Technical data

8.4.2 Cabling the Compaq 40/80-GB DLT Drive
The Compaq 40/80-GB DLT Drive is connected to a single-ended segment
of the shared SCSI bus. Figure 8–6 shows a configuration with a Compaq
40/80-GB DLT Drive for use on a shared SCSI bus.
To configure the shared SCSI bus for use with a Compaq 40/80-GB DLT
Drive, follow these steps:
1. You need one DWZZB-AA for each shared SCSI bus with a Compaq
40/80-GB DLT 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. Connect an H885-AA trilink connector with attached H879-AA HD68
terminator to the differential end of the DWZZB-AA signal converter.
3. Connect a 328215-00X, BN21K, or BN21L cable between a Y cable or
trilink connector on one of the system host bus adapters and the open
connector on the trilink on the DWZZB-AA differential end. Keep the
total length of the differential segment below the 25-meter (82-foot)
maximum length. Ensure that the trilink or Y cable at both ends of
the differential segment of the shared SCSI bus is terminated with an
HD68 differential terminator such as an H879-AA.
4. Install a 152732-001 LVD terminator on one of the Compaq 40/80-GB
DLT Drive SCSI connectors. The LVD terminator works with either a
low voltage differential or a single-ended SCSI bus.
5. Connect one of the following HD68-to-HD68 cables between the other
Compaq 40/80-GB DLT Drive SCSI connector and the single-ended end
of the DWZZB-AA signal converter:
• 189646-001 (0.9-meter; 2.95-foot) or 189646-002 (1.8-meter; 5.9-foot)
cable
• BN21K-01 or BN21L-01 (1-meter; 3.3-foot) cable
• BN21K-02 or BN21L-02 (2-meter; 6.6-foot) cable
This single-ended SCSI bus segment is limited to a maximum length
of 3 meters (9.8 feet) (fast SCSI).
The single-ended SCSI bus may be daisy chained from one tape drive to
another with one of the cables listed in step 5 as long as you do not exceed
the single-ended SCSI bus maximum length of 3 meters (9.8 feet). The
distance includes the length of both cables on the single-ended bus segment.
Ensure that the tape drive on the end of the bus is terminated with an LVD
terminator.
8–16 Configuring a Shared SCSI Bus for Tape Drive Use