Compaq AA-RHGWB-TE - Manual (Page 196)

Figure 8–7: TZ887 DLT MiniLibrary Rear Panel
+
-
0
TZ887
ZK-1461U-AI
SCSI ID
SCSI ID
Selector
Switch
+
-
0
8.5.2 Cabling the TZ887 Tape Drive
The TZ887 is connected to a single-ended segment of the shared SCSI
bus. It is connected to a differential portion of the shared SCSI bus with a
DWZZB-AA. Figure 8–8 shows a configuration with a TZ887 for use on a
shared SCSI bus. The TZ887 in this figure would have the SCSI ID set to
0. The member systems use SCSI IDs 6 and 7, and the disks are located
in the BA356 slots at SCSI IDs 1-5.
To configure the shared SCSI bus for use with a TZ887, follow these steps:
1. You will need one DWZZB-AA for each shared SCSI bus with a TZ887
tape drive.
Ensure that the DWZZB-AA jumpers W1 and W2 are installed to enable
the single-ended termination.
Remove the termination from the differential end by removing the five
14-pin SIP resistors.
2. Attach an H885-AA trilink connector to the differential end of the
DWZZB-AA.
3. Connect the single-ended end of the DWZZB-AA to the TZ887 with a
BN21M cable.
4. Install an H8574-A or H8890-AA terminator on the other TZ887 SCSI
connector.
5. Connect the trilink on the DWZZB-AA to another trilink or Y cable
on the differential shared SCSI bus with BN21K or BN21L cables.
Ensure that the trilink or Y cable at both ends of the shared SCSI bus is
terminated with an H879-AA terminator.
8–16 Configuring a Shared SCSI Bus for Tape Drive Use