Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 301)

Error and Notification Messages
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8041 Enclosure voltage over
Event Type
Error.
Cause
Applies to 9750 and 9690SA controllers.
The enclosure power supply voltage is higher than the normal range.
Action
This error is rare. If you see it you may need a UPS or voltage regulator to
stay within the recommended voltage range.
8042 Enclosure voltage under
Event Type
Error.
Cause
Applies to 9750 and 9690SA controllers.
The enclosure power supply voltage is lower than the normal range. This can
be due to a failing power supply or an unreliable power source.
Action
If due to a failing power supply, replace it as soon as possible.
It is recommended to use an uninterruptible power supply (UPS) to protect
against power failures.
8043 Enclosure voltage unknown
Event Type
Warning.
Cause
Applies to 9750 and 9690SA controllers.
The enclosure is not reporting voltage data. This can be due to a failing power
supply.