User`s guide

EK–TL891–UG. A01 1–1
1
Introduction
The DLT MiniLibrary Base Module is the foundation of an expandable, modular tape
library system. The MiniLibrary system is designed for high duty-cycle on-line and near-
on-line applications, such as hierarchical storage management (HSM). It is a superior
performer in high volume backup and archival service as well.
1.1 Models
The DLT MiniLibrary Base Module is available as a TL891 model that can be
upgraded to a two drive TL892. Both models can use either CompacTape III,
CompacTape IIIXT and higher-density CompacTape IV cartridges. Both types of
media are rated at over 1,000,000 head passes.
The Base Module contains one TZ89N DLT tape drive plus a 10-cartridge
magazine with a rugged random access loader mechanism. The third digit of the
model number (1) denotes the number of drives in the unit.
1.1.1 SCSI Interface Configuration
The Base Module’s standard SCSI interface is standard fast SCSI with SCSI-2
(high-density 68-pin D-series) connectors. The section on Interfaces in Appendix
B - Installation describes the available interface options.
Data Transfer Rates:
The data transfer rate of the DLT MiniLibrary is dependent on the type of drives
and on the SCSI bus configuration. The bandwidth of the SCSI bus is limited. As
a result, the transfer rate of exceptionally fast drives such as theTZ89N series can
be limited by sharing a SCSI bus with another drive or with the library robotics.
Internal Cabling Configuration:
Each model is available in a daisy-chained SCSI configuration, or with separate
SCSI connections for the library robotics and each of the drives. These
configurations are described in more detail in Appendix B - Installation.