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inventory of modules may be incorrect and the contents of some or all of the
modules will be inaccessible to the system and to the host.
When the expansion unit comes up, it will communicate with each base
module through the expansion unit interface and inventory the number of
base modules, tape drives, and cartridges present in each base module. After
the MiniLibrary configuration has been determined, the expansion unit
will communicate with each base module and indicate to the base module
which cartridge group that base module contains. The cartridges slots are
numbered by the expansion unit as follows:
• Expansion unit: 0 through 15
• Top TL891/TL892: 16 through 25
• Middle TL891/TL892: 26 through 35
• Bottom TL891/TL892: 36 through 45
When all initialization communication between the expansion module
and each base module has completed, the base modules will display their
cartridge numbers according to the remapped cartridge inventory.
For instance, the middle base module default screen would be displayed as
follows:
DLT2 Idle
DLT3 Idle
Loader Idle
26>__________<35
8.8.2.4 Setting the TL890/TL891/TL892 SCSI ID
After the base modules have been reconfigured as slaves, each base module
control panel still provides tape drive status and error information, but all
control functions are carried out from the expansion unit control panel. This
includes setting the SCSI ID for each of the tape drives present.
To set the SCSI IDs for the tape drives in a MiniLibrary configured with
TL890/TL891/TL892 hardware, follow these steps:
1. Apply power to the MiniLibrary, ensuring that you power up the
expansion unit after or at the same time as the base modules.
2. Wait until power-on self-tests (POST) have terminated and the
expansion unit and each base module display the default screen.
3. At the expansion unit control panel, press the Enter button to display
the Main Menu.
Configuring a Shared SCSI Bus for Tape Drive Use 8–35