14
Rear Panel
Single Controller System
Dual Controller System
Number Part
Description
Controller A
This controller module contains the SAS expansion board which
distributes I/O functions to and from the managing RAID system.
This also handles the status of the components via the SAS links
with the RAID system.
Controller B or
dummy cage
This part contains the second controller, also called the redundant
controller. This controller takes over the system functions when
Controller A fails to process.
For single-controller system, this contains a dummy cage.
PSU/Cooling
module
These hot-swappable PSU/cooling modules provide power to the
storage system and ventilates the system.
Power button
This button allows you to turn ON/OFF your storage system.
WARNING!
•
DO NOT remove the redundant components without a replacement on hand.
Internal Backplane
The internal backplane is a circuit board that separates the front and rear parts of the chassis.
This provides logic level signals and low voltage power paths. The thermal sensors and I
2
C
devices are embedded to detect system temperatures and PSU/cooling module’s operating
status. This board is comprised of non-user serviceable components.
WARNING!
•
Accessing the backplane board may lead to serious damage to the system.
•
Physical contact with the backplane board may cause electrocution.
