Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 298)

Chapter 12. Troubleshooting
286 3ware SATA+SAS RAID Controller Card Software User Guide, Version 10.2
Action
Check the operational status of the temperature sensor. If it has failed, replace
it.
See your enclosure documentation or contact your enclosure manufacturer for
more information.
8030 Enclosure power normal
Event Type
Information.
Cause
Applies to 9750 and 9690SA controllers.
The enclosure power supply is now back within the acceptable range.
Action
None required.
8031 Enclosure power fail
Event Type
Error.
Cause
Applies to 9750 and 9690SA controllers.
One of the enclosure power supplies is not working. Either a power supply
has failed or a cord is unplugged.
Action
Reseat the power supply cord. Replace any failed power supply as soon as
possible.
It is recommended to use an uninterruptible power supply (UPS) to protect
against power failures.