Falcon 24 Dual Fibre Installation and Hardware Reference Manual
A retention screw on the right side of the PSU module secures the PSU to the
enclosure. If the PSU needs to be removed, the retention screw must be removed
first. After installing a new PSU module, make sure that the retention screw has been
firmly secured. The shipping package contains adjustable cable clamps that can be
used to keep the power cords attached to the PSU in case the system experiences
shock or vibration.
PSU specifications are shown in
Appendix A
.
Power Supply Safety Restrictions
No. of Failed PSUs
Responses and Preventive Actions
1.
Warning messages are issued.
2.
Cached data is flushed to the hard drives (also
depends on the Event Triggered configuration
1
settings on the firmware).
3.
If previously configured to the Write-back mode,
the caching mode is automatically switched to the
conservative Write-through mode.
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.
2
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
Part Number:
IFT-9274CFanMod
The FALCON subsystems come with two (2) hot-swappable, redundant, dual-fan
cooling modules (shown in
Figure 1-11
) preinstalled in the subsystem. 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. The two (2) cooling fan modules are installed directly
above the PSUs. (See
Figure 1-5
)
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
1-10
Subsystem Components
