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RAID Failure 6/9/2013 7:29:06 AM

Backups are still the most basic and important tasks performed by a DBA. 

Recent case in point, received this from a SAN Administrator:

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I just spoke with {vendor named removed}, we have had a triple hardware failure on the array. {Vendor} is in the process of replacing 3 drives at this time.

 

Apparently we had one drive fail, and while that drive was transitioning to a hot spare, a second drive in the same RAID group failed. The array wasn’t able to handle the double simultaneous failure. {Vendor} attempted to follow procedures when replacing the drives to restore the data, but they were unable to, and all the affected data was lost.

 

Currently {Vendor} is following a process that will eventually make the LUNs available to the servers as they were before, but these LUNs will be empty, all data on them has been lost.

 

We’ll work with {Vendor} to get a root cause analysis completed, but all data that was on the affected storage will have to be manually replaced.

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Always make sure you have your backups.

 


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