Compaq AA-RHGWC-TE manual Setting the MUC Scsi ID, Tape Drive Scsi IDs, MUC Scsi ID Selection

Table 8–12: MUC Switch Functions (cont.)

Switch	Function
7	Host selection: Down for SCSI, up for seriala
8	Must be down, reserved for testing

aFor a TruCluster Server cluster, switch 7 is down, allowing switches 1, 2, and 3 to select the MUC SCSI ID.

8.11.3Setting the MUC SCSI ID

The multi-unit controller (MUC) SCSI ID is set with switch 1, 2, and 3, as shown in Table 8–13. Note that switch 7 must be down to select the SCSI bus and enable switches 1, 2, and 3 to select the MUC SCSI ID.

Table 8–13: MUC SCSI ID Selection

MUC SCSI ID	SW1	SW2	SW3
0	Down	Down	Down
1	Up	Down	Down
2	Down	Up	Downa
3	Up	Up	Down
4	Down	Down	Up
5	Up	Down	Up
6	Down	Up	Up
7	Up	Up	Up

aThis is the default MUC SCSI ID.

8.11.4Tape Drive SCSI IDs

Each tape library arrives with default SCSI ID selections. The TL893 is shown in Table 8–14. The TL896 is shown in Table 8–15.

If you must modify the tape drive SCSI IDs, use the push-button up-down counters on the rear of the drive to change the SCSI ID.

Table 8–14: TL893 Default SCSI IDs

SCSI Port	Device	Default SCSI ID
C	MUC	2
	Drive 2 (top)	5
B	Drive 1 (middle)	4
A	Drive 0 (bottom)	3

Configuring a Shared SCSI Bus for Tape Drive Use 8–51