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Document:	RZxx Disk Drive Subsystem Pocket Service Guide
Order Number:	EK-RZXXD-PS
Revision:	003
Pages:	48
Original Filename:

OCR Text

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Part Number: EK-RZXXD-PS.003

Educational Services

HHHE

Po:l)((et gervlrc‘éeGulljdesystem

RZxx

Disk Drive Subsyst

EK-RZXXD-PS-003

October 1991
The information in this document is subject to change
without notice and should not be construed as a
commitment by Digital Equipment Corporation. Digital
Equipment Corporation assumes no responsibility for
any errors that may appear in this document.

Possession, use, duplication, or dissemination of the
software described in this documentation is authorized
only pursuant to a valid written license from Digital or
the third-party owner of the software copyright.
No responsibility is assumed for the use or reliability of
software
on equipment that is not supplied by Digital
Equipment Corporation.
Copyright ©

Digital Equipment Corporation

1991

The following are trademarks of Digital Equipment
Corporation: DECstation, MicroVAX, ULTRIX,
VAXstation, VMS, and the Digital logo.

Contents

introduction

Configurations

Troubleshobtlng

3
4

FRU Procedures

Recommended Spare Parts

Figures
2-1

RZ22 and RZ23 Drive Module
Layout ........cvvivvvii.,

2-2

RZ23L Drive Module Layout e

2-3

RZ24 Drive Module Layout . ..

RZ25 Drive Module Layout .

2-5

RZbb, RZ56, RZ567, and RZ68
Drive SCSI Connectors ...... .

2-7

2-6

RZ73 Drive SCSI Connectors . . .

2-9

3-1

RZxx Troubleshooting
Flowcharts . . ...............

4-1

RZ22 and RZ23 Drive
Module/Frame Removal .......

Contents

4-2

RZb65 Drive Bezel Removal . ..

4-6

4-3

RZb65 Drive Module Removal ...

4-8

RZ56 Bezel Removal .........

4-11

4-6

RZb6, RZb7, and RZ568 Drive

Module or HDA Removal . ... ..
46

Separating the RZ73 HDA from

4-7

Disconnecting the RZ73 Flex

the Drive Module . . .. ... ... ..
Circuit ....................

Tables

4-13

4-156
4-16

2-1

RZ22 and RZ23 Jumpers . ... ..

2-2

RZ23L Jumpers .............

2-3

RZ24 Jumpers ..............

RZ2b5 Jumpers (J6 and J6). .. ..

2-6

RZb65, RZ56 RZb67, and RZ58

Drive SCSIID ..............

2-7

RZ73 SCSI ID Selection.......

2-10

Introduction

The RZ22, RZ23, RZ23L, RZ24, and RZ26
hard disk drives are half-height, high-density,
3.6-inch Winchester disk drives for use with
low-end desktop and workstation systems to
provide random-access data storage/retrieval
capability. The drives are designed to be mounted
horizontally, vertically, and upside-down. The
disk drives have small computer system interface
(SCSI) ability. These random-access rotating
memory devices store data in fixed-length blocks
on 90-mm, thin film, rigid media disks.

The RZ65, RZ66, RZ57, RZ58, and RZ73 hard disk
drives are high-performance 65.26-inch drives. The
drives are designed to be mounted horizontally
or vertically in a system enclosure (such as a
BA213 or BA400) or expansion box (such as the
BA40 or BA42). These random-access rotating
memory devices store data in fixed-length blocks
on 130-mm, thin film, rigid media disks.
The RZ series disk drives conform to the common
command set (CCS). The medium contained within
each RZ series disk drive is a fixed, nonremovable
head/disk assembly (HDA).

1-2

Introduction

Formatted Capacity

RZ22
RZ23
RZ23L,
RZ24
RZ28

62Mb
104Mb
121Mb
209Mb
426Mb

RZ56
RZ66
RZ87
RZ58
RZ78

332Mb
666Mb
1.0Gb
1.3Gb
2.0Gb

Service Strategy

For the RZ23L, RZ24, RZ25, and RZ68 the entire
disk drive is replaced. For the RZ22, RZ23, and
RZb6 disk drives replace the drive module and
then the entire drive option. For the RZ66, RZ57,
and RZ73 disk drives replace the drive module and
then the HDA.
Associated Documents

DECstation 3100 Maintenance Guide
EK-291AA-MG

DECstation 2100/3100 Maintenance Guide
EK-291AB-MG
DECstation 6000 Maintenance Guide
EK-370AA-MG
MicroVAX 3100 Maintenance Guide
EK-A0297-MG
VAXstation 3100 Maintenance Guide

EK-285AA-MG

VAXstation 36xx Maintenance Guide
EK-268AA-MG

Configurations

The RZxx disk drives are not to be internally
terminated. The SCSI bus must be terminated.
Therefore, termination must be done within the
host system itself or expansion boxes. Refer to the
figures in this chapter for the location of the SCSI
ID jumpers.

If you receive a drive or drive module with
the terminator resistor packs installed, use a
needlenose pliers to remove them. The terminator
resistor packs are located just behind the SCSI
port connector.

Refer to the system documentation for information
on the correct termination of the SCSI bus. A brief
list of system maintenance guides can be found in
Chapter 1.

2-1

2-2

Configurations

RZ22 and RZ23 Disk Drives

Figure 2-1

RZ22 and RZ23 Drive Module Layout

80 PIN 8CSI

SIGNAL
CONNEOTOR

e'eJ" [T D

PARITY
JUMPER

[]

\,
O

POWER OCONNECTOR

8EE FOOTNOTE 2 IN TABLE 2-1
OHA_X1141D_60

Table 2-1

RZ22 and RZ23 Jumpers

SCSI ID

0
1
2
3
4
b

Out
In
Out
In
Out
In

Out
Out
In
In
Out
Out

Out
Out
Out
Out
In
In

Out
Out
Out
Out
Out
Out

QOut

Out

E8! is Out

Cut

Eg! is In

1E6 and E6 are present on drive/modules with revision
levels BO2 or higher. Manufacturing use only.

TERMINATOR
PAOKS
8C8I11D
JUMPERS

CONNECTOR TO
HDA MODULE

2-3

Configurations

RZ23L Disk Drive

RZ23L Drive Module Layout

Figure 2-2

CONNECTOR TO
HDA MODULE

TERMINATOR
PACKS

50 PIN SCSI
SIGNAL
CONNECTOR

| -

Q
o
-}
-}

°
o
°
-}
o
o

Q
©

-4
°
°

POWER

cst D

JUMPERS

CONNECTOR
QSF-AX0116-02-DG
SHR-X0188-80

Table 2-2

RZ23L Jumpers

SCSI ID

0
1
2
3
4
5
6
7

Out
In
Out
In
Out
In
Out
In

Out
Out
In
In
Out
Out
In
In

Out
Out
QOut
Out
In
In
In
In

2-4

Configurations

RZ24 Disk Drive
Figure 2-3

RZ24 Drive Module Layout

TERMINATOR

8C8I (D

_—]9 \‘

PARITY

CORNECTOR TO

JUMPER

HDA MODULE

80 PIN 8CS8I
SIQNAL
CONNECTOR

—

0000000000020 D....‘....O

PACKS

JUMPERS

POWER

CONRNECTOR

Table 2-3

RZ24 Jumpers

SCSI ID

0
1
2

Out
In
Out

Out
Out
In
In
Out
Out

Out
Out
Out

3
4
5

6
7

In
Out
In

Out
In

In
In

Out
Im
Im

In
In

‘

BHRA_X11424_09

Configurations

2-5

RZ26 Disk Drive

RZ25 Drive Module Layout

Flgure 2-4

1234565686738

DRIVE
FRONT

loo

600

%
0o

B" ol Js
o

Lol

scsl /o
CONNECTOR

DC POWER

CONNECTOR

]

¢ o

PIN1
O

scs! ID

SELECT HEADER

* SEE TABLE IN TEXT

mkv-r1042-91

2-6

Configurations

Table 24

RZ25 Jumpers (J5 and J6)

SCSI ID (J5)

0
1
2

Out
In
Out

Out
Out
In

Out
Out
Out

4
b
6

Out
In
Out

Out
Out
In

In
In
In

Out

Jumper 2

Out

Spin-up on power-up.

Spin-up on SCSI command.

Note that jumpers 6, 7, and 8 are
always present.

Configurations

2-7

RZ55, RZ56, RZ57, and RZ58 Disk Drives

Figure 2-5

RZ55, RZ56, RZ57, and RZ58 Drive
SCSI Connectors

DRIVE

JUMPER

BHRAR-X0019-00

Table 2-5

RZ55, RZ56 RZ57, and RZ58 Drive SCSI ID

SCSI ID

0
1
2
3
4
b
6
7

Out
Out
Out
Out
In
In
In
In

Out
Out
In
In
Out
Out
In
In

Out
In
QOut
In
Out
In
Out
In

2-8

Configurations

The RZ567 and RZ68 can be set to spin up when
power is applied to the host system. These jumpers
can be seen in Figure 2-6. Note that when the
jumper is removed on the RZ67, the spin up option
is enabled. The spin up option is also enabled
when the jumper is in place on the RZ568. When
the spin up option is disabled, the drive will only

spin up with a SCSI command.

Configurations

2-9

RZ73 Disk Drive

Flgure 2-6

RZ73 Drive SCSI Connectors

REAR VIEW (RZ73 Shown)

=
ey

Power

19 Remots Panelq

fl‘, YT

12v

(Diterertial and Single Ended Conneciors)

210

SCSIID

SCS| Interface
i

SCS| Terminator Reslstor Packs

Single Ended

Resistor Packs
SCS| Terminator
0ocoDND00O0ONODN00ON00000000

NOTE: The three resistor packs must be inserted with

thelr pin1 comectly aligned with the connsetor.
zxud879_occnmeotogo.uege

2-10

Configurations

Table 2-6

SCSI ID

RZ273 SCSI ID Selection

Switch Positions?
1

Out

3
4
53
6
7

Out
In
In
In
In

1
2

Out
Out

Out

Out
In

In
Out
Out
In
In

Out

In
Out

In
Out
In
Out
In

Jumper 13 and 14

Out

Spin-up on power-up.

Spin-up on SCSI command.

1SCSI address 7 is normally assigned to a system
adapter.

Troubleshooting

To troubleshoot an RZxx disk drive, follow the
same basic procedures as for any other disk drive.
Check for the type of failures that are common te a
faulty disk drive.

The RZxx disk drives depend on system-based
diagnostics for troubleshooting. If you are going
to use these diagnostics, make sure that you
adhere to all system configuration criteria such as
loopback connectors.

NOTE
Not all RZxx disk drives will use all of the
troubleshooting flowcharts.

3-1

3-2

Troubleshooting

Check the items in the following list to determine

if the drive is faulty:

Make sure the drive is connected (both power

Make sure there is power to the drive.

Make sure the drive is correctly configured.

and signal cables).

Figure 3-1 shows the logical procedure for

troubleshooting an RZ drive in a system.
NOTE

Check SCSI ID before and after replacmg the
drive module.

NOTE

If the RZ23L and RZ26 disk drives fail replace
the entire disk drive.

Troubleshooting

Figure 3—1

RZxx Troubleshooting Flowcharts

Power
up teest

='|1|

passes

Run system
8C8i dlagnostio
toste

Scsi
dlagnostio test
passes

Reoturn the
system to
oustomer

Replace PCB
and re-run
power up test

:°"":."

PE““

Return to

ovetomer

Run 8CS|
system dlagnostios

Figure 3—1

3-3

Cont'd on next page

B8HRA-X06037A-00

3-4

Troubleshooting

Figure 3-1

(Continued)

RZxx Troubleshooting
Flowcharts

Run system SCSI
dlagnostic tests

Replace FRU and
re-run 8CS8I

dlagnostic teste

8CSI
dlagnostic test
pasees

Replace other FRU and
re-run SCS8I
dlegnoetic teste

Return the
eystem to
customer

scsli
diagnostic test
passes

CALL

SUPPORT

8HRAR-X00306-00

Figure 3-1 Cont’d on next page

Troubleshooting

Figure 3-1

(Continued)

3-5

RZxx Troubleshooting
Flowcharts

Replace PCB
and re-run
8CSI| diag

8csl
diagnostic test

Yes

passes

Return the
to
system

Replace HDA
and re-run

customer

SCS8I| dlagnoatic tests

8Csli
dlagnostic test

Yee

passes

CALL
SUPPORT
8HR-X0040-80

FRU Prgcedures
This chapter describes procedures for removing
and replacing the drive module/frame on the HDA.

CAUTION
Wear a properly grounded, antistatic wrist
strap, available in the Digital antistatic kit
(Part number 29-26246-00), and use care when
handling the drive.
Service Strategy

For the RZ23L, RZ24, RZ256, and RZ68 the entire
disk drive is replaced. For the RZ22, RZ23, and
RZ55, disk drives replace the drive module and
then the entire drive option. For the RZ56, RZ67,
and RZ73 disk drives replace the drive module and
then the HDA.
Set the SCSI ID jumpers to match that of the
replaced drive module or drive.

4-1

4-2

FRU Procedures

RZ22 and RZ23 Disk Drives

Once you have removed the drive from the
system enclosure, position the drive as shown
in the following figure.
Remove the HDA interconnect cable at the
HDA end, not at the drive module/frame end.
Remove the two screws using a 1/16-inch hex
driver.
Hold the drive in your left hand.
With your right hand, push the HDA back
against the rear grommets. Pull the front of
the HDA up and straight out (away from the

drive module/frame).

FRU Procedures

Figure 4-1

4-3

RZ22 and RZ23 Drive Module/Frame
Removal

MODULE

DATA CABLE
TTB_X1236_600
BHA_X1136_00

4-4

FRU Procedures

RZ23L, RZ24 and RZ26 Disk Drives
The RZ23L, RZ24 and RZ25 disk drives are one
piece FRUS.

The name "Generic SCSI Device" can be used
for RZ23L disk drives that are embedded in the
system.

For VMS operating system;
Version 5.4.1 operating system will 1dent1fy
“the RZ23L as a RZ23L diskdnve
Version 5.3.x operating system or earlier will
identify the RZ23L as a "Generic SCSI Device".
At the console prompt type SHOW DEVICE.
This command will perform an inquiry to the
drive and identify the correct ID of the RZ23L
disk drive.

For ULTRIX operating system:;
®

Version 4.1 operating system will identify the
RZ23L as a RZ23L disk drive.
Version 4.0 operating system or earlier will
identify the RZ23L as a "Generic SCSI Device".
At the console prompt type SCSI PB and this
will display the RZ23L as a RZ23L disk drive.

FRU Procedures 4-5

RZ556 FRU Removal and Replacement
NOTE

Do not remove or alter any of the jumpers
on the drive module as this may result in
damage to the drive module or HDA. Set
the SCSI ID jumpers to match that of the
replaced drive module or drive.

To remove the bezel, follow the procedure below:
1.

Position the drive with the module face up,
and turn the drive so the bezel is facing away

from you.

Unplug the LED flex cable.

Hold the sides of the bezel with the palms of
your hands, with your fingers resting on the
front of the bezel. Next, position your thumbs
on the back of the bezel above the locking pins.

Carefully apply outward pressure to the bezel
with your thumbs until the two bezel locking
pins clear the holes in the frame. Note that
the bezel must flex about 1/8 inch to clear the
pins.

While the bezel is flexed, slide it upward until
movement stops (about 3/8 inch). This frees
the upper bezel clips from the upper frame
slots.

Push the bezel away from the drive. This frees
the lower bezel clips from the lower frame
slots and releases the bezel.

4-6

FRU Procedures

Figure 4-2

RZ55 Drive Bezel Removal

LED FLEX CABLE

CONNECTOR

BEZEL CLIPB

TYB_X1040_00

GHR.X0086.00

FRU Procedures

4-7

Once you have removed the bezel from the drive,
follow the procedure below to remove the drive
module:

Remove the screws labeled 1, 2, 3, and 4.

Unplug the spindle motor connector at Jb.

Lift the drive module up and out of the drive.

Unplug the preamplifier cable connector at the
auxiliary board.

Lift the drive module and auxiliary board up
and out of the drive.

Remove the screw and speednut holding the
drive module.

Unplug the auxiliary board from J9 on the
drive module.

Exchange the bad module with the
replacement module, and check the drive
module configuration.

4-8

FRU Procedures

Figure 4-3

RZ55 Drive Module Removal

SPINDLE
MOTOR

CONNECTOR

AUXILIARY

INSULATOR

RZ55

ELECTRONICS
BOARD

‘PREAMPLIFIER
CABLE

CONNECTOR
TTB_X1646_66
SHR-X0084-90

FRU Procedures

4-9

RZ56, RZ57, and RZ58 FRU Removal and
Replacement

Use the following procedure for the two FRUs of a
RZ56 and RZ57 disk drive.
The RZ58 disk drive is a single FRU device.
However, if the customer data is critical use this
same procedure to replace the failed drive module
using the drive module from your spare RZ58-E. If
the failure continues then return the spare drive
module to the spare RZ68-E HDA and replace the
entire failed customer drive.

NOTE

Do not remove or alter any of the jumpers
on the drive module as this may result in
damage to the drive module or HDA. Set
the SCSI ID jumpers to match that of the
replaced drive module or drive.

4-10

FRU Procedures

RZ56, RZ87, and RZ58 FRU Removal and
Replacement (Cont.)

To remove the bezel on the RZ56 only, refer to
Figure 4—4. (The RZ57 and RZ58 disk drives do
not have a bezel.)
Position the drive with the module face up,
and turn the drive so the bezel is facing away
from you.
.

Unplug
the LED flex cable.

Hold the sides of the bezel with the palms of
your hands, with your fingers resting on the
front of the bezel. Next, position your thumbs
on the back of the bezel above the locking pins.

Carefully apply outward pressure to the bezel
with your thumbs until the two bezel-locking
pins clear the holes in the frame. Note that
the bezel must flex about 1/8 inch to clear the
pins.

While the bezel is flexed, slide it upward until
movement stops (about 3/8 inch). This frees
the upper bezel clips from the upper frame
slots.

Push the bezel away from the drive. This frees
the lower bezel clips from the lower frame
slots and releases the bezel.

FRU Procedures

Figure -4

4-11

RZ56 Bezel Removal

LED FLEX CABLE ——_p
CONNECTOR
)

BEZEL CLIPS

8HR-X0003-90

4-12

FRU Procedurses

To remove the module, follow the procedure below:

Lift the drive module up and out of the drive.

Unplug the spindle motor connector at Jb.

Remove the screws labeled 1, 2, 3, and 4.

Unplug the data cable connector at J6.
Exchange the bad module with the
replacement module, and check the drive
- module configuration.

FRU Procedures

Figure 4-5

4-13

RZ56, RZ57, and RZ58 Drive Module
or HDA Removal

B8HR-X0004-80

4-14

FRU Procedures

RZ'73 Removal and Replacement
CAUTION

Do not handle the ISE unless you are wearing
a properly grounded antistatic wrist strap.

When working on the ISE, place it on an

antistatic pad.
CAUTION

Handle the ISE with care. Excessive shock
can cause damage to the HDA.

CAUTION
Do NOT lose the screws or use screws other
than the ones that come with the device

(DEC part number 90-00039-07). Replacement
screws must be the same type and size (6/32 x

1/4" flathead) or the HDA may be damaged.
1.

Remove the four screws securing the drive
module to the HDA.

Carefully separate the drive module from the
HDA, as shown in Figure 4-6. Be sure to lift
the drive module from the end with the DSSI
connector, separating the spindle motor from
its socket on the drive module. Take care not
to stress the flex circuit.

Carefully remove the connector attaching the

flex circuit to the drive module, as shown in
Figure 4-7.

FRU Procedures

Figure 4-6

4-15

Separating the RZ73 HDA from the
Drive Module

MA-X0002-80

FRU Procedures

Disconnecting the RZ73 Flex Circuit

E‘Ju-nD

t:x::cnl:] l

§ oo

00 o AL

]
“aot L

vuu

Figure 4-7

COOTOe

4-16

FRU Procedures

4-17

Replace the faulty FRU and reconnect the flex

Swing the drive module into position over
the HDA and line up the four screw holes in
the module over the corresponding holes in
~ the HDA. Gently apply enough pressure to
seat the pins from the spindle motor into the
spindlesocket on the drive module.

Replace the four screws that secure the drive
module to the HDA., These screws MUST
be tightened firmly, as the drive module is
subjected to vibration when the device is

circuit to the connector on the drive module.

running.

Reattach any mounting hardware and reinstall
the ISE into the enclosure.

Set the SCSI ID jumpers to match that of the
replaced drive module or drive.
CAUTION

Make sure the screws are not touching the
HDA.

Recommended Spare Parts

RZxx Disk Drive Major FRUs
Drive

Part Number

RZ22
RZ23
RZ23L
RZ724

RZ22-E
RZ23-E
RZ23L-E
RZ24-E

RZ26
RZ56
RZ56
RZ67
RZ58
RZ73

RZ26-E
RZ66-E
n/a

n/a
RZ68-E
n/a

ID Jumpers

Part Number

.019 inch
.026 inch

29-28229-01
29-28228-01

Continued on the next page.

5-1

5—2

Recommended Spare Parts

RZxx Disk Drive Major FRUs
HDA

Part Number

RZ22
RZ23
RZ23L

n/a
n/a
n/a
n/a
n/a
n/a
29-27890-01
29-28168-01
n/a
70-28814-01

RZ24
RZ26
RZ56
RZ56
RZb67
RZb68
RZ73

Drive Module

Part Number

RZ22
RZ23
RZ23L

29-27240-01
29-27240-01
n/a

RZ73

54-19110-011
54-19131-012

RZ24
RZ26
RZ56
RZ566
RZb7
RZ568

n/a
n/a
29-27347-01
29-27889-01
29-28159-01
n/a

1Part number accomodates single ended.
2Part number accomodates differential.