Drive Replacement And Installation Considerations; Replacing A Drive In The Bottom 5.25 Inch Rack Position; Replacing And Installing Drives In The Raid Rack - Power Computing PowerTower Pro User Manual

Chapter 7, Installing Internal Drives
Place the crossbar assembly, the expansion slot cover, and the screws in a safe place
where you will be able to Þnd them later.

Drive replacement and installation considerations

Before installing a drive in the computer, you should Þrst consider the best location for its
purpose. Obviously, a 5.25 inch drive must be installed in the 5.25 inch drive rack. If you
are installing a 3.5 inch drive, it may go in any drive bay, although it will require a 3.5 to
5.25 inch drive adapter if it is installed in a 5.25 inch bay.
If a 3.5 inch hard drive is installed in the RAID rack, and there are no available SCSI cables
to connect to it, then it must be connected to the external bus, which operates at 5 MB/sec.
(For a discussion of how the SCSI bus on your computer is set up, see ÒUsing SCSI
devices,Ó starting on page 16. Pay particular attention to the discussion of SCSI termination,
discussed in ÒEnsuring proper terminationÓ on page 17.)
Another consideration is power. The power supply for the computer will support a total of
nine internal drives, including the ßoppy drive. Do not exceed a total of nine such drives in
the internal drive bays, and do not exceed the power consumption levels speciÞed in ÒPower
requirementsÓ on page 159. Additional external drives, with their own power supplies, are
Þne, however.
Therefore, after deciding where you want to install the drive, refer to the appropriate section
for instructions on:
ÒReplacing a drive in the bottom 5.25 inch rack positionÓ on page 110
ÒReplacing and installing drives in the upper 5.25 inch rack positionsÓ on page 119
ÒReplacing and installing drives in the front 3.5 inch rack positionsÓ on page 130
ÒReplacing and installing drives in the RAID rackÓ on page 135

Replacing a drive in the bottom 5.25 inch rack position

1.
If you are replacing the bottom front primary hard drive, the front 3.5 inch
drive bay rack, which is below the 5.25 inch drive bays, must Þrst be
removed.
110
PowerTower Pro UserÕs Guide
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