Specifications

Use the switch settings listed in Table 5-2 to set the SCSI
switches on the backs of your expansion boxes.
When assigning numbers, assign ID 0 to the device closest to
the system unit, ID 1 to the device next to it, and so on. If you
have a BA42 storage expansion box that contains two hard disk
drives, consider the drive on the right side of the box as you
face the back of the box to be closer to the system unit than the
one on the left. If you have a BA42 expansion box that contains
a tape or an optical compact disc drive, see the BA42 Storage
Expansion Box Installation Guide for instructions on setting ID
switches on those drives.
If a BA42 storage expansion box contains only one hard disk
drive, use the set of switches on your right as you face the back
of the box.
Expansion box SCSI switches are illustrated in Figure 5-5.
Table 5-2. SCSI ID Switch Settings
ID Number
Hard Disk Drive
RRD40 Compact Disc Drive
1
TZ30 Tape Drive
2
TK50Z Tape Drive
TLZ04 Tape Drive
3
RX23 Floppy Disk Drive
RX33 Floppy Disk Drive
7 Reserved Reserved
6 Up Up Down Down Down Up
5 Up Down Up Down Up Down
4 Up Down Down Down Up Up
3 Down Up Up Up Down Down
2 Down Up Down Up Down Up
1 Down Down Up Up Up Down
0 Down Down Down Up Up Up
1
Switch 4 on the RRD40 optical compact disc drive has no effect on the ID number.
2
Switch 1 (the left switch) on the TZ30 tape drive should always be in the up
position. ID switch settings listed here for this drive start with switch 2.
3
Switch 1 (the left switch) on the TLZ04 tape drive should always be in the up
position. ID switch settings listed here for this drive start with switch 2.
External Storage Options: Hard Disk, Floppy Disk, Tape, and Optical Compact Disc Drives 5–7