The Data Unit; Scsi Interface Configurations; Scsi Bus Performance Considerations; Figure 1-3. Data Unit Front View - Compaq SW TL881 DLT Mini-Lib/1 Manual

The Data Unit

The Data Unit (Figure 1–3) has a 16-cartridge magazine, a random access
robotic mechanism, and no tape drives. The module robotics, under control of
the Expansion Unit, moves cartridges between the Pass-Thru Mechanism and
any of the 16 cartridge storage locations.

Figure 1-3. Data Unit Front View

16-Cartridge magazine
Magazine security lock
Control panel

SCSI Interface Configurations

Systems are equipped with DLT 20/40 drives use a narrow SCSI interface
using high-density 68-pin D-series connectors. The section on SCSI Interfaces
in Chapter 3, Installation, describes the available interface options.

SCSI Bus Performance Considerations

Data Transfer Rate
The data transfer rate of the MiniLibrary is dependent on the type and number
of drives and on the SCSI bus configuration. The bandwidth of the SCSI bus is
limited. As a result, the transfer rate of drives such as the DLT20/40 can be
limited by sharing a SCSI bus with another disc drive on tape. It is
recommended that the MiniLibrary be installed on its own controller for
optimum performance.
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Unlock /Open button
Locked indicator
Power switch
Introduction 1-5
SHR-1194