Seagate Exos CORVAULT Hardware Installation And Maintenance Manual page 63

Table 6 Corrective action for fault conditions (continued)
Symptom
Thermal monitoring and control , continued
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.
Cause
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.
Recommended action
1. 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).
2. Confirm there are no restrictions based on contaminates, such as dust.
Recommendation: Improve removal of contaminates and keep area clean.
3. 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.
4. Verify temperature is within product specifications. Refer to
regulations" on page 82.
Recommendation: Reduce the ambient temperature in the room.
Chapter 6 Hardware installation and configuration issues
"Standards and
63