Thermal Monitoring And Control; Thermal Alarm - Seagate OneStor SP-3584 Installation & User Manual

5.5.1 Thermal Monitoring and Control

The OneStor enclosure system uses extensive thermal monitoring and takes a number of actions to
ensure component temperatures are kept low and also to minimize acoustic noise. Air flow is from the
front to the rear of the enclosure.
Symptom
If the ambient air is
below 25 °C and the
fans are observed to
increase in speed then
some restriction on
airflow may be causing
additional internal
temperature rise.
Note: This is not a fault
condition.

5.5.2 Thermal Alarm

Symptom
Ops panel module
1
fault LED is
amber.
Cause
The first stage in the thermal
control process is for the fans
to automatically increase in
speed when a thermal
threshold is reached. This may
be caused by higher ambient
temperatures in the local
environment and may be
perfectly normal.
Note: This threshold changes
according to the number of
drives and power supplies
fitted.
Cause
The internal temperature has
exceeded a pre-set threshold.
Action
Check the installation for any airflow
1
restrictions at either the front or rear of
the enclosure. A minimum gap of
25mm at the front and 50mm at the rear
is recommended.
Check for restrictions due to dust build-
2
up. Clean as appropriate.
Check for excessive re-circulation of
3
heated air from rear to the front. Use of
the enclosure in a fully enclosed rack is
not recommended.
Check that all blank modules are in
4
place.
Reduce the ambient temperature.
5
Action
Check that the local ambient
1
environment temperature is below the
specification (see section
A.5, "Temperature and Humidity", on
page 58).
Check the installation for any airflow
2
restrictions at either the front or rear of
the enclosure. A minimum gap of
25mm at the front and 50mm at the rear
is recommended.
3 Check for restrictions due to dust build-
up. Clean as appropriate.
Check for excessive re-circulation of
4
heated air from rear to the front. Use of
the enclosure in a fully enclosed rack is
not recommended.
If possible shutdown the enclosure and
5
investigate the problem before
continuing.
Troubleshooting
41