Chapter 12. Troubleshooting
236
3ware Serial ATA RAID Controller User Guide
•
A RAID 10 unit with both drives missing from one of the RAID 1
subunits.
•
A RAID 6 unit with three or more drives missing.
Note:
The controller only generates this message if the unit is missing drives
for more than 20 seconds. This allows a hot-swap of a drive to be completed
without generating this error.
Action
The unit is no longer available for use. Return all missing drives to the unit. If
the drives are physically present, check all data and power connections.
CAUTION:
Do not delete the inoperable unit and recreate it as this will
overwrite the data and make data recovery very difficult.
You may wish to contact technical support at
http://www.3ware.com/support
.
See Also
“About Inoperable Units” on page 138.
001F Unit Operational
Event Type
Information
Cause
Drive insertion caused a unit that was inoperable to become operational again.
Any data that was on that unit will still be there. This message is only sent if
the unit was inoperable for more than 20 seconds. That means that if the hot-
swap of a drive occurred within 20 seconds, messages are not generated.
Action
None Required. The unit is available for use.
0021 Downgrade UDMA mode
Event Type
Warning
Cause
The 3ware RAID controller has downgraded the UDMA transfer rate between
the controller and the ATA disk drives. This message only applies to parallel
ATA and certain legacy serial ATA drives.
