Configuring SCSI Devices
SCSI devices, such as hard disk drives, CD-ROM drives, scanners, and others, must be
configured to be a part of a SCSI chain when installed in a PC. The SCSI chain may have
onlyonedevice,buttheconfigurationisthesameaswhenthechainishosting16or32de-
vices. Figure 19-20 illustrates a SCSI bus with two chains: one internal and one external.
Two essential configuration steps must be performed on all SCSI devices. However,
depending on the manufacturer or the intended use of the device, such as a disk drive to
beusedinaRAID(RedundantArrayofIndependentDisks)configuration,youmayhave
other steps to perform. Check the device’s manual or contact the manufacturer for more
information. The two required steps are as follows: Termination If the new device sits on the end of the SCSI chain, the device
that occupied the end of the chain prior must have its termination disabled,
or you will never see the new device.
Device ID The device ID must be set. This may require changing the setting
of a jumper on the device itself. Check the device’s manual for instructions.Chapter 19: Ports and Connectors^507
Figure 19-20. An example of a SCSI bus in a PC