Hard-Disk Drive Configuration
The four hard-disk drives connected to the main SCSI backplane board are designated as
SCSI ID 0 through SCSI ID 3 (see Figure 1-1). The fifth hard-disk drive is identified as
SCSI ID 4.
To operate the five drives in a 1 x 5 configuration, attach a single SCSI host adapter to
connector SCSIA on the SCSI backplane board. You can also configure the five drives in a
split (1 x 2 and 1 x 3) configuration if you install a second, optional SCSI backplane
daughter card and a second SCSI host adapter. In this mode, the host adapter attached to
connector SCSIB on the backplane controls slots SCSI ID 0 and SCSI ID 1, while the host
adapter connected to connector SCSIA controls slots SCSI ID 2, SCSI ID 3, and the fifth
drive slot, SCSI ID 4.
Installing a Fifth SCSI Hard-Disk Drive
Dell supplies SCSI hard-disk drives in special drive carriers that fit in the hard-disk drive
bays. For a drive carrier to fit in the peripheral bay, you must remove the peripheral bay and
install a special hard-disk drive cage in the bay. You then reinstall this bay-and-cage
assembly and insert the drive carrier into the hard-disk drive cage.
WARNING: Before you perform the procedures in this section, you must turn off
the system and disconnect it from its AC power source.
WARNING: See your System Information document for important safety
information before working inside your system.
Turn off the system, including any attached peripherals, and disconnect the system
1
from the electrical outlet.
Open the system covers.
2
If a bezel is installed, remove it.
3
For more information, see "Removing the Front Bezel" in your system's Installation
and Troubleshooting Guide.
If a SCSI tape drive or other drive is currently installed in the peripheral bay,
4
disconnect the interface and power cables from the drive.
Disconnect all cables connected to the interposer board on top of the peripheral bay
5
(see Figure 1-1). These cables include the system board interface cable, cooling fan
wiring harness, interposer board power cable, and control panel cable (see Figure 1-2).
1-2
Instal ling a Fif t h SC SI Hard- Di sk Dri ve
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