The unique address of a SCSI device. SCSI IDs range from 0 to 7 fOR 8-bit SCSI systems, 0 to 15 fOR 16-bit and 0 to 31 fOR 32-bit systems. The SCSI adaptOR is usually assigned ID 7. A device' s SCSI ID is often set by switches on the device. (1999-09-01)