Dot Hill Systems II 200 FC - Manual (Page 127)

Chapter 8 Troubleshooting Your Array 8-9
If a double drive failure has occurred, it might be possible to recover by performing
the following steps:
1. Discontinue all I/O activity immediately.
2. To cancel the beeping alarm, from the controller firmware’s Main Menu, choose
system Functions → Mute beeper.
See “Silencing Audible Alarms” on page 8-5 for more information about silencing
audible alarms.
3. Physically check that all the drives are firmly seated in the array and that none have
been partially or completely removed.
4. In the firmware Main Menu, choose view and edit Logical drives, and look for:
Status: FAILED DRV (one failed drive)
Status: FATAL FAIL (two or more failed drives)
5. Highlight the logical drive, press Return, and choose view scsi drives.
If two physical drives have a problem, one drive has a BAD status and one drive has a
MISSING status. The MISSING status is a reminder that one of the drives might be a
“false” failure. The status does not tell you which drive might be a false failure.
Caution – Resetting the controller invalidates the data still in write cache. Since it is
impossible to know whether data is in cache or has been written to disk, you should
not reset the controller. Instead, use the “Shutdown Controller” menu option and
choose Yes when the “Reset Controller?” prompt is displayed.
Note –
Shutting down the controller does not guarantee absolute data integrity. It can,
however, restore most of the data, excluding whatever remains in cache when you reset
the controller.
6. From the Main Menu, choose system Functions → Shutdown Controller and then
choose Yes to confirm that you want to shut down the controller.
A status and confirmation message tells you that the controller shutdown is complete
and asks if you want to reset the controller.
7. Choose Yes to reset the controller.
8. Repeat Steps 4 and 5 to check the logical drive and physical drive status.
After resetting the controller, if there is a false bad drive, the array automatically starts
rebuilding the failed logical drive.
If the array does not automatically start rebuilding the logical drive, check the status
under view and edit Logical drives.
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If the status is “FAILED DRV,” manually rebuild the logical drive. Refer to the
SANnet II Family RAID Firmware User’s Guide for more information.