connector on the data unit and the female end to any Expansion Modules connector on the expansion unit.
_____________________ Note _____________________
It does not matter which interface connector you connect to a base unit or a data unit.
•SCSI bus connection to the expansion unit robotics: Connect the shared SCSI bus that will control the robotics to one of the SCSI connectors on the expansion unit with a 328215-00X, BN21K, or BN21L cable. Terminate the SCSI bus with an HD68 terminator (such as an H879-AA) on the other expansion unit SCSI connector.
•SCSI bus connection to each of the base module tape drives: Connect a shared SCSI bus to one of the DLT1 or DLT2 SCSI connectors on each of the base modules with 328215-00X, BN21K, or BN21L cables. Terminate the other DLT1 or DLT2 SCSI bus connection with an HD68 terminator (H879-AA).
You can daisy chain between DLT1 and DLT2 (if present) with a 0.3-meter SCSI bus jumper (supplied with the TL881 or TL891). Terminate the SCSI bus at the tape drive on the end of the shared SCSI bus with an HD68 terminator (H879-AA).
____________________ Notes ____________________
Do not connect a SCSI bus to the SCSI connectors for the library connectors on the base modules.
We recommend that no more than two tape drives be on a SCSI bus.
Figure 8–19 shows a TL891 DLT MiniLibrary configuration with an expansion unit, a base units, and a data unit. The library robotics expansion unit is on one shared SCSI bus and the two tape drives in the base unit are on separate, shared SCSI buses. The data unit is not on a shared SCSI bus as it does not contain any tape drives but tape cartridges only. Note that the pass-through mechanism and cable to the library robotics motor is not shown in this figure.
For more information on cabling the units, see Section 8.12.2.1.2. With the exception of the robotics control on the expansion module, a rackmount TL881 or TL891 DLT MiniLibrary is cabled in the same manner as a tabletop unit.
8–68Configuring a Shared SCSI Bus for Tape Drive Use
