SCSI IDs
All devices on a parallel SCSI bus must have a SCSI ID, which may be set by jumpers on older devices or in software. The SCSI ID field widths are:
| Bus-width | ID width | IDs available |
|---|---|---|
| 8-bit | 3-bit | 8 |
| 16-bit | 4-bit | 16 |
Read more about this topic: Parallel SCSI