User`s guide

Server Peripherals Overview
9
3.5-inch Hard Drive Bays
The chassis containsone hard disk drivebay thatholds 3.5-inch-wide (1”high or1-5/8”
high) LVDS SCSI drives with internal cabling. The backplane is hot-swap-capable and
can accommodate either six 3.5-inch-wide (1” high) hard drives (or three 1-5/8” high
harddisks).Thedrives areaccessed externallyfromthefrontofthesystem.Contactyour
sales or service representative for information on obtaining additional disks or drive
carrier assemblies.
Aspart of the hot-swapimplementation, an integraldrive carrier and heatsinkassembly
is required for the hard disk drives. The drives are mounted in the carrier/heatsink
assemblywithfourscrewsandthecarriersnapsintothe chassis.Forinformationonhow
to install the carrier/heatsink assemblies, see “Mounting a SCSI Hard Disk Drive in a
Carrier” in Chapter 5.
A single metal EMI shield and plastic door cover the hard drive bays. Drives can
consume up to 22 watts of power and must be specified to run at a maximum ambient
temperature of 55 °C.
The system was designed to use an optional Redundant Array of Independent Disks
(RAID). A software implementation with onboard SCSI or an add-in board can be used
to set up RAID applications.Ask your sales or service representative for information on
installation and use of RAID options.
5.25-inch Removable Media Device Bays
The chassis has three 5.25-inch half-height bays that are accessible from the front of the
system. Thesebays are intended to provide spacefor optionalremovable media devices.
You can convert the 5.25-inch bays to a single full-height bay. We recommend that you
do not use these bays for hard disk drives, because they generate EMI (increasing ESD
susceptibility), and because of inadequate cooling. To maintain compliance with
electromagnetic compatibility (EMC) regulations, each 5.25-inch drive bay must be
configured with either:
• An EMC-compliant 5.25-inch peripheral device, or
• A metal cover plate, available from your sales or service representative