1-3
EonStor GSa 3000 Series Hardware Manual
1.2.2 Rear panel
Single controller system
Dual controller systems
1.2.3 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.
Number
Part
Description
11
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.
11
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.
11
PSU/cooling
module
These hot-swappable modules provide power to the storage
system and each module has a built-in fan.
11
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.
