Chapter 1 - Getting Started
Cooling Fan Module
8
Cooling Fan Module
The enclosure has temperature sensors in three different areas, the drive bay, the
RAID Controller, and the power supplies. There are several steps the storage
system performs to prevent component damage due to over temperature
conditions.
If the drive bay area reaches a temperature of 50°C (122°F) an audible alarm will
sound, the front panel Fan Status LED will flash alternately amber then green, and
the monitoring software will post a warning message. These events are interpreted
by SAF-TE and report in the form of notifications which give the user a warning
that a condition is causing the enclosure temperature to exceed the preset
maximum allowable value, and an action is required by the user to determine the
cause and take corrective measures. It may be due to a blockage of air flow or a
low fan speed.
If the RAID Controller reaches a temperature of 65°C (149°F) an audible alarm will
sound, the front panel Fan Status LED will flash alternately amber and green, and
the monitoring software will post a warning message. If the temperature on any
RAID Controller continues to rise and reaches 71°C (159°F) the controller will flush
its cache and shutdown. The controller will also spin down the disk drives at this
temperature.
If a power supply reaches 85°C (185°F), it will shut down.
Fan Speed Override Control
Jumpers JP1 (Fan 0)
and JP2 (Fan 1)
4700S.book Page 8 Wednesday, April 6, 2005 2:14 PM
