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Sun StorEdge™ L25 Tape Library and Sun StorEdge™ L100 Tape Library Installation Guide

Document 6423015-01, Ver. 1, Rel. 0

June 2002

34 Connecting the Library to the Host Computer

Connecting the Library to the Host Computer 0

The library robotics and tape drives are independent SCSI devices with

independent SCSI connections. The L25 and L100 provide two 68-pin

high density connectors for each device. You can connect these devices

to a single SCSI bus or divide them between two or more SCSI buses.

To connect the library or libraries to the host computer(s), refer to the

following sections:

• SCSI Cabling Guidelines

• Terminator Power

• SCSI Cabling Diagrams

SCSI Cabling

Guidelines

0

Refer to these SCSI cabling guidelines when completing the SCSI

cabling:

• Each device on the SCSI bus must have a unique SCSI ID. The

default settings for the L25 are: library robotics = 0, tape drive 1 = 1,

tape drive 2 =2. The default settings for the L100 are: library

robotics = 0, tape drive 1 = 1, tape drive 2 = 2, tape drive 3 = 3, tape

drive 4 = 4, tape drive 5 = 15, tape drive 6 = 14. You can change

these SCSI ID settings using the

Drive ID and Library ID options on

the GUI

Configuration screen.

• Termination must be provided at each end of the SCSI bus (see

Terminator Power

).

• All SCSI cables must be shielded or double shielded to meet EMI

specifications.

• The maximum total SCSI bus length for an HVD SCSI bus is 82 feet

(25 meters).

Terminator Power 0

External terminators must be installed at the end of each SCSI bus.

Power for the terminator must be supplied by at least one device on

the SCSI bus.

In the factory default configuration, the library robotics supplies

terminator power. You can turn this terminator power off using the

Terminator Power option on the GUI Configuration screen.