Apple Workgroup Server 6150/66 - Manual (Page 52)

If you have an Apple SCSI device, set the SCSI ID number as follows:
1 Make sure that the server and SCSI device are turned off.
2 Choose a number between 0 and 6 that doesn’t duplicate the ID of any other SCSI device
connected to your server.
The startup disk’s ID number is preset to 0 and the CD-ROM drive’s ID is
preset to 3. (The server itself has the ID number 7.) Therefore, the ID numbers
that can be assigned are 1, 2, 4, 5, and 6, as shown in the following figure.
3 Locate the ID number switch on the back of your SCSI device.
4 Push the ID switch repeatedly until the number you want appears.
On some SCSI devices, the ID number switch is inside a small hole. Insert a
straightened paper clip to push the switch.
SCSI ID switch
4
4
Startup
disk
0 2 3 4 5 1 6
SCSI ID numbers
CD-ROM
drive
36 Chapter 3 / Expanding Your Server and Connecting Other Equipment