The Base Module; The Capacity Module; Scsi Interface Configurations - Overland Data DLT LibraryXpress Series Service Manual

The Base Module

Description
The Base Module has one or two DLT drives and a 10-cartridge magazine with a rugged
random access robotic mechanism.
Models
The DLT LibraryXpress Base Module is currently available in six models. The first digit of
the model number refers to the DLT drive model series. The second digit of the model number
denotes the number of drives. The third and fourth digits denote the number of slots in the
module's magazine.
The LXB2110 and LXB2210, using 2000XT series drives, read from and write to the
DLTtape™ (formerly CompacTape®) IIIXT 1/2 inch cartridges, with a native capacity of 15
GB per cartridge. The LXB4110 and LXB4210, using 4000 series drives, can use both
DLTtape IIIXT and higher-density DLTtape IV cartridges. The latter have a native capacity
of 20 GB per cartridge. The LXB7110 and LXB7210, using 7000 series drives, also use the
DLTtape IV cartridges, but provide a native capacity of 35 GB per cartridge. All models can
also read and write DLTtape III cartridges. Both read and write densities are selectable from
the front panel, and under SCSI control from the host.
Note: It is strongly recommended that if you do not equip all Base Modules with the same
drive model, you set up tape grouping via host software. This will avoid tape interchange
problems among drives capable of writing different densities.

The Capacity Module

Description
The LXC5016 Capacity Module has a 16-cartridge magazine, and no tape drives, and a
rugged random access robotic mechanism. The module robotics, under control of the Global
Control Module, moves cartridges between the XpressChannel and any of the 16 cartridge
storage locations.

SCSI Interface Configurations

The DLT LibraryXpress system's standard SCSI interfaces are SCSI-2 for systems equipped
with 2000XT drives and Fast SCSI-2 for systems equipped with 4000 drives. Both of these
use high-density 50-pin D-series connectors. Systems equipped with 7000 series drives, use a
Fast/Wide SCSI interface with high-density 68-pin D-series connectors. The section on SCSI
Interfaces in Chapter 2 - Installation describes the available interface options.
Chapter 1 - Introduction 3