Sun Enterprise 6500/5500/4500 Systems Reference Manual

Disk Board Target IDs

Default SCSI ID Numbers

The default SCSI ID numbers for disk drives on the Disk boards are listed by server type in TABLE C-2.

Table C-2 Disk Board Default SCSI Disk Drive ID Numbers


Board Slot 

Disk 0,1 

Board Slot 

Disk 0,1 

Enterprise 4500 or 5500 


4, 5 

6, 7 



0, 1 


10, 11 


2, 3 

12, 13 


8, 9 

14, 15 

Enterprise 6500 only 



0, 1 


10, 11 

*Enterprise 6500 systems: Disk boards can only be installed in slots 14 and 15. 

Overriding A Default Disk Board Target ID

You can override the default IDs by jumpers on each disk board. Each disk has an ID_ENABLE jumper and four ID jumpers. If the ID_ENABLE jumper is not installed, the disk drive uses the default SCSI ID. If the ID_ENABLE jumper is installed, the disk drive uses the ID specified by the four ID jumpers located on the disk board (an installed jumper indicates a logical 1).

Note -

For Enterprise 4500 and 5500 servers, default disk drive ID numbers are chosen so that IDs 4, 5, 6, and 7 are unlikely to be assigned to disk drives. These IDs are in slots 0 and 1, which are normally taken by a CPU/Memory+ board (slot 0) and an I/O board (slot 1).