Device Termination - Dell 2200 Service Manual

1-8 Dell PowerEdge 2200 Systems Service Manual
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The drive you intend to use as your boot device should be configured as SCSI
ID 0. You can configure any additional hard-disk drives to any of the still-
available SCSI ID numbers.
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If Dell installs additional SCSI hard-disk drives in the system, they will be
configured as SCSI ID 1 and SCSI ID 2.
NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or
that devices be attached to the cable in order by ID number.

Device Termination

Before installing SCSI devices, you must configure the termination on the
device(s) and for the built-in SCSI controller.
SCSI logic requires that termination be enabled for the two devices at opposite
ends of the SCSI chain and disabled for all devices in between. Therefore,
regardless of whether you are installing internal or external devices, use the fol-
lowing guidelines:
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The built-in SCSI controller has active termination—no action is required.
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Termination is set on the SCSI hard-disk drive installed in the left bay of the
internal drive bays when the drive is installed by Dell. Termination should
be disabled on any other drives installed in the internal bays. Figure 1-5
shows where the termination jumper should be located on the Dell-supplied
2-gigabyte (GB), 4-GB, and 9-GB SCSI hard-disk drives for the PowerEdge
2200 system.
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If you install an optional SCSI controller card to control the CD-ROM drive
and any other SCSI device in the externally accessible drive bays, you must
enable termination for the SCSI controller card and the SCSI device at the
end of the SCSI interface cable (preferably the CD-ROM drive). See the
documentation that came with your SCSI controller card for instructions.
Figure 1-5 shows an example of a SCSI termination jumper on a CD-ROM
drive.
CAUTION: When you install or remove a termination jumper, do not
move or remove any other jumpers installed on the drives or data may
be corrupted during transmission.