Internal Backplane - Infortrend EonStor S12F-R1432 Installation And Hardware Reference Manual

EonStor S12F-R1432/G1433 Installation and Hardware Reference Manual
About the dual-redundant RAID controllers in S12F-
R1432:
There is a Primary-Secondary relationship between the dual-
redundant RAID controllers. The upper RAID controller is
identified as Controller A while the lower controller is identified
as Controller B. By factory default, Controller A is the primary
controller and Controller B the secondary controller.
In normal operation, all array configuration and monitoring
functionality are managed by Controller A. However, to prevent
loss of access by a cabling or controller failure, connect the
serial ports on both controllers to a terminal console using the
included Y-cable and connect both Ethernet ports to your local
network.
If Controller A fails for any reason (hardware error, software
error, removal from system, etc.), then Controller B will take
over and become the primary controller.
If the failed Controller A restarts or a replacement is installed,
Controller A will temporarily assume the role of the secondary
controller.
When the subsystem is rebooted, all system configurations
revert to the default state and Controller B returns the primary
role to Controller A.
․
BBUs: Two (2) BBUs come as the default components for the
dual-controller S12F-R1432. For the S12F-G1433, BBU is an
optional item. When power outage occurs, BBU can protect the
data cached in memory. If its one-year life expectancy is
reached, system administrators will be notified by event
messages.
replaceable. (See Section 1.3.5.)
․
PSUs: Two (2) hot-swappable PSUs provide power to the
subsystem. A power switch is located on each PSU. (See
Section 1.3.6)
․
Cooling Modules: In S12F-R1432, two (2) redundant cooling
modules housed in the PSU modules ventilate the system with
an airflow directed from the front to the rear. In S12F-G1433,
three (3) redundant cooling modules are responsible for the
same ventilation job. (See Section 1.3.7.)
1.2.3

Internal Backplane

An integrated backplane board separates the front and rear sections
of the chassis. This circuit board provides logic level signals and low
voltage power paths. Thermal sensors and I
1-4
BBU is independently accessible and hot-
2
C serial paths are