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Dell PowerEdge 2450 Systems — Installing a Fifth SCSI Hard-Disk Drive
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
SCSI hard-disk drives are supplied by Dell 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 re-install
this bay-and-cage assembly and insert the drive carrier into the hard-disk drive cage.
To install a fifth SCSI hard-disk drive, perform the following steps.
WARNING: Before you perform the procedures in this section, you must
turn off the computer and disconnect it from its AC power source.
WARNING: See your system documentation for important safety informa-
tion before working inside your computer.
1.
Turn off the system, including any attached peripherals, and disconnect the sys-
tem from the electrical outlet.
2.
Open the system covers.
3.
If the optional plastic bezel is installed, remove it.
For more information, see "Checking Inside the System" in your system's
Installation and Troubleshooting Guide.
4.
If a SCSI tape drive or other drive is currently installed in the peripheral bay, dis-
connect the interface and power cables from the drive.
5.
Disconnect all cables connected to the interposer board on top of the peripherals
bay (see Figure 1-1). These cables include the system board interface cable, cool-
ing fan wiring harness, interposer board power cable, and control panel cable
(see Figure 1-2).
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