Technical data

They both work with an expansion unit (previously called the
DS-TL890-NE) and a new module called the data unit.
Section 8.12 covers the TL881 and TL891 with the common
components as sold with the Compaq 6-3 part numbers.
As long as the TL89x MiniLibrary family is being sold with
both sets of part numbers, the documentation will retain the
documentation for both ways to configure the MiniLibrary.
8.1 Preparing the TZ88 for Shared Bus Usage
Two versions of the TZ88 are supported: the TZ88N-TA tabletop standalone
enclosure, and the TZ88N-VA StorageWorks building blocks (SBB)
13.34-centimeter (5.25-inch) carrier.
As with any of the shared SCSI devices, the TZ88N-TA and TZ88N-VA SCSI
IDs must be set to ensure that no two SCSI devices on the shared SCSI
bus have the same SCSI ID.
The following sections describe preparing the TZ88 in more detail.
8.1.1 Setting the TZ88N-VA SCSI ID
You must set the TZ88N-VA switches before the tape drive is installed into
the BA350 StorageWorks enclosure. The Automatic selection is normally
used. The TZ88N-VA takes up three backplane slot positions. The physical
connection is in the lower of the three slots. For example, if the tape drive
is installed in slots 1, 2, and 3 with the switches in Automatic, the SCSI
ID is 3. If the tape drive is installed in slots 3, 4, and 5 with the switches
in Automatic, the SCSI ID is 5. The switch settings are listed in Table 8–1.
Figure 8–1 shows the TZ88N-VA with the backplane interface connector and
SCSI ID switch pack.
8–2 Configuring a Shared SCSI Bus for Tape Drive Use