Dell PowerEdge R300 User Manual

Page 68

Installing System Components

NOTE:

In the preceding figure, the 12C cable is shown connecting over the control

panel cabling. This cable should be routed under the control panel cable and the
internal USB key connector. The 12C cable seats in a cable guide clip that is directly
beneath the control panel connector.

The system board holds the system's control circuitry and other electronic
components. The processor and memory are installed directly on the system
board. Using a riser card, the system can accommodate two expansion cards.
The peripheral bays provide space for up to two hard drives and an optional
optical drive. Power is supplied to the system board and drives through one
nonredundant power supply. The optical drive connects to the SATA
controller on the system board. For more information, see "Optical Drive" on
page 80.

The hard-drive bays provide space for up to two 3.5-inch SAS or two 3.5-inch
SATA hard drives. The hard drives connect to a SAS controller card through
the SAS/SATA backplane board. For more information, see "Hard Drives" on
page 74, "Backplane Boar d" on page 1 01, and "Expansion Cards" on page 96.

During an installation or troubleshooting procedure, you may be required to
change a jumper setting. For more information, see "System Board Jumpers"
on page 157.

system board shroud

redundant power supplies (optional)

left riser

SAS external controller daughter card

SAS RAID external controller
daughter card battery and
memory module

center riser

SAS internal RAID controller
daughter card

SAS card connector

RAC card

memory modules (6)

CPU/heatsink

dual fan module bays 1 and 2 (4 fans)

SAS/SATA backplane cable
connector

SATA/SAS backplane cable

hot plug hard drive bays 0 and 1

one optional slimline drive

LCD control panel

chassis intrusion switch

control panel assembly

power supply
dual fan modules (2 fans)

power distribution board

power distribution board cover

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