Rorke Data Galaxy HDX2 GHDX2-2430S-24F4D - Manual (Page 27)

Galaxy GHDX2-2430S/R-24F4D Installation and Hardware Reference Manual
Introduction
1-12
2
1. Warning messages are issued.
2. The subsystem is temporarily held in an idle state.
3. The firmware forces the subsystem to stop serving host
I/O requests.
4. After the failed PSUs are replaced, array administrators
should manually turn the power switch off and then on.
5. If the subsystem is powered on with only one PSU, the
firmware will start the initialization process but stays idle
until at least one other PSU is added.
Table 1-1: Power Supply Safety Restrictions
1.2.8 Cooling Modules
These Galaxy 24 bay subsystems come with two (2) hot swappable, redundant, dual-fan
cooling modules. Two (2) 8cm blowers are housed in each cooling module and provide
ventilation airflow from the front to the rear of the subsystem, extracting the heat
generated by the SATA hard drives and other components.
Intelligent Dual Speed Operation
The fans in the cooling module operate with two rotation speeds. Under normal operating
conditions, the cooling fans run at the low speed, which is sufficient for maintaining an
efficient airflow across components. Under the following conditions, the cooling fans
automatically increase their rotation speed to increase the airflow:
1. Component Failure: if a cooling fan, PSU, or temperature sensor fails, the
remaining cooling fan(s) automatically raises its rotation speed.
2. Elevated Temperature: if the temperature breaches the upper threshold set for any
of the interior temperature sensors, the cooling fans automatically raise its rotation
speed.
3. During the initialization stage, the cooling fans operate at the high speed and
return to low speed once the initialization process is completed and no erroneous
condition is detected.