User`s guide

Installing Optional Disk and Tape Drives
7-3
Setting IDs and Termination
• Each device on the channel must be assigned to a unique SCSI ID
number. The narrow SCSI bus supports eight devices in the range
of 0-7.
• The wide SCSI bus supports 16 devices in the range of 0-15. In
either bus, the SCSI ID “7” usually is assigned to the SCSI host
adapter. This can be changed in the configuration utility.
• Both ends of the SCSI bus must be terminated. In most cases, one
side of the termination will be a soft switch setting on the SCSI
host adapter, set in the configuration utility. The other termination
can be found on a SCSI device as a jumper setting, the last
connector of a bus cable using an in-line SCSI terminator, or a
Digital terminator located on the SBB backplane.
• If a device such as a CD-ROM drive has a terminator jumper
installed and the CD-ROM drive is plugged into the second
connector on the cable from the SCSI host adapter, no other
devices will be seen beyond the second connector.