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
	0	4, 5	1	6, 7
	2	0, 1	3	10, 11
	4	2, 3	5	12, 13
	6	8, 9	7	14, 15
Enterprise 6500 only
	14*	0, 1	15*	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).

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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).

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