Chapter 2

3.If more than one device in the library is on the same bus, place a jumper between the appropriate connectors.

4.For each device that terminates the bus (either the library or one of the tape drives), install a terminator on one of the connectors for that device. See the following section for an example of a wide SCSI library connected to two buses.

Example: Wide library on two SCSI buses

￿On SCSI Bus A, a cable connects the host to the library, and jumpers connect the library to Drive 1, and Drive 1 to Drive 2. Bus A is terminated with an external terminator installed on the lower connector for Drive 2.

￿On SCSI Bus B, a cable connects a second host to Drive 3, and a jumper connects Drive 3 to Drive 4. A cable connects Drive 4 to the other devices on Bus B.

Bus A

Bus B

Host for

Bus A

Host for

Bus B

other devices

on Bus B

Library

Drive 1

Drive 2

Drive 3

Drive 4

SCSI

 

SCSI

connector

 

cable

SCSI

jumper

Terminator

42

Exabyte 440 and Exabyte 480

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Image 56
Exabyte 480, 440 manual Example Wide library on two Scsi buses, Bus a Bus B