84 Hot-Swapping Fans, SCSI Hard Drives, and Power Supplies
Hot-Swapping a SCSI Hard Drive

Hot-Swapping Bays

Two 3.5-inch hot-swapping bays provide space for 3.5 inches X 1 inches (or 1.6 inches) single
connector attachment (SCA2) SCSI hard disk drives. You can install up to two industry-standard
wide/ultra or wide/ultra2 SCA-type hard disk drives in these bays.
The power supply fans provide cooling for the hot swap drives. A system with two power supplies
is capable of cooling most drives that would be installed into the system. However, drives that
dissipate a large amount of power might require three power supplies to ensure proper cooling.
See the product specifications to determine if the particular drive to be installed needs the
additional cooling provided by a third power supply.
Carriers for 3.5-inch wide 1-inch or 1.6-inch height drives allow easy hot-swapping of drives in
and out of these bays without shutting down the server.
You can easily set up RAID† applications if you install a Redundant Array of Inexpensive Disks
(RAID) controller board on the PHP I/O carrier, RAID software, and SCSI hard disk drives in the
hot-swapping bays.

SCSI SCA Hard Disk Drives

The server supports a variety of single-ended SCSI SCA-type hard disk drives. As shipped from
the supplier, the server might not contain any drives. Contact your sales representative or dealer
for a list of approved drives that can be installed in the server.

Mounting a SCSI SCA Hard Disk Drive in a Carrier

See Figure 16 and Figure 17 (page 85).
1. Remove the 3.5-inch hard disk drive from the protective wrapper, and place it on an antistatic
surface.
2. Record the model and serial numbers of the drive in your equipment log.
3. Orient the drive carrier so that the handle is toward your left and the metal EMI/ESD fingers
are toward your right.
4. Orient the drive so that:
• The drive’s label faces away from the carrier heatsink, toward the carrier fingers
• The drive’s connector faces away from the carrier handle
CAUTION
Be careful not to bend or damage the carrier’s metal fingers as you attach the
drive to the carrier.
5. Position the drive in the end of the carrier away from the handle, then slide the drive toward
the handle.