Dell PowerVault 735N (Rackmount NAS Appliance) - Manual (Page 52)

6-6 Installation and Troubleshooting Guide
Figure 6-4. Inside the System
The system board holds the system control circuitry and other electronic compo-
nents. Several hardware options such as the microprocessors and memory are
installed directly on the system board. The expansion-card cage accommodates up to
three full-length PCI expansion cards. Slot 1 has a PowerEdge Redundant Array of
Independent Disks (RAID) Controller 2/dual channel (PERC 2/DC) card. The two
peripheral bays provide space for a 3.5-inch diskette drive, CD-ROM drive, and a fifth
small computer system interface (SCSI) hard drive.
The hard-disk drive bays provide space for up to five 1-inch SCSI hard-disk drives.
These hard-disk drives are connected to a SCSI host adapter on the system board or
on an expansion card, via the SCSI backplane board.
The power cables leading from the power supply, power-supply distribution board
(PSDB), and interposer board provide power to the system board, SCSI backplane
board, and drives in the peripheral bays.
For non-SCSI drives such as the diskette drive and CD-ROM drive, an interface cable
connects each drive to the interposer board, or to an expansion card.
During an installation or troubleshooting procedure, you may be required to change
a jumper or switch setting. For information on the system board jumpers, see
Appendix A, “Jumpers, Switches, and Connectors.”
system board
microprocessors
power supplies (2)
cooling fans (3)
hard-disk
drive bays (5)
power-supply distribution board
combination diskette
drive and IDE CD-ROM drive
expansion-card cage
interposer board
PERC 2/DC
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