Dell OptiPlex GX1 Installation Manual page 16

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.
General Procedure for Installing SCSI Devices
CAUTION: To avoid the possibility of electric shock, turn off the computer and any peripherals, disconnect them from their
electrical outlets, and then wait at least 5 seconds before you remove the computer cover. Also, before you install an
expansion card, see "Safety First — For You and Your
Configure and install one or more SCSI devices in your computer as follows:
1. Determine which connector on the internal SCSI cable you will attach to each SCSI device.
See "SCSI Configuration
NOTICE: When you unpack the drive, do not set it on a hard surface, which may damage the drive. Instead, set the drive on a
surface, such as a foam pad, that will sufficiently cushion it.
2. Unpack each SCSI device and prepare it for installation.
Configure the device for a SCSI ID number and, if necessary, enable or disable termination. For instructions, see the documentation that
came with the SCSI device and
3. Remove the computer cover as instructed in
4. If you are installing a SCSI host adapter card, configure the adapter card.
For instructions on configuring the card, see the documentation that came with the adapter card and
5. Install the SCSI devices as appropriate.
To install an internal SCSI hard-disk drive, complete steps 3 through 7 of
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Drive Bracket." Then continue with step 5 of this procedure.
To install a SCSI tape drive, CD-ROM drive, or DAT drive, complete steps 2 through 6 of
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Bay." Then continue with step 5 of this procedure.
To install an external SCSI tape drive, continue with step 5 of this procedure.
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6. If you are installing a new SCSI host adapter card, install it in an expansion slot now.
See "Installing an Expansion
If a SCSI host adapter card is already installed, remove, reconfigure, and reinstall the card at this time. See the documentation that came
with the SCSI host adapter card,
Connect the hard-disk drive access cable to the SCSI host adapter card and to the HDLED connector on the riser board (see
Expansion-Card Connectors"). This cable carries a signal from the SCSI host adapter card to the hard-disk drive access indicator on the
computer's front panel whenever one of the SCSI hard-disk drives is accessed.
7. Attach a SCSI cable to each SCSI device.
For additional instructions on connecting SCSI devices, see
NOTICE: You must match the colored strip on the cable with pin 1 on the drive's interface connector to avoid possible
damage to your system.
If you are installing an internal SCSI device, firmly press the SCSI cable's header connector onto the 50- or 68-pin connector on the back of
the device.
The connectors on narrow SCSI cables are keyed for proper positioning. A raised area on the outside of the header connector fits into a
notch on the device connector. The connectors on wide SCSI cables are shaped so that they can be attached one way only.
If you are installing an external SCSI device, connect one end of the external SCSI cable to the SCSI bus connector on the back of the
device.
8. Attach the SCSI cable to the connector on the SCSI host adapter card.
NOTICE: You must match the colored strip on the internal SCSI cable with pin 1 on the adapter card connector to avoid
possible damage to your system.
If you are installing an internal SCSI device, connect the colored edge on the internal SCSI cable to the pin-1 end of the 50-pin
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connector (for a narrow SCSI device) or the 68-pin connector (for a wide SCSI device) on the adapter card, and then press the cable
connector firmly onto the adapter card connector.
If you are installing an external SCSI device, connect the other end of the external SCSI cable to the external connector on the adapter
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card.
Guidelines."
"SCSI Configuration Guidelines."
"Removing the Computer
Card."
"Removing an Expansion
Computer."
Cover."
"Installing an EIDE Hard-Disk Drive in the Hard-Disk
Card," and "Installing an Expansion
"SCSI Cable and SCSI Termination."
"SCSI Configuration Guidelines."
"Installing a Drive in a 5.25-Inch Drive
Card."
"Riser-Board