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8.3 Compaq 20/40 GB DLT Tape Drive
The Compaq 20/40 GB DLT Tape Drive is a Digital Linear Tape (DLT)
tabletop cartridge tape drive capable of holding up to 40 GB of data
per Compactape IV cartridge using 2:1 compression. It is capable of
storing/retrieving data at a rate of up to 10.8 GB per hour (using 2:1
compression).
The Compaq 20/40 GB DLT Tape Drive uses CompacTape III, CompacTape
IIIXT, or CompacTape IV media.
It is a narrow, single-ended SCSI device, and uses 50-pin, high-density
connectors.
For more information on the Compaq 20/40 GB DLT Tape Drive, see the
following Compaq documentation:
• Compaq DLT User Guide (185292-002)
• DLT Tape Drive User Guide Supplement (340949-002)
The following sections describe how to prepare the Compaq 20/40 GB DLT
Tape Drive for shared SCSI bus usage in more detail.
8.3.1 Setting the Compaq 20/40 GB DLT Tape Drive SCSI ID
As with any of the shared SCSI devices, the Compaq 20/40 GB DLT Tape
Drive SCSI ID must be set to ensure that no two SCSI devices on the shared
SCSI bus have the same SCSI ID.
The Compaq 20/40 GB DLT Tape Drive SCSI ID is set with a push-button
counter switch on the rear of the unit (see Figure 8–4). Push the button above
the counter to increment the address; push the button below the counter to
decrement the address until you have the desired SCSI ID selected.
Only SCSI IDs in the range of 0 to 7 are valid. Ensure that the tape drive
SCSI ID does not conflict with the SCSI ID of the host bus adapters (usually
6 and 7) or other devices on this shared SCSI bus.
Configuring a Shared SCSI Bus for Tape Drive Use 8–9