Troubleshooting guide

7-16 Dell OptiPlex GX1 and GX1p Midsize Managed PC Systems Reference and Installation Guide
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If you are installing an internal wide SCSI device (such as a wide SCSI hard-disk
drive)
, you have a 68-pin internal SCSI cable as shown in Figure 7-13. One end of
this cable attaches to the SCSI host adapter and the other two connectors attach
to up to two SCSI hard-disk drives installed in the hard-disk drive brackets.
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If you are installing an external SCSI device
, you have a shielded external cable
that connects to the external SCSI connector on the SCSI host adapter card. You
have a separate power cable to connect the SCSI device to an AC power source.
Before installing SCSI devices in your computer, you may need to configure the termi-
nation on your SCSI devices. Both types of internal SCSI cables contain terminators
on the device end of the cables, so the devices connected to these cables must have
termination disabled. External SCSI cables do not have terminators, so termination
must be enabled on the SCSI device itself.
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If you are installing only internal SCSI devices, verify that termination is enabled on
the SCSI host adapter and disabled for all other internal SCSI devices. If you are
installing both internal and external SCSI devices, verify that termination is enabled on
the external SCSI device and disabled for the SCSI host adapter and all internal SCSI
devices.
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Configure and install one or more SCSI devices in your computer as follows:
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See “SCSI Configuration Guidelines” found earlier in this section.
68-pin SCSI cable
(to hard-disk drive)
50-pin SCSI cable
(to device in externally
accessible drive bay)