Chapter 1: Introduction
ES Subsystem Monitoring
1-13
1.5.4 Cooling fan modules
ES U16U subsystems come with two 1U dual-blower, redundant, hot-swappable cooling
fan modules, shown in
Figure 1-13
, pre-installed in the subsystem. Two 9.7cm blowers
are housed in each cooling module and can provide a total of 61 CFM of airflow running
at the speed of 3600rpm. These modules have been designed to generate a cooling
airflow from the front to the rear of the subsystem, which will enable the heat generated
by the SCSI-320 hard drives to be extracted. The cooling fan modules are installed
directly above the PSUs.
Any of the two blowers inside the module can be replaced separately provided that a
faulty unit is quickly replaced and re-installed.
Figure 1-13:
Bottom view of a cooling fan module
1.6. ES Subsystem Monitoring
The ES RAID Subsystem comes with a number of different monitoring methods that
enable users to constantly be updated on the status of the system and individual
components. The following monitoring features are included in the subsystem.
1.6.1 I
2
C bus
The following ES subsystem elements are interfaced to the RAID controller over a non-
user serviceable I
2
C bus:
♦
PSU
♦
Cooling FAN Module
1.6.2 LED
Indicators
The following active components all come with LEDs that indicate the status of the
individual component.
