For 16-bit devices, set the IDs to any unused number between
8 and 15. For 8-bit devices, set the IDs to any unused
number between 0 and 6.
The preinstalled SCSI CD-ROM drive is shipped with
the SCSI ID set to 3.
If the server is shipped with a SCSI hard disk, it's SCSI ID will be
set to 6.
Refer to the instructions supplied with the SCSI devices
for information about setting a SCSI ID.