F Unit Operational; Downgrade Udma Mode - 3Ware 9650SE-2LPML User Manual

Chapter 12. Troubleshooting

001F Unit Operational

0021 Downgrade UDMA mode

236
• 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.
The controller only generates this message if the unit is missing drives
Note:
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.
Do not delete the inoperable unit and recreate it as this will
CAUTION:
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.
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.
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.
3ware Serial ATA RAID Controller User Guide