DataDirect Networks EF2800, User Manual

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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
T r o u b l e s h o o t i n g a n d P r o b l e m S o l v i n g
10.4.3 Thermal Control
The EF2800 Enclosure 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 front to rear of the
enclosure.
Symptom Cause Action
If the ambient air is
cool (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.
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.
1.
Check the installation for
any airflow restrictions at
the front and rear of the
enclosure. A minimum gap
of 1" (25mm) at the front and
2" (50mm) at the rear is
recommended.
2.
Check for restrictions due
to dust build-up, clean as
appropriate.
3.
Check for excessive re-
circulation of heated air
from rear to the front. Use in
a fully enclosed rack
installation is not
recommended.
4.
Check that all blank/
dummy modules are in
place.
5.
Reduce the ambient
temperature.