2.5 Setting SCSI IDs

SCSI IDs identify each SCSI device on the SCSI bus. Each SCSI ID on a given bus must be unique. The IDs are 0 through 15 for a 16-bit bus. The preset host adapter ID setting is 7 which gives the highest priority to the host adapter.

If you plan to boot your computer from a SCSI hard disk drive, you must assign SCSI ID 0 to the drive. Normally, you do not change the host adapter SCSI ID setting from its default value.

Typically, you set the peripheral device SCSI IDs with jumpers or with a switch on the peripheral. You must not duplicate SCSI IDs on a SCSI bus. LSI Logic recommends that you record the SCSI IDs of all SCSI devices. Table 2.1 provides a place to keep this record.

Table 2.1SCSI ID Record for Dual Channel Adapter

 

 

 

SCSI ID

SCSI Device Channel A

SCSI Device Channel B

 

 

 

15

 

 

 

 

 

14

 

 

 

 

 

13

 

 

 

 

 

12

 

 

 

 

 

11

 

 

 

 

 

10

 

 

 

 

 

9

 

 

 

 

 

8

 

 

 

 

 

7

Ultra320 SCSI to PCI Host

Ultra320 SCSI PCI to Host

 

Adapter

Adapter

 

 

 

6

 

 

 

 

 

5

 

 

 

 

 

4

 

 

 

 

 

3

 

 

 

 

 

2

 

 

 

 

 

1

 

 

 

 

 

0

 

 

 

 

 

2-12

Detailed Host Adapter Installation

Copyright © 2002 by LSI Logic Corporation. All rights reserved.