Quantum QXS Series Hardware Installation And Maintenance Guide

86Chapter 9 Hardware installation and configuration issues
Symptom Cause Recommended action
Module fault LED is on
and fault LEDs for both
PCMs are on
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. Remove the PCM with the fault, wait 1 minute, then reseat it.
3. Determine if only 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, including blanks.
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 15 2U enclosure corrective action for fault conditions (continued)
Take corrective action for 5U enclosures
After you follow the process above and isolate the fault to an area of the storage enclosure or to a particular
module, use the following chart to determine the type of corrective action you should take.
Symptom Cause Recommended action
Operator's (ops) panel fault LED for logical faults
Logical fault LED is on A fault condition
related to the system
application logic
1. Scan the enclosure event log for specific information for the fault.
2. For system application faults, see Isolate system application faults.
3. If the above actions do not resolve the fault, isolate the fault to the
failing component identified in the rear panel area and follow the
instructions below.
Table 16 5U enclosure corrective action for fault conditions

Quantum QXS Series Specifications

General

Brand	Quantum
Model	QXS Series
Category	Storage
Language	English