Chapter 9 Hardware installation and configuration issues 89
Symptom Cause Recommended action
Module fault
LED is on
and a storage module
fault LED is on
-or-
A fault condition
related to the
hardware in the rear
panel area
1. Restart the expansion module with a CLI or WBI command..
2. Confirm the redundant storage module is properly functioning.
3. Select one of the following actions:
l
If both have fault conditions, follow shut down instructions and
power off the system enclosure by removing power to both
PSUs. Do not power on until after you successfully replace both
storage modules.
l
If only one storage module is failing, remove power, wait 1
minute, then reset the storage module.
4. If the storage module still has a fault, and the failure is related to a
host port, follow the steps associated with system application faults
below.
5. If the storage module still has a fault, remove the power cord, wait 1
minute, then reseat the storage module.
6. If the storage module still has a fault, replace it within the specified
10 minutes with a new one.
7. If installing a new storage module that still has a fault, remove it,
inspect connections for bent pins, reinstall it, then check the event
log for errors.
Thermal monitoring and control
Module fault
LED is on
and a PSU fault LED is
on
-or-
Internal temperature
exceeds the present
threshold for the
storage enclosure
1. Confirm you have met ambient temperature requirements identified
in the Environmental Requirements section and that the air flow
moves from the front to the rear of the storage enclosure.
2. Confirm you fully closed both main bay and auxiliary bay covers so
latches fully engage.
3. Determine if one of the PCMs failed or is in the process of failing.
Verify all fans are running at a similar RPM. If the impellers of a fan
turn more than 2K RPM slower than the other fan, replace the PCM.
4. Follow instructions related to increases in fan speed, identified
below.
5. Shut down the storage enclosure and investigate before continuing.
Increased fan speed is
greater than 12K RPM
when the ambient
temperature is below
23°C (73.4°F). Factors
such as ambient
temperature, number
of installed drives, and
altitude each influence
fan speed.
Increases in fan speed
are associated with
reaching a thermal
threshold as the first
stage of the thermal
control process. If you
encounter fan speeds
greater than 12K RPM
when the ambient
temperature is below
23°C (73.4°F), the
likely cause is reduced
airflow through the
system.
1. Confirm all hardware is properly installed, all drives are level and
latched, and both drawers are fully closed and latched.
Recommendation: Visually inspect hardware during installation or
replacement to fully engage or secure it.
2. Look for airflow restrictions at the front and rear of the storage
enclosure.
Recommendation: If a rack door blocks airflow by more than 60%,
make sure it has a front minimum gap of 75mm (3 in) and a rear
minimum gap of 152mm (6 in).
3. Confirm there are no restrictions based on contaminates, such as
dust.
Recommendation: Improve removal of contaminates and keep area
clean.
4. Look for excessive re-circulation of heated air from the rear to the
front of the storage enclosure.
Recommendation: Avoid mounting in rack cabinets that are fully
enclosed.
5. Verify temperature is within product specifications. See Standards
and regulations.
Recommendation: Reduce the ambient temperature in the room.
Table 16 5U enclosure corrective action for fault conditions (continued)
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