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EK-BA42A-AD-A01

January 1993

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Document:	Installing the RZ26 Hard Disk Drive in the BA42 Expansion Box
Order Number:	EK-BA42A-AD
Revision:	A01
Pages:	16
Original Filename:

OCR Text

Installing the RZ26 Hard Disk Drive in the BA42 Expansion Box
EK–BA42A–AD. A01
January 1993

Dear BA42 Expansion Box Customer:
This document describes how to install the RZ26 hard disk drive in your BA42
storage expansion box and provides the RZ26 drive hardware specifications.
The RZ26 drive installation differs from the hard disk drive installation
described in the BA42 Storage Expansion Box Installation Guide because of a
new internal SCSI ID switch cable adapter.
Insert this document into your BA42 Storage Expansion Box Installation Guide
(in the hard disk drive section of Chapter 2) for future reference.

© Digital Equipment Corporation 1993. All rights reserved.
The following are trademarks of Digital Equipment Corporation:
VAXstation, VMS, and the Digital logo.
S2144

1 Installation Overview
The following list is an overview of the tasks involved in installing the RZ26
hard disk drive in the BA42 expansion box:
1. Check the contents of the shipment.
2. Check your system configuration.
3. Set the SCSI ID switches.
4. Install the RZ26 drive.
5. Verify the installation.

2 Checking Components Shipped
Your shipment should contain all the components shown here. If any
component is missing, contact your Digital sales representative.

Documentation

RZ26 Hard
Disk Drive

SCSI ID
Adapter Cable
MLO-010152

Note
The SCSI ID adapter cable may come already attached to the RZ26
drive.

3 Checking Your System Configuration
Before you begin the RZ26 drive installation, put your system in console mode
and enter the SHOW CONFIG command. (If you need instructions, see the
system’s installation guide or user’s guide.)
Make a note of which SCSI IDs are already being used.
You must assign a SCSI ID number to each drive installed in a BA42 expansion
box. Numbers that can be used range from 0 to 7, and you can assign each
number only once.

3.1 Setting the SCSI ID Switches on the BA42 Expansion Box
SCSI ID switches for hard disk drives installed in a BA42 expansion box are
located on the back of the expansion box behind the SCSI ID switch cover.
Remove the switch cover as shown in Figure 1.

Figure 1 Removing the SCSI Switch Cover
Press the bottom of
cover. Then lift the
cover away from the box.

SCSI switch cover

WSEBAM25

If you have one hard disk drive installed in your expansion box, the right three
SCSI ID switches on the back of the box determine the SCSI ID switch setting
for that drive.
If you are installing a second hard disk drive in your expansion box, the left
three SCSI ID switches on the back of the box determine the SCSI ID switch
setting.
SCSI ID switches set for ID numbers
1 (down down up) on the left and
0 (down down down) on the right.

MLO-010153

3.2 Changing the SCSI ID Switch Setting
If the switches on your expansion box are set for a SCSI ID number that is not
available for use, use a pen or a small pointed object to flip the switches you
need to change.
Table 1 shows the SCSI ID switch settings for hard disk drives.
Table 1 SCSI ID Numbers and Switch Settings for Hard Disk Drives
SCSI ID

Switch Settings

Number

Switch 1

Switch 2

Switch 3

Down

4 Installing the RZ26 Hard Disk Drive
Here are the steps you follow to install the RZ26 drive. The sections following
the list describe each step.
1. Remove the cover from the BA42 box.
2. Attach the adapter cable to the RZ26 drive.
3. Check the cables inside the box.
4. Attach the SCSI and power cables to the drive.
5. Insert the drive in the expansion box.
6. Tighten the captive screw on the drive bracket.
7. Replace the cover on the BA42 box.

Step One: Remove the cover from the expansion box.
Follow these steps to remove the expansion box cover:
1. Loosen the two cover-release screws on the back of the expansion box.
2. Grasp each side of the cover and pull it toward you as shown in Figure 2.
Figure 2 Removing the Expansion Box Cover

Cover-release screws
WSEBAI20

3. Pull the cover up and away from the box.

Step Two: Attach the adapter cable to the RZ26 drive.
Figure 3 shows where to attach the adapter cable to the RZ26 hard disk drive.
The silver dot faces up as you insert the adapter cable onto the first three
SCSI pins. If there are jumpers on the three SCSI pins, remove them. Do not
remove any of the other jumpers.
Figure 3 Attaching the SCSI ID Adapter Cable to the RZ26 Hard Disk Drive

First 3
sets of pins
Silver dot

MLO-010157

Note
The SCSI ID adapter cable may come already attached to the RZ26
drive.

Step Three: Check the expansion box cables.
Figure 4 shows the cables inside the BA42 expansion box. The SCSI ID switch
cable connectors for the RZ5x drive and the RZ2x drive are different: the RZ5x
cable connector has 24 pins, and the RZ2x cable connector has 6 pins.
Figure 4 BA42 Internal Cables
SCSI
signal cable
SCSI ID
switch cable

Power
cable
MLO-010154

The SCSI ID adapter cable that came with your RZ26 drive attaches to either
the 24-pin connector or the 6-pin connector on one end, and to the RZ26 drive
on the other end.

Step Four: Attach the SCSI ID adapter cable.
Figure 5 shows how to attach the SCSI ID adapter cable to the RZ5x 24-pin
SCSI ID cable connector.
Figure 5 Attaching the SCSI ID Adapter Cable to a 24-Pin Cable Connector

Silver dot

MLO-010155

Figure 6 shows how to attach the SCSI ID adapter cable to the RZ2x 6-pin
SCSI ID cable connector. Make sure both silver dots are facing the same way,
and the plastic latch snaps to secure the connection.
Figure 6 Attaching the SCSI ID Adapter Cable to a 6-Pin Cable Connector

Silver dots

MLO-010156

Step Five: Attach the SCSI and power cables.
Figure 7 shows where to attach the SCSI and power cables to the RZ26 drive.
Figure 7 Attaching the SCSI and Power Cables

MLO-010252

Step Six: Insert the drive in the expansion box.
Tilt the drive until you can place the metal tabs on the bottom of the drive
bracket into the openings in the floor of the box.

WSEBAI87

Step Seven: Tighten the captive screw on the drive bracket.
Tighten the captive screw, as shown, to hold the drive in place.

WSEBAI88

Step Eight: Replace the cover and tighten the cover-release screws.
Position the cover over the SCSI ID switches on the back of your expansion box
by inserting the notch on the bottom of the cover into the opening below the
switches. Slide the cover forward, as shown, and snap the cover into place.
Caution:
Make sure the internal cables are pushed down into the box before
replacing the cover. Closing the cover on the cables can damage them.

Cover-release screws
WSEBAI19

5 Verifying the RZ26 Installation
To verify that the installation has been done correctly, turn on power to all
expansion boxes and then the system unit.
Put your system in console mode and enter the SHOW CONFIG command. (If
you need instructions, see the system’s installation guide or user’s guide.)
If the RZ26 drive does not appear in your configuration display, check the
On/Off switch on the expansion box.
If the switch is off, follow this procedure:
1. Turn off your system unit.
2. Turn on all expansion boxes and then the system unit. Check the
configuration display again.
If the switch is on, follow this procedure:
1. Turn off your system unit and expansion boxes.
2. Be sure all expansion box cables and power cords are connected securely.
3. Be sure the SCSI terminator is attached securely to the expansion box.
4. Be sure the internal cables are connected securely to the drive.
5. Check the expansion box cable connectors for damaged pins.
6. Check the SCSI ID switch settings.
7. Turn on all expansion boxes and then the system unit. Check the
configuration display again.
If the configuration display still does not show the drives in the expansion box,
contact your system manager or Digital service representative.

6 RZ26 Hard Disk Drive Hardware Specifications

Table 2 RZ26 Weight and Dimensions
Weight

Height

Width

Depth

0.9 kg

4.13 cm

10.2 cm

14.6 cm

(1.9 lb)

(1.625 in)

(4.00 in)

(5.75 in)

Table 3 RZ26 Drive Formatted Storage Capacity
Per drive

1050 MB

Per surface

75 MB

Bytes per track

29,640

Buffer size

512 KB

Table 4 RZ26 Drive Performance
Data transfer rate to/from media

2.6 MB/sec

Seek time track to track

1 msec

Seek time average

10 msec

Seek time maximum (full stroke)

20 msec

Average latency

5.6 msec

Rotational speed

5363 rpm

Table 5 RZ26 Drive Operating Conditions
Ambient temperature

10°C to 50°C (50°F to 122°F)

Relative humidity

10%–90%

Table 6 RZ26 Drive Nonoperating Conditions

Ambient temperature

–40°C to 66°C (–40°F to 151°F)

Relative humidity

8%–95% (non-condensing)