Compaq AA-RHGWB-TE Cabling the TZ88N-VA, TZ88N-VA Switch Settings, Scsi ID Selection Switches

Table 8–1: TZ88N-VA Switch Settings

SCSI ID	SCSI ID Selection Switches
	1	2	3	4	5	6
Automatica	Off	Off	Off	On	On	On
0	Off	Off	Off	Off	Off	Off
1	On	Off	Off	Off	Off	Off
2	Off	On	Off	Off	Off	Off
3	On	On	Off	Off	Off	Off
4	Off	Off	On	Off	Off	Off
5	On	Off	On	Off	Off	Off
6	Off	On	On	Off	Off	Off
7	On	On	On	Off	Off	Off

aSBB tape drive SCSI ID is determined by the SBB physical slot.

8.1.2Cabling the TZ88N-VA

There are no special cabling restrictions specific to the TZ88N-VA; it is installed in a BA350 StorageWorks enclosure. A DWZZA-VA installed in slot 0 of the BA350 provides the connection to the shared SCSI bus. The tape drive takes up three slots, so two SCSI IDs are unavailable for disks in this StorageWorks enclosure. Another BA350 may be daisy chained to allow the use of the SCSI IDs unavailable in the first StorageWorks enclosure due to the TZ88 tape drive.

You must remove the DWZZA-VA differential terminators. Ensure that DWZZA-VA jumper J2 is installed to enable the single-ended termination. The BA350 jumper and terminator must be installed.

A trilink connector on the DWZZA-VA differential end allows connection to the shared bus. An H879-AA terminator is installed on the trilink for the BA350 on the end of the bus to provide shared SCSI bus termination.

Figure 8–2 shows a TruCluster Server cluster with two shared SCSI buses. The top shared bus has a BA350 with disks at SCSI IDs 1, 2, 4, and 5. The other BA350 contains a TZ88N-VA at SCSI ID 3.

Configuring a Shared SCSI Bus for Tape Drive Use 8–3