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 SCSI ID of the SCSI device with jumpers or with a switch on the device. 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-X host

Ultra320 SCSI to PCI-X host

 

adapter

adapter

 

 

 

6

 

 

 

 

 

5

 

 

 

 

 

4

 

 

 

 

 

3

 

 

 

 

 

2

 

 

 

 

 

1

 

 

 

 

 

0

 

 

 

 

 

2-12

Detailed Host Adapter Installation

Version 2.1

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