Table8–6: MUC Switch Functions
Switch Function
1, 2, and 3 MUC SCSI ID if Switch7 is downa
4 and 5 Must be down, reserved for testing
6Default is up, disable bus reset on power up
7Host selection: Down for SCSI, up for seriala
8Must be down, reserved for testing
aFora TruCluster Server cluster, switch 7 is down, allowing switches 1, 2, and 3 to select the MUC SCSI ID.
8.10.3 Setting the MUC SCSI ID
The multi-unit controller (MUC) SCSI ID is set withswitch 1, 2, and 3,as
shown in Table8–7. 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.
Table8–7: MUC SCSI ID Selection
MUC SCSI ID SW1 SW2 SW3
0Down Down Down
1Up Down Down
2Down Up Downa
3Up Up Down
4Down Down Up
5Up Down Up
6Down Up Up
7Up Up Up
aThisis the default MUC SCSI ID.
8.10.4 Tape Drive SCSI IDs
Each tape library arrives with default SCSI ID selections. The TL893 is
shown in Table8–8. The TL896 is shown in Table 8–9.
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.
Configuring a Shared SCSI Bus for Tape Drive Use 8–43