and receptacle types that are used in this power controller.
Access to the power cord is gained through the back door of the disk cabinet. Do not switch on the circuit
breaker on the power controller until you reach the drive checkout procedure.

POWER CONTROLLER
AT BASE OF CABINET

POWER CONTROLLER
PLUG

RECEPTACLE

PLUG

SOURCE

—

Wo—

120V

L5-30R
12-11194

NEMA L5-30P
DEC 12-11193
X

240V

20A
)
1-PHASE

s | 2610

1-PHASE

HUBBEL

2321

Y
y

NEMA L6-20P
DEC 12-11192

2320

0
.

L6-20R
12-11191
Cz-0823

Figure 2-22

Power Controller Plugs and Receptacles

2.14 INSTALLING ADD-ON DRIVES
.
In its minimum configuration, the RA60 subsystem comes with only one disk drivein a cabinet. Use the
following procedure to install a second or third drivein a cabinet.
Caution
Because of the weight of the disk drives, do not try
to complete the add-on installation without the help
of a lifting device.
2.14.1 Removing the Front Filler Panel
The first add-on drive should be placed in the center bay of the cabinet and the second in the bottom bay.
Remove the filler panel at the proper location by unscrewing the four 10-32 hex nuts that hold it to the
cabinet frame. These nuts can be reached through the back of the cabinet. Refer to Figure 2-23.

Joroooevoveovoovovosoevovoosevonoocvocvoocy

FILLER
PANEL

CZ-0577

Figure 2-23

2.14.2

Removing Cabinet Filler Panels

Installing the Slide Assembly

Each RA60 add-on must be mounted in the drive cabinet on a slide assembly. Use the following procedure

to install the slides on the drive cabinet.

Find the left and right chassis slides. (Slide brackets are already attached.)

Set aside the following hardware:

Eight Phillips head sems screws - 10-32 X 1/2 inch

Four nut bars

Mount the chassis slides to the front vertical upright as shown in Figure 2-24. If this is a first
add-on drive (middle drive ), use mounting holes 26 and 29, counting from the bottom. If this is
a second add-on drive (bottom drive), use mounting holes 8 and 11, counting from the bottom.

Mount the chassis slides to the back vertical uprights as shown in Figure 2-25. Use the same
mounting holes as specified in Step 3 above.

VIEWED FROM FRONT OF CABINET

NUT
BAR

CABINET FRONT

CHASSIS SLIDE

3®eeder

LEFT UPRIGHT

PHILLIPS HEAD SEM SCREWS
10-32 x 1/2"

NOTE:

1. REPEAT FOR FRONT RIGHT UPRIGHT.
CZ-0822

Figure 2-24

Mounting Chassis Slide to Front Upright

VIEWED FROM FRONT OF CABINET

PHILLIPS HEAD

SEM SCREWS
10-32 X 1/2"

CHASSIS
SLIDE

NUT

BAR

";fi
-1

()]
®

]

S
{1e

@®

LEFT BACK

VERTICAL UPRIGHT

L~
NOTE

REPEAT FOR RIGHT BACK VERTICAL UPRIGHT.

Figure 2-25

CZ-0749

Mounting Chassis Slide to Back Upright

2-24

2.14.3 Mounting the RA60 Drive on the Slides

Use the following procedure to mount the drive on its slides.

Extend the stabilizer foot as shown in Figure 2-26.

STABILIZER FOOT

"4
Figure 2-26

CZ-0608

Extending Cabinet Stabilizer Foot

Caution
Failure to pull out the stabilizer foot may cause the
drive cabinet to tip over when the disk drive is fully
extended to its service position.

Extend each chassis slide all the way forward until it locks (Figure 2-27).
Warning

Because of the weight of the disk drive, a lifting device will be needed to place the drive on the chassis
slides.
»

With the help of a lifting device, place the drive on top of the chassis slides as shown in Figure
2-27. Push the drive toward the back of the slides until the mounting rails touch the stop.

Fasten the drive to the chassis slides using five 8-32 X 1/4 inch Phillips pan head screws, as
shown in Figure 2-27.

2-25

Figure 2-27

2.14.4

Mounting the Chassis Slides

Extending the Drive on the Slide

The slides on the RA60 have a restraint mechanism which prevents the drive from being fully extended
inadvertently. To slide the drive all the way forward use the following procedure.
1.

Extend the stabilizer foot as show in Figure 2-26.

Extend the drive until restraint mechanism engages. Refer to Figure 2-28.

Insert a flat-bladed screwdriver under{f:he restraint lever lock, and push the lock toward the back

of the slide. Refer to Figure 2-28.

Push down on the restraint lever and extend the drive to the service position. Refer to Figure
2-28.
|

After completing service on the drive, be sure to re-engage (lock) the slide restraint mechanism.
Caution
Make certain that the restraint locks are fully engaged so the drive cannot be pulled to the full service
position inadvertently.

DRIVE IN
OPERATOR
POSTION

—

[E5) s

PUSH LOCK

RESTRAINT

LEVER LOCK

SLIDE RESTRAINT
LEVER

PULL DOWN

LEVER
STABILIZER FOOT

.t
Figure 2-28 Extending the Drive

CzZ-0813

2.14.5 Setting the Drive AC Voltage and Frequency
The RA60 Disk Drive contains a universal power supply that may be used for 120/240 volt ac and 50/60
Hz operations. The only requirement is that you preset the voltage and frequency to the desired range.
Refer to Paragraph 2.9, and to Figures 2-17, 2-18A, and 2-18B to perform this procedure.

2.14.6

Removing the Head Locking Pin

The head locking pin is used to lock the head assembly in place during shipment. Refer to Paragraph 2.10
and Figure 2-19 to perform this procedure.
2.14.7 Programming the Drive Unit Address Plug
The READY switch cap on the operator control panelis also the drive unit address plug. A drive unit
number from O to 254 can be programmed into this plug. To properly program the drive unit address plug,
refer to Paragraph 2.11 and Figure 2-20.
2.15

RA60 CHECKOUT PROCEDURE

Use the following checkout procedure after installing each RA60.
2. 15 1

Applying Power
Verify that the ac circuit breaker on the power control unit is off. Also verify that the circuit
breaker on each disk driveis off.

If thisis an add-on drive, plug the RA60 power cord into the ac power outlet on the power
control unit at the bottom of the cabinet.

Plug the ac power cord from the power control unit into an external ac receptacle.

Switch on the ac circuit breaker on the power control unit.

2.15.2 Drive Checkout Procedure
The following procedure is uséd to check out each RAG60.

Caution
This checkout procedure should be used only by
trained maintenance personnel.

Verify that the head locking pin has been removed (Paragraph 2‘10).

Verify that the voltage and frequency has been properly set (Paragraph 2.9).

Switch on the ac circuit breaker on the RA60.

Open the front cover on the RA60 by pushing in the latch release on the front of the drive.

Load the disk pack on the RA60. Refer to Paragraph 3.4.1.

Press the RUN/STOP switch on the front of the RAG60.

2.15.3 Internal Diagnostics
Run the six internal diagnostics to check out the status, recalibrate, and seek capability of the RA60. Refer
to Chapter 3 in either the RA460 Service Manual or the RA60 Maintenance Guide for instructions on
running these diagnostics.

2.15.4 Subsystem Diagnostics
Run the following diagnostics when the RA60 is connected to a PDP-11 system.

CZUDCCO (UDA and Disk Drive Diagnostic)
Run the following diagnostics when the RA60 is connected to a VAX system.
ZZ-EVLRA (UDAS5O Disk Subsystem Diagnostic)

CHAPTER 3
OPERATING INSTRUCTIONS

3.1 INTRODUCTION
This chapter explains the RA60 operator control panel and tells how to remove and replace disk packs,
power on, and spin up the disk.

3.2 OPERATOR CONTROLS AND INDICATORS

The RA60 operator control panel is located on the front of the disk drive. It consists of five switches and
one logic plug (UNIT/READY). See Figure 3-1. Covering these controls are six indicator caps labeled as
follows:
|
|
e

RUN/STOP

FAULT

UNIT/READY

WRITE PROTECT

A Port

B Port

Under each indicator cap is a light that can be on or off regardless of the switch position. Table 3-1 lists the
conditions that affect the indicator lights. The function of each switch is explained in the following paragraphs.
PORT A

Uasssg rs:wgggmc

SWITCH AND INDICATOR

FAULT INDICAT

RUN/STOP

(RED)

SWITCH AND INDICATOR
(YELLOW)

(WHITE)

READY

WRITE-PROTECT

INDICATOR
(WHITE)
N

N
RN

PORT B

SWITCH AND INDICATOR \ SWITCH AND INDICATOR
(YELLOW)
(WHITE)
§

N
frauLt]

[ Jreaoy] [WRITH |
PROT

}
B

CZ2-0422

Figure 3-1

Front-Panel Controls and Indicators

3-1

Table 3-1

Indicator Conditions

Indicator

Off

RUN/STOP

When disk is turning

When disk has stopped

FAULT

When drive detects a
fault

When no faults are
detected

When drive is on-

When drive can not
process host requests

READY

cylinder and ready
to process host
request.(RUN light
must be on.)

or 1s not on
cylinder.

WRITE
PROTect

When drive is
physically or
logically write
protected.

When drive is
write enabled.

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.

3.2.1 RUN/STOP Switch and Indicator
The RUN/STOP switchis a double-action push button. When placedin the RUN position (button in), the
switch requests that the disk spin up and load the heads. When placedin the STOP position (button out),
the heads are unloaded off the disk and the spindle motor is stopped. The RUN/STOP light always reflects
the physical state of the disk spindle. When the light is on, it indicates that the disk spindle is spinning.
When the light is off, it indicates that the disk spindle is stopped.

If the drive is on line and operating when the switch is placed in the STOP position, the drive will complete
all outstanding write operations commanded by the controller before spinning down.
If the RUN/STOP switch is in the IN position when power is applied to the drive, it will have to be reset by
releasing it and pushing it in again to start the spin-up sequence.
3.2.2

FAULT Switch and Indicator

The FAULT switch and indicator performs a dual function. When the FAULT light is off, the FAULT
switch can be pushed to perform a lamp test. When the FAULT light is on, it indicates that an error
condition exists within the RA60.

When the disk drive detects an error, the FAULT light comes on, and the drive stays in its current operating state until the condition is corrected. Some faults may be corrected automatically upon receipt of a
DRIVE CLEAR command. The FAULT light will go off when this occurs. If the fault condition is not
corrected automatically, the FAULT light will stay on, and the FAULT button will have to be pushed. If a
fault occurs during a spin-up try, the spin-up will be aborted.

3-2

The FAULT button is a momentary contact switch. When pushed the first time, the switch causes the
drive to enter an off-line state relative to the controller. In this state, the drive assumes control of all frontpanel indicator lights which blink to display a binary code indicating the type of fault. Table 3-2 shows the
hex fault codes that can be displayed by the front-panel indicators.

The blinking fault code will remain displayed until an attempt is made to clear the fault by pushing the
FAULT switch a second time. When the FAULT switch is pushed the second time, the drive tries to clear
the fault condition. If successful, the FAULT light will go off and the drive will return to the available
state. If unsuccessful, the FAULT light will remain on until the drive is repaired.
Table 3-2 Fault Identification Codes

Description
of Error

~ RUN
STOP

FAULT

READY

WRT
PROT

HEX
Code

Microcode
error (not
sent to

front panel)

off

Heads home
switch fault

off

of f

off

of f

time fault

of f

off

Bad servo
samples fault

off

Bad velocity
fault

off

Linear mode
fault

off

of f

off

samples fault

off

of f

off

Heads home
switch would
not open

off .

of f

off

Front panel

fault

Long spin-up

Retry on seek

fault

Lost servo

* The run/stop switch may be on or off depending on the state of the drive.

Table 3-2 Fault Identification Codes (Cont.)

Description
of Error

~ RUN

WRT

STOP

FAULT

READY

PROT

fault

SDI fault

Invalid SDI
level 1
command

HEX
A

Code

off

- off

off

Master

processor

Master
processor

fault

* The run/stop switch may be on or off depending on the state of the drive.
3.2.3 UNIT/READY Plug and Indicator
The plastic cap labeled READY is both an indicator cap and a removable unit address plug. The READY
light will come on after the RUN/STOP switch is pushed in and the drive has completed a successful
spin-up sequence. The drive is ready to accept read and write commands whenever the READY light is on.
The READY light will go off when the drive is performing seek operations.
The plastic READY cap is cam-coded to distinguish one drive from another in multi-drive arrangements.
This unit address plug determines the logical number that this drive presents to the host. Only numbers

between 0 and 251 may be programmed into this unit address plug to satisfy the requirements of the Mass
Storage Control Protocol. The procedure for programming the unit address plug may be found in Paragraph 2.11 and Figure 2-20 of this user guide.
3.2.4 WRITE PROTect Switch and Indicator
The WRITE PROTect switchis a double-action push button with a built-in indicator light. Pushin the
WRITE PROTect switch to place the drivein write protect mode and turn on the WRITE PROTect light.
In this mode, the write circuits of the disk drive are disabled.
Release the WRITE PROTect switch (OUT position) to enable the write circuits and turn off the WRITE
PROTect light.
3.2.5 A and B Port Select Switches
The RA60 has two port select switches. These double-action switches (A and B) have built-in lights that
indicate which drive port is presently on-line to the controller. Pushin the A port switch to make the drive
available to a controller through port A. Pushin the B port switch to make the drive available to a controller through port B. When both port switches are pushedin, the drive will operate in the dual-port programmable mode where either controller may access the drive when it is not busy. When both switches are out,
the driveis not available through either port.

The ON/OFF conditions of the port indicator lights do not always follow changesin switch positions immediately. For example, if the driveis on-line to controller A, the A port hght will be on. If the switches are
then reset for access to controller B, the A light will stay on until the driveis actually on-line to controller B.

3-4

3.3

POWER ON AND POWER OFF

Power to the disk drive is controlled by two circuit breakers. One circuit breaker is on the power controller
at the base of the cabinet, and it controls power to all drives in that cabinet. The other circuit breaker ison
the back of each disk drive. These two circuit breakers should normally be leftin the ON position after
drive installation. If both of these circuit breakers are on, the drive will spin-up whenever the RUN/STOP
switchis pushed. Refer to Figure 3-2.

DRIVE CIRCUIT
BREAKERS

POWER CONTROLLER
CIRCUIT BREAKER

CZ-0818

Figure 3-2

Drive Circuit Breakers

If the RUN/STOP switchis in the IN position when power is applied, it will have to be reset by releasingit
and pushing it in again to start the spin-up sequence.

To remove power from a drive, open the back door of the disk cabinet by turning the hex lock clockwise.
Switch off the circuit breaker on the back of the selected drive. If you wish to remove power to all disk
drives, switch off the power controller circuit breaker.
3.4 DISK PACK LOADING AND UNLOADING
|
The RA60 must be loaded with an RA60 disk pack and then be brought to the ready state before information can be stored or read. The procedures for loading and unloading the disk pack are as follows.

3.4.1 Loading the Disk Pack
|
Use the following procedure to load the disk pack.
1.

Apply power by turning on the drive circuit breaker located at the back of drive.

Make sure that the RUN light is off (RUN/STOP switch is not pushed in).

Push the release button to raise the front cover. Drive power must be on to operate the cover
release button. Refer to Figure 3-3.
V

FRONT COVER

DISK SPINDLE

DISK SHROUD

READ/WRITE
HEADS

COVER RELEASE
BUTTON

~
Figure 3-3

CZ-0820

Gaining Access to the Disk Spindle

Look into the disk well to make sure that the read/write heads are retracted from the disk

shroud area. Failure to make sure that the heads are fully retracted could cause damage to the
heads and/or the disk pack.
Remove the bottom dust cover from the disk pack canister by squeezing together the two slide
buttons on its underside. Avoid placing fingerprints on the exposed disks inside the canister.
Refer to Figure 3-4.

DISK PACK
HANDLE

DISK PACK
CANISTER

BOTTOM DUST
COVER

SQUEEZE THESE TWO
SLIDE BUTTONS IN
TO REMOVE BOTTOM
DUST COVER

CZ-0819

Figure 3-4

RAG60-P Disk Pack Storage Canister

Lifting the canister by its handle, set the pack onto the disk spindle.
Using one hand to turn the handle while holding the disk pack cover stationary with the other,
rotate the pack handle clockwise until it stops turning. Give one last, firm twist to the handle and
lift the storage canister off the pack.
Close the front cover of the disk drive.
Push in the RUN/STOP switch and wait for the READY light to come on. The disk drive is
then ready to accept read and write commands.

3.4.2 Unloading the Disk Pack
Use the following procedure to unload the disk pack.
1.

Release the RUN/STOP switch and wait for the RUN light to go off.

Push in the release button and raise the front cover.

Place the storage canister over the disk pack so that the post protrudmg from the center of the
disk pack contacts the canister handle.

4,
5.

Using one hand to turn the handle and the other to hold the disk pack statienary, rotate the

canister handle counterclockwise until the pack is free of the spindle.

Using the canister handle, lift the pack out of the disk drive and close the front cover.

Install the bottom dust cover on the base of the storage canister by pressing it on gently until it
locks into place.

;

RA60 Disk Drive

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EK-ORA60-001

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