Storage Shelf Rear Panel; Cables - VERITAS NetBackup 5240 Hardware Installation Manual

12 Hardware overview

Storage shelf rear panel

Storage shelf rear panel

Cables

3. The Module Fault LED is on when there is a system hardware fault. A Power
Cooling Module (PCM) or an I/O module may be at fault.
4. The Logical Status LED shows a change of status or a fault, typically associated
with the shelf's disk drives. This LED also indicates an issue with an internal
RAID controller or external RAID controller, or with a host bus adapter.
5. The Unit Identification Display provides information to assist in the configuration
of multiple storage shelves.
The rear panel of the storage shelf contains two main components; two Power
Cooling Modules (PCMs) and two I/O Module canisters.
The PCMs, located on the left and the right sides of the storage shelf, contain fans.
The I/O module canisters are located in the center of the rear panel, one above the
other. Each I/O module contains three SAS-3 ports; A, B, and C. The SAS ports
connect the I/O modules to the appliance and to other storage shelves. Note that
the port labels are reversed on the bottom canister. Port C is not used at this time.
The PCMs and the I/O modules include LEDs.
Two power cables are shipped with each appliance and each storage shelf.
1m SAS-3 cables are shipped with each storage shelf. The one-meter cables are
sufficient when the recommended cabling scheme is followed. 3m SAS-3 cables
are available separately in case of need.