Chapter 1 About the PFR500/E
18
PFR 500/E Instruction Manual
16 October 2001
Chassis
The chassis is a sheet-metal housing which contains a passive midplane and chassis
slots for the RAID Controllers, or Loop Bypass Boards, disk drives, power supplies,
and the fan modules.
Each chassis includes a chassis address switch on the midplane board that must be set
to a unique address 0 through 9 during installation. Refer to
“Chassis address setting
requirement” on page 26
for information on changing the chassis address.
The following diagram shows how disk drive modules are identified based on the
chassis address and physical location. The chassis with an address set to 0 contains
drives from 0 to 9; the chassis with an address set to 1 contains drives from 10 to 19;
and so forth.
Midplane
The midplane distributes power and signals to all the chassis components. All FRUs
plug directly into midplane connectors. The midplane includes a chassis address
switch that must be set during installation. Refer to
“Chassis address setting
requirement” on page 26
for information on setting the chassis address.
8136-3
n 0
n 1
n 2
n 3
n 4
Disk Modules
PFR500 Front Panel
n 5
n 6
n 7
n 8
n 9
Disk
ID
Chassis
Address
