Step 11 Set Target IDs

Set target identifiers (TIDs) on the SCSI devices. Each device in a specific SCSI channel must have a unique TID in that channel. Non-disk devices (CD-ROM or tapes) should have unique SCSI IDs regardless of the channel where they are connected. See the documentation for each SCSI device to set the TIDs. The MegaRAID controller automatically occupies TID 7 in each SCSI channel. Eight-bit SCSI devices can only use the TIDs from 0 to 6. 16-bit devices can use the TIDs from 0 to 15. The arbitration priority for a SCSI device depends on its TID.

Priority

Highest

 

 

Lowest

 

 

 

 

 

 

 

TID

7

6

5 … 2

1

0 15 14 … 9

8

 

 

 

 

 

 

 

Important

Non-disk devices (CD-ROM or tapes) should have unique SCSI IDs regardless of the channel they are connected to. ID 0 cannot be used for non-disk devices because they are limited to IDs 1 through 6. There is a limit of six IDs for non-disk devices per controller.

Cont’d

Chapter 6 Hardware Installation

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