Chapter 1: Introduction
Model
No. of
cooling
modules
No. of
fans in
each
module
Location of
cooling
modules
No. of
status
LEDs
Location
of status
LEDs
S12E-R1132-4 2
2
Refer
to
Figure 1-4
2 On
PSU
faceplates
S12E-G1133-2 3
1
Refer
to
Figure 1-5
1 On
cooling
module
faceplates
Intelligent Dual Speed Operation
The cooling fans in the cooling module operate with two rotation
speeds. Under normal conditions, the cooling fans run at the low
speed, which is sufficient for maintaining airflow across components.
Under the following conditions, cooling fans raise their rotation speed
to increase airflow:
․
Component Failure: if one cooling fan, a PSU, or a temperature
sensor fails, the remaining cooling fans automatically raise
their rotation speed.
․
Elevated Temperature: if the temperature reading breaches the
upper threshold set for any of the interior temperature sensors,
the cooling fans automatically raise their rotation speed.
․
During the subsystem initialization stage, the cooling fans
operate at the high speed and return to low speed once the
initialization process is completed and that the subsystem has
not discovered any erroneous conditions.
1.4 Subsystem
Monitoring
The iSCSI RAID subsystem comes with a number of different
monitoring methods that provide you with continual updates on the
operating statuses of the subsystem and individual components. The
following monitoring features are included:
1.4.1 I
2
C bus
The following subsystem elements are interfaced to the RAID
controller over a non-user-serviceable I
2
C bus:
․
Cooling modules
1-17
