SCSI device location codes
The following are location codes for SCSI devices.
These location codes apply to all SCSI devices including:
- CD-ROMs
- Disks
- Initiator devices
- Read/write optical drives
- Tapes
- Target mode
The location code format is AA-BB-CC-S,L. The AA-BB fields
identify the location code of the SCSI adapter controlling the SCSI device.
| Item | Description |
|---|---|
| AA | A value of 00 for the AA field
indicates the controlling adapter card is located in the CPU drawer or system
unit, depending on the type of system. |
| BB | The BB field identifies the I/O bus and slot
containing the card. The first digit identifies the I/O bus. It is 0 for
the standard I/O bus and 1 for the optional I/O bus. The
second digit is the slot on the indicated I/O bus containing the card. A value
of 00 for the BB field indicates the
standard SCSI controller. |
| CC | The CC field identifies the SCSI bus of the
card that the device is attached to. For a card that provides only a single
SCSI bus, this field is set to 00. Otherwise, a value of 00 indicates
a device attached to the internal SCSI bus of the card, and a value of 01 indicates
a device attached to the external SCSI bus of the card. |
| S,L | The S,L field identifies the SCSI ID and logical
unit number (LUN) of the SCSI device. The S value indicates
the SCSI ID and the L value indicates the LUN. |