Galaxy GHDXS2-1430R-16F4D Installation and Hardware Reference Manual
1-16
Subsystem
Monitoring
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:
1.
Component Failure: if one cooling fan, a PSU, or a temperature
sensor fails, the remaining cooling fans automatically raise its
rotation speed.
2.
Elevated Temperature: if the temperature reading breaches the
upper threshold set for any of the interior temperature sensors, the
cooling fans automatically raise its rotation speed.
3.
During the subsystem initialization stage, the cooling fans operate
at the high speed and return to lower speed once the initialization
process is completed and that the subsystem has not discovered
any erroneous conditions.
1.4 Subsystem
Monitoring
The RAID subsystem comes with a number of different monitoring
approaches that provide you with continual updates on the status of the
subsystem and individual components. The following monitoring features
are provided with the subsystem.
1.4.1 I
2
C bus
The following RAID subsystem elements are interfaced to the RAID
controller over a non-user-serviceable I
2
C serial bus:
•
PSUs
•
Cooling modules
•
Temperature sensors (for the RAID controller board and backplane
board)
•
Module presence detection circuits
1.4.2 LED
Indicators
The following active components come with LEDs to indicate the status of
individual components. Please refer to
Chapter 4
for more information on
System Monitoring.
•
LCD keypad panel (3 LEDs)
