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EK-TF857-UP-002

April 1992

33 pages

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Document:	Upgrading the Tx800 Series Magazine Tape Subsystem
Order Number:	EK-TF857-UP
Revision:	002
Pages:	33
Original Filename:

OCR Text

Educational Services

Upgrading the TX800 Series
Magazine Tape Subsystem
EK–TF857–UP–002

Digital Equipment Corporation

First Edition, April 1991
Second Edition, August 1992
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.
Copyright © Digital Equipment Corporation 1991, 1992
All Rights Reserved.
Printed in U.S.A.
FCC NOTICE: The equipment described in this manual 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: CompacTape, DSSI, TK, VAX, VMS, and the
DIGITAL logo.

Contents
vii

Preface
1

Getting Started
1.1

Upgrade FRUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1

1.2

TF857 Upgrade Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1

1.3

TZ867 Upgrade Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–2

1.4

Upgrade Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–3

Removing and Replacing the Controller Module
2.1
Warm Swap Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1
Collecting and Recording Original Controller Module Parameters . . . . . . . .
2.1.1.1
Using the ANALYZE/SYSTEM Command . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1.2
Using the SET HOST/DUP Command . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.2
Removing the Controller Module Assembly from a TF837 Subsystem . . . . .
2.1.3
Removing the Controller Module Assembly from a TZ857 Subsystem . . . . .
2.1.4
Preparing the Module Tray for the TF857 Subsystem . . . . . . . . . . . . . . . . . .
2.1.5
Unpacking the TF857 Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.6
Installing the New Controller Module for the TF857 Subsystem . . . . . . . . .
2.1.7
Preparing the Module Tray for the TZ867 Subsystem . . . . . . . . . . . . . . . . . .
2.1.8
Unpacking the TZ867 Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.9
Installing the New Controller Module for the TZ867 Subsystem . . . . . . . . .

2–1
2–1
2–2
2–3
2–3
2–4
2–10
2–10
2–10
2–13
2–13
2–14

Removing and Replacing the Drive
3.1

Removing the TK71 or TK85 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1

3.2

Installing the TK85 or TK86 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6

iii

iv Contents

Verifying the Upgrade

Figures
2–1
2–2
2–3
2–4
2–5
2–6
2–7
2–8
3–1
3–2
3–3
3–4
3–5
3–6

Operator Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
TFK70 DSSI Bus Controller Module Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–6
Identifying the Cables of the Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7
Locating the DSSI ID Switch on the TFK70 DSSI Controller Module . . . . . . . 2–8
Locating the DSSI ID Switch on the New Controller Module . . . . . . . . . . . . . . 2–9
The Loader Transfer Assembly Communications Cable Rerouted . . . . . . . . . . . 2–11
Installing the New Controller Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
Rear of the TF857 Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–13
Mechanical Stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Loader Open Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
Captive Screws for Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
Plastic Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5
Handle Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7
Captive Screws for Controller Module Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–8

Preface
Manual Structure
Chapter 1, Getting Started, describes the field replaceable units that you need to remove and
replace for upgrading the TF837 and TZ857 subsystems. It provides a contents list of the TF857
and TZ867 upgrade kits. Chapter 1 also discusses guidelines to follow during the removal and
replacement procedures.
Chapter 2, Removing and Replacing the Controller Module, describes how to remove the
controller module from the each subsystem and replace it with a new controller module.
Chapter 3, Removing and Replacing the Drive, describes how to remove the tape drive and
replace it with the new tape drive.
Chapter 4, Verifying the Upgrade, describes how to verify the TF857 or TZ867 upgrade.
For more information, see the applicable document:
•

TF837 Magazine Tape Subsystem Owner’s Manual (EK–TF837–OM)

•

TF857 Magazine Tape Subsystem Owner’s Manual (EK–TF857–OM)

•

TX867 Magazine Tape Subsystem Owner’s Manual (EK–TX867–OM)

Intended Audience
This manual is for Digital Services field engineers. If a customer performs this
upgrade, and a problem occurs, it could interfere with the customer’s warranty.

Conventions
The following are the product terms used in this manual:
•

TF837 subsystem refers to the TF837 magazine tape subsystem

•

TF857 subsystem refers to the TF857 magazine tape subsystem

•

TZ857 subsystem refers to the TZ857 magazine tape subsystem

•

TZ867 subsystem refers to the TZ867 magazine tape subsystem

vii

1
Getting Started
This chapter describes what you need to know before upgrading the:
•

TF837 magazine tape subsystem to a TF857 magazine tape subsystem

•

TZ857 magazine tape subsystem to a TZ867 magazine tape subsystem

1.1 Upgrade FRUs
To upgrade a TF837 subsystem, you must remove the following two field replaceable units
(FRUs):
•

TK71 tape drive

•

TFK70 DSSI controller module

And replace them with:
•

TK85 tape drive

•

New DSSI controller module

To upgrade a TZ857 subsystem, you must remove the following two field replaceable units
(FRUs):
•

TK85 tape drive

•

SCSI controller module

And replace them with:
•

TK86 tape drive

•

New SCSI controller module

NOTE
Generic TZ867 subsystems have the drive and controller attached in the upgrade kit.

1.2 TF857 Upgrade Kit
The following table lists the contents of your TF857 upgrade kit:
Description

Part Number

TF85 tape subsystem (2.6 Gbytes, formatted)
TF857 Magazine Tape Subsystem Owner’s Manual
Cartridge for TK85 tape drive

TF85–AA
EK–TF857–OM
30–33075–07

1–1

1–2 Getting Started

Description

Part Number

Cartridge unit assembly cleaning cartridge
Medallion, TF857
Label, bar code .69 1.5
Label, serial TF857, USA
Upgrading the TF837 to a TF857 Magazine Tape Subsystem

70–27644–01
74–39761–02
36–21711–09
36–35031–04 A
EK–TF857–UP

1.3 TZ867 Upgrade Kit
The following table lists the contents of your TZ867 upgrade kit:
Description

Part Number

TZ86 tape subsystem (6.0 Gbytes, formatted)
TX867 Magazine Tape Subsystem Owner’s Manual

TZ86–AA
EK–TX867–OM

Writer’s Note: Cartridges part of kit?
Cartridge for TK86 tape drive
Cartridge unit assembly cleaning cartridge
Medallion, TZ867
Label, bar code 1.62 6.00
Label, serial TZ867, USA
Label, serial TZ867, Germany
Upgrading the TX800 Series Magazine Tape Subsystem

30–33075–07
70–27644–01
74–46124–01
36–28231–08
36–35031–15 A
36–35031–16 A
EK–TF857–UP

Getting Started 1–3

1.4 Upgrade Guidelines
Before removing and replacing the drives and modules:
•

Make sure no tape cassette is in the tape drive.

•

Dismount the device by using a console command.
During removal and replacement:

•

Do not disconnect the external DSSI or SCSI communications cable unless the system is shut
down. Doing so while the system is running can cause a system failure and possibly cause
customer data loss.

•

Save the hardware; the metric screws are not readily available.

•

Observe all electrostatic discharge (ESD) precautions.

2
Removing and Replacing the Controller Module
This chapter describes how to:
•

Remove the TFK70 DSSI controller module and replace it with the new controller module

•

Remove the old SCSI controller module and replace it with the new SCSI controller module

CAUTIONS
To maintain stability, slide only one TF837 or TZ857 subsystem from its enclosure at a
time.
Do not disconnect the external DSSI or SCSI communications cable at the rear chassis.
Doing so can cause an error on the DSSI or SCSI bus.

2.1 Warm Swap Procedure
Writer’s Note: Does this apply to a SCSI device?
By using the warm swap procedure, you can perform the upgrade without powering down the
host system, or without taking all other devices off-line and disconnecting the DSSI or SCSI bus.
The warm swap procedure is the most efficient for customers because users can operate on the
system while you do the procedure. The warm swap procedure lets you:
•

Remove and replace the controller module while the host system is operating.

•

Replace the new controller module parameters with the original controller module
parameters, preventing multiple device names and images from being listed.

The rest of this section applies to the TF857 subsystem upgrade. If you are doing a TZ867
subsystem upgrade, go to Section 2.1.3.

2.1.1 Collecting and Recording Original Controller Module Parameters
Each TFK70 DSSI controller module comes from the manufacturer with a unique node name and
system ID number. When you power up a TF837 subsystem with a newly installed controller
module, the new parameters transfer to the host, and are added to the device list seen by the
host.
You must set the DSSI node ID on the new controller module the same as the DSSI node ID on
the old controller module. The new subsystem will have a new node name and new system ID;
you can change both through PARAMS, if required.
The device list is updated only during a reboot. Therefore, you may see the ‘‘ghost name and
ID’’ of a controller module that you have removed. The previous parameters remain, although no
physical device is present.

2–1

2–2 Removing and Replacing the Controller Module

Before performing the warm swap procedure, you must collect and record the original controller
module parameters. In particular, you must note the following information during the procedure:
•

Current node name — This is the parameter known as NODENAME.

•

Unit number — This is the parameter known as UNITNUM.

•

System ID number — This is the parameter known as SYSTEMID.

You can obtain these parameters in one of three ways:
•

Refer to the system site guide in which the parameters may have been recorded during
installation.

•

Use the ANALYZE/SYSTEM command to obtain information from the system.

•

Use the SET HOST/DUP command to read the parameters from EEPROM (if the controller
module is accessible).

You can use PARAMS to set your current parameter values into the new controller module. See
the TF857 Magazine Tape Subsystem Owner’s Manual for more information on using PARAMS.
2.1.1.1 Using the ANALYZE/SYSTEM Command
At the DCL prompt ($), enter the following VMS command:
$ ANALYZE/SYSTEM

The system displays the system analyzer prompt:
SDA>

At this prompt, enter the command:
SDA> SHOW DEVICE MI

to list the node name, system ID number, and unit number.
The following example is an output screen example showing a node name, unit number, and
system ID. The node name is TAPE1; the unit number is the final digit in the MIA0 portion of
the node name. In this case, the unit number is 0. The system ID is 3C3643CABC35.
SDA> SHO DEV MI
I/O data structures
------------------DDB list
-------Address
-------

Controller
----------

ACP
---

Driver
------

DPT
---

DPT size
--------

804D8230

TAPE1$MIA0

MTAACP

TUDRIVER

8030D330

4070

--- TAPE1 System Block (SB) 804DB170 --System ID
3C3643CABC35
Max message size
64
Max datagram size
64
Local hardware type
TF70
Local hardware vers. 202020202020
303041202020

Local software type
TFXX
Local software vers.
T2.4
Local software incarn. 00010000
00010000
SCS poller timeout
001A
SCS poller enable mask
01

Press RETURN for more.

To exit the system analyzer, you must type the entire word EXIT at the SDA> prompt:
SDA> EXIT

Removing and Replacing the Controller Module 2–3

Once you find the correct information, proceed with the warm swap procedure.
2.1.1.2 Using the SET HOST/DUP Command
Use the SET HOST/DUP command to read the parameters from EEPROM as well as access the
PARAMS> prompt to set parameters.
NOTE
Before running the SET HOST/DUP command, be sure to load the FYDRIVER local
program by using this command:
$ MCR SYSGEN CONN FYA0/NOADAP

The following is an example output screen showing the information collected with the SET
HOST/DUP command. Be sure to use the parameters listed under Current.
$ SET HOST/DUP/SERVER=MSCP$DUP/TASK=PARAMS TAPE1
%HSCPAD-I-LOCPROGEXE, Local program executing - type ^\ to exit
Copyright © 1990 Digital Equipment Corporation
PARAMS> SHOW /ALL
Parameter
--------UNITNUM
FORCEUNI
NODENAME
FORCENAM
SYSTEMID

Current
------------0
0
TAPE1
0
3C3643CABC35

Default
-----------0
1
T7D0J9
0
3C3643CABC35

Type
-------Word
Boolean
String
Boolean
Quadword

Radix
----Dec
0/1
Ascii
0/1
Hex

NOTE
When using the SHOW /ALL command, be sure to leave a space after the word SHOW.
To exit the PARAMS utility, type:
PARAMS> EXIT

Make a note of the current parameters and proceed with the warm swap procedure.

2.1.2 Removing the Controller Module Assembly from a TF837 Subsystem
To remove the TFK70 DSSI controller module:
1. Make sure a tape is not in use or mounted in the TK71 drive.
2. Press the Eject button on the operator control panel (Figure 2–1).
3. Open the receiver and remove the magazine.
4. Set the Mode Select key to Service Mode (Figure 2–1).
5. Open the rear door of the storage array.
6. Turn off subsystem power (Figure 2–2) and disconnect the ac power cord.
7. Release the two screws holding the controller module tray. Slide the tray out (Figure 2–2).
NOTE
Be sure not to disconnect the external DSSI communications cable at the rear
chassis bulkhead connector. Doing so can cause an error on the DSSI bus
(Figure 2–2).
8. Slowly pull the tray approximately three-fourths from the rear chassis. Be careful not to
remove the tray completely from the rear chassis.

2–4 Removing and Replacing the Controller Module

9. Disconnect the internal DSSI communications cable from the controller module (Figure 2–3).
10. Disconnect the drive communications cable and the power harness from the controller
module.
11. Release the four module clips, one in each corner of the module (Figure 2–2).
12. Lift and remove the TFK70 DSSI controller module. Note the DSSI node ID settings
(Figure 2–4) on the module.
13. Disconnect the loader transfer assembly communications cable (Figure 2–3).

2.1.3 Removing the Controller Module Assembly from a TZ857 Subsystem
To remove the old SCSI controller module:
1. Ensure a tape is not in use or mounted in the TK85 drive.
2. Turn off subsystem power (Figure 2–2) and disconnect the ac power cord.
3. Release the two screws holding the controller module tray. Slide the tray out (Figure 2–2).
NOTE
Be sure not to disconnect the external SCSI communications cable at the rear
chassis bulkhead connector. Doing so can cause an error on the SCSI bus
(Figure 2–2).
4. Slowly pull the tray approximately three-fourths from the rear chassis. Be careful not to
remove the tray completely from the rear chassis.
5. Disconnect the internal SCSI communications cable from the controller module (Figure 2–3).
6. Disconnect the drive communications cable and the power harness from the controller
module.
7. Release the two metal tabs under the rear of the controller module (Figure 2–2).
8. Lift and remove the controller module.
9. Disconnect the loader transfer assembly communications cable (Figure 2–3).

Removing and Replacing the Controller Module 2–5

Figure 2–1 Operator Control Panel

OPERAT OR CONTROL PANEL

Eject

Load/Unload

MOD E S E LE C T K E Y

BUTTON
AND
INDICATOR
AREA

Slot Select
OCP
DISABLED

0
AUTOMATIC
MODE

Power On

OCP LABEL
CURRENT
SLOT
INDICATORS
0-6

Write
Protected
Tape In Use

MANUAL
MODE

Use
Cleaning Tape

SERVICE
MODE

Magazine
Fault
Loader Fault

Eject

DSSI NODE
ID LABEL

Load/Unload

Slot Select

0
Power On
Write
Protected

Write Protect
Load Fault

Tape In Use
Use
Cleaning Tape

Magazine
Fault
Loader Fault

5
4

40% REDUCTION

SHR_X1025B_89

2–6 Removing and Replacing the Controller Module

Figure 2–2 TFK70 DSSI Bus Controller Module Tray

MODULE TRAY

INTERNAL
DSSI CABLE

DSSI BULKHEAD
CONNECTOR
SHIPPING
RESTRAINT
SCREW

TRAY
SCREWS

MODULE CLIPS

POWER SWITCH

SHR-0002-90
SHR-X0141A-90-CPG

Removing and Replacing the Controller Module 2–7

Figure 2–3 Identifying the Cables of the Subsystem

PLASTIC SPACER BAR

POWER HARNESS

LOADER TRANSFER
ASSEMBLY COMMUNICATIONS
CABLE

DSSI CONNECTOR

DRIVE COMMUNICATIONS CABLE
HOLD-DOWN TABS

2–8 Removing and Replacing the Controller Module

Figure 2–4 Locating the DSSI ID Switch on the TFK70 DSSI Controller Module
LOADER
TRANSFER ASSEMBLY
COMMUNICATIONS
CONNECTOR

REMOTE
FRONT
PANEL
CONNECTOR

POWER
CONNECTOR

J2
J7
E46

E14

DSSI COMMUNICATIONS
CONNECTOR

S1
TAPE DRIVE
COMMUNICATIONS
CONNECTOR

1
0
1

SW1 = TMSCP

DSSI ID
SW2 SW3 SW4
MSB

LSB

SHR-X0055A-90

Removing and Replacing the Controller Module 2–9

Figure 2–5 Locating the DSSI ID Switch on the New Controller Module

M O D U L E A C TU A L L Y C L O S E D
I N M O D U L E TR A Y .
SHOWN OPEN BELOW
FO R C L A R I TY .

DSSI ID SWITCH
CARRIER
S1
1
0
1

J6 DIAGNOSTIC
PORT (NOT USED)

J1 TO
LOADER

J3 TO
TK85 DRIVE

J2
J4

D1
D2
J5

J7
J10
DSSI
CONNECTOR

INDICATORS
J11
POWER
INPUT

J9 POWER JUMPER
TO DRIVE
(MAY NOT BE USED)
SHR-X0035-91

2–10 Removing and Replacing the Controller Module

2.1.4 Preparing the Module Tray for the TF857 Subsystem
To prepare the module tray for the new controller module:
1. Pull the module tray forward and push out the drive communications cable.
2. Open the metal clamp at the left front of the module tray. Press the clamp tips down to the
tray bottom to prevent cable damage (Figure 2–6).
3. Locate, in the tray, the plastic spacer bar containing four countersunk holes. Remove the two
screws. SAVE THESE SCREWS. You will reuse them when you install the new module.
4. Relocate the loader transfer assembly communications cable to the opposite side of the tray.
To do this, release with pliers or a screwdriver, one of two plastic, hold-down tabs for the
power harness (Figures 2–3 and 2–6). It does not matter which one of the two hold-down
tabs you release.
5. Slip the loader transfer assembly communications cable out from under the power harness.
Unfold the cable until it is straight. Slide the cable forward until 3-1/2 inches of cable are
remaining beyond the hold-down tab. Fold the cable 90 degrees to the right, just beyond the
hold-down tab. (Be sure to rotate the cable with the cable’s red side on the forward side.
Then it will correctly connect to the new controller module.)

2.1.5 Unpacking the TF857 Subsystem
To unpack the upgrade kit:
1. Take the TF85 tape subsystem out of the upgrade kit.
2. Disconnect the power cable (PN 17–02614–01) from the new controller module and the TK85
drive. This power cable is not used for this application.
3. Unsnap the controller module from the metal tabs of the drive.
4. Disconnect the drive communications cable from the new controller module.
5. Put aside the new controller module.
6. Unscrew the noncaptive screws of the metal module clip with hold-down tabs on the TK85
drive and put aside the drive.

2.1.6 Installing the New Controller Module for the TF857 Subsystem
To install the new controller module:
NOTE
Before installing the new controller module, make sure the node ID of the new
controller module matches the node ID of the TFK70 DSSI controller module (Figures
2–4 and 2–5).
1. Position the plastic spacer bar with the threaded holes of the module tray (Figure 2–6). Make
sure the holes are in front of where the screws are going.
2. On top of the spacer bar, fasten the metal module clip (from the TK85 drive) with the metal
module clip tabs in the rear (Figure 2–6). The ends of the plastic spacer bar and the ends of
the metal module clip should be even. Use the two screws you saved.
3. Seat the new controller module carrier with the prongs in the horizontal tray slots at the
front of the tray (Figure 2–6).

Removing and Replacing the Controller Module 2–11

Figure 2–6 The Loader Transfer Assembly Communications Cable Rerouted

POWER HARNESS

DSSI CONNECTOR

PLASTIC SPACER BAR
WITH METAL MODULE
CLIP

CABLE CLAMP

TRAY SLOTS
REROUTED LOADER TRANSFER
ASSEMBLY COMMUNICATIONS
CABLE

4. With the new controller module tilted up, attach the loader transfer assembly
communications cable to the module (Figure 2–7).
5. Gently lower the controller module into the tray to avoid damaging the loader transfer
assembly communications cable. Push on the two outer controller module screws, one in each
corner, to avoid damaging the etch.
6. While snapping in the tabs of the metal module clip, press into the clip tabs, the plastic tabs
in the rear of the controller module.
7. Attach the power harness and attach the DSSI cable to the controller module.
8. Slide the controller module tray gently into the rear chassis to avoid damaging cables
(Figure 2–8).

2–12 Removing and Replacing the Controller Module

Figure 2–7 Installing the New Controller Module

POWER HARNESS

DSSI CONNECTOR

LOADER TRANSFER
ASSEMBLY COMMUNICATIONS
CABLE

Removing and Replacing the Controller Module 2–13

Figure 2–8 Rear of the TF857 Subsystem

MODULE TRAY

INTERNAL
DSSI CABLE

DSSI BULKHEAD
CONNECTOR
SHIPPING
RESTRAINT
SCREW

TRAY
SCREWS

POWER SWITCH

SHR-0002-90
SHR-X0141B-90-CPG

2.1.7 Preparing the Module Tray for the TZ867 Subsystem
To prepare the module tray for the new controller module:
1. Pull the module tray forward and push out the drive communications cable.
2. Open the plastic cable clamp at the left front of the module tray.

2.1.8 Unpacking the TZ867 Subsystem
To unpack the upgrade kit:
1. Take the TZ867 subsystem out of the upgrade kit.
2. Unsnap the controller module from the metal tabs of the drive.
3. Disconnect the drive communications cable from the new controller module.
4. Put aside the new controller module.
5. Unscrew the noncaptive screws of the metal module clip with hold-down tabs on the TK86
drive and put aside the drive.

2–14 Removing and Replacing the Controller Module

2.1.9 Installing the New Controller Module for the TZ867 Subsystem
To install the new controller module:
1. Seat the new controller module carrier with the prongs in the horizontal tray slots at the
front of the tray (Figure 2–6).
2. With the new controller module tilted up, attach the loader transfer assembly
communications cable to the module (Figure 2–7).
3. Gently lower the controller module into the tray to avoid damaging the loader transfer
assembly communications cable. Push on the two rear corners of the controller module to
avoid damaging the module.
4. While snapping in the tabs of the metal module clip, press into the clip tabs, the plastic tabs
in the rear of the controller module.
5. Attach the power harness and attach the SCSI cable to the controller module.
6. Connect the remote ID cable to the remote ID connector on the module. The connector is
labeled "Remote ID".
Writer’s Note: Does this step apply?
7. Slide the controller module tray gently into the rear chassis to avoid damaging cables
(Figure 2–8).

3
Removing and Replacing the Drive
This chapter describes how to:
•

Remove the TK71 tape drive and replace it with the TK85 tape drive

•

Remove the TK85 tape drive and replace it with the TK86 tape drive

3.1 Removing the TK71 or TK85 Tape Drive
To remove the TK71 or TK85 tape drive:
1. Set the Mode Select key to Service mode (Figure 2–1).
2. Close the receiver.
3. Loosen the shipping screw in the upper right corner of the subsystem rear panel. (This step
does not apply to generic loaders.)

3–1

3–2 Removing and Replacing the Drive

4. Use a screwdriver to press the first mechanical stop; slide the subsystem to the second
mechanical stop (Figure 3–1).
Figure 3–1 Mechanical Stops

SECOND
MECHANICAL
STOP

FIRST
MECHANICAL
STOP

4
1

6
3

CXO-2461B
SHR_X1106D_89

Removing and Replacing the Drive 3–3

5. Lift the latch (Figure 3–2) and swing open the loader transfer assembly.
Figure 3–2 Loader Open Latch

DSSI
CONNECTOR

LOADER TRANSFER ASSEMBLY

INTERLOCK
SWITCH

CONTROLLER
MODULE

OPERATOR
CONTROL
PANEL
(OCP)
LATCH
MECHANICAL
EJECTION
LEVER

TK85
TAPE
DRIVE

POWER SUPPLY
ASSEMBLY

HANDLE
MOTOR
ASSEMBLY

FAN
(LOCATED ON
OUTSIDE REAR
OF UNIT)

HOME POSITION
OF ELEVATOR
SHR-X0147F-90-CPG

6. Use a screwdriver to disengage the four captive screws that secure the drive at the right
(Figure 3–2) and left (Figure 3–3) sides of the rear chassis. Each screw is recessed inside a
nut. Do not attempt to loosen these nuts.
NOTE
Remember the position of the old drive handle. The drive handle of the new drive
needs to be in the same position as that of the old drive handle when you install
the new drive.

3–4 Removing and Replacing the Drive

Figure 3–3 Captive Screws for Drive

HINGE LOCKING LEVER

LOADER
TRANSFER ASSEMBLY
COMMUNICATIONS CABLE

LOADER
TRANSFER ASSEMBLY
POWER CABLE

LEFT
CAPTIVE
SCREWS

GROUND
STRAP

CABLE CLAMPS

KEY LOCK
ASSEMBLY

TRANSFER ASSEMBLY
KEY SWITCH CABLE
SHR-X0143-90-CPG

Removing and Replacing the Drive 3–5

7. Disengage the handle motor assembly from the drive handle by pushing or pulling the plastic
tab on the handle motor assembly about one inch to the right (Figure 3–4). (You may have
to move the drive slightly to release the plastic tab.) Rotate the black plastic tab toward the
handle motor assembly.
Figure 3–4 Plastic Tab

3 SCREWS

PLASTIC TAB
SHR-0012-90
SHR-X0147B-90-CPG

8. Slide the drive toward you, almost fully out of the rear chassis.
9. Disconnect the 4-pin power supply cable and drive communications cable (flat ribbon cable)
from the rear of the drive, and remove the drive from the rear chassis. (Can this step apply
to TF857 and TZ867? If so, then delete next step.)
10. Disconnect the 4-pin power supply cable from the rear of the drive, and remove the drive
from the rear chassis.

3–6 Removing and Replacing the Drive

3.2 Installing the TK85 or TK86 Tape Drive
To install the TK85 or TK86 tape drive:
1. Insert the tape drive halfway into the rear chassis, and for the TK85 drive, keep the
controller communications cable on top of the drive.
2. Attach the 4-pin power cable to the TK85 drive.
3. Attach the 4-pin power cable and connect the drive communications cable to the TK86 drive.
(Can the last two steps be combined? or does each drive have a separate step?)
CAUTION
Carefully position the cables when sliding the drive into the chassis, ensuring no
damage occurs from snagging.
4. Slide the drive into the rear chassis; align the drive handle shaft with the handle motor
coupling shaft (Figure 3–5).
You can see the drive handle shaft by looking down on the drive from the top. A half-moon
cutout in the drive bezel accommodates the shaft and coupling assembly.
5. Make sure the new drive handle is in the same position as that of the old drive handle when
you removed the old drive. Engage the drive handle shaft with the handle motor coupling
shaft:
a. Rotate the plastic tab into the horizontal position and push the handle motor coupling
shaft toward the drive; it will slip partially onto the drive handle shaft.
NOTE
Locate the plastic tab on the drive. This tab, along with a small metal tab
(write-protect switch), is inside the cartridge opening adjacent to the Tape In
Use indicator on the bezel. This assembly locks the drive handle and must be
pushed to the right to lift the handle.
CAUTION
Failure to release the plastic tab before lifting the handle could cause damage;
do not force the handle against the locking mechanism.
b. With the handle in the correct position, apply pressure to the handle motor coupling
shaft until it is fully engaged. You may need to wiggle the drive slightly to seat the shaft
firmly.
6. Engage the four captive screws on the rear chassis with the threaded holes on the drive.
You may have to pull up the drive slightly to engage the captive screws. Do not completely
tighten the screws; use the following sequence:
Left front
Left rear
Right front
Right rear
7. Then tighten screws in the following order:
Left front
Left rear
Right front
Right rear

Removing and Replacing the Drive 3–7

Figure 3–5 Handle Motor Assembly

DRIVE
CUTOUT

DRIVE
HANDLE
SHAFT

HANDLE
MOTOR
COUPLING
SHAFT

SENSOR
ASSEMBLY
ARM

PLASTIC TAB

PIVOT
GEAR
PINION
GEAR

STOPPER
SHR-0067-89
SHR-X0146-90-CPG

8. Do this step for the TF837 to TF857 subsystem upgrade only. Pull the module tray forward
and pass the drive communications cable through the opening in front of the connector on
the controller module. Connect the drive communications cable to the controller module.
Carefully lead the cables through so the cables do not interfere with the mechanisms.
9. Close the loader transfer assembly.
CAUTION
If the handle motor coupling shaft is seated correctly, the loader transfer assembly
closes and latches without difficulty. Use caution in closing the loader transfer
assembly and push the black plastic tab farther toward the drive, if necessary, to
seat it fully. Be careful not to damage the heads on the drive mounting screws.
10. Slide the subsystem fully into the enclosure.
CAUTION
Carefully guide the cables while sliding the tray in or out. Because the cables are
loose, they could interfere with the handle down optic sensor.
11. At the rear of the unit, slide in the controller module tray and tighten the one-quarter turn
captive screws that secure the controller module tray (Figure 3–6).

3–8 Removing and Replacing the Drive

Figure 3–6 Captive Screws for Controller Module Tray
DSSI
BULKHEAD
CONNECTOR
SCREWS

CONTROLLER
MODULE
TRAY
SCREWS

DSSI
BULKHEAD
CONNECTOR

FAN SCREWS
SHR-0001-90
SHR-X0145-90-CPG

12. Redress the external DSSI or SCSI communications cable(s) into the rear chassis’ cable
restraints.
13. For the TF837 to TF857 subsystem upgrade only, redress the subsystem’s ac power cable into
the cable restraints.
14. Verify a secure power connection at both ends of the power cable.
15. Release the medallion at the top right. Above the operator control panel, insert a screwdriver
into the louver next to the medallion center and pry out the medallion. Insert the new
medallion into the medallion opening.
16. Remove the old subsystem serial number label at the back of the rear chassis. Add the new
subsystem serial number label in the same spot as that of the old serial number.
17. Remove the old bar code label and add the new bar code label.
The subsystem is now upgraded. Ensure the host system is rebooted to recognize the new
subsystem.

4
Verifying the Upgrade
To verify the upgrade is operating correctly:
1. Set the TF857 or TZ867 subsystem power switch to 1 (on). If the Power On indicator does
not light, verify that the subsystem is placed as far into the enclosure as possible.
2. Secure the rear door of the storage array.
3. Install a scratch tape in slot 0 of the magazine.
4. Install the magazine into the receiver.
5. For reading and writing purposes, load CompacTape III cartridges into the magazine. Up
to seven cartridges can be loaded. (Writer’s Note: Not sure about this next sentence for the
TZ867.) CompacTape and CompactTape II cartridges can only be read by the TK85 drive.
6. Execute LDRTST for the TF857 subsystem. (See the TF857 Magazine Tape Subsystem
Owner’s Manual for information on running local diagnostic programs and utilities.)

4–1