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Topic: Dolby Show Store down failed array
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Marcel Birgelen
Film God
Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012
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posted 01-25-2014 08:37 PM
If your RAID controller reports a RAID 0 container, where once a RAID 5 container used to live, I would rather suspect the controller than just the disks. The situation could still have been triggered by a double disk failure, but it should not happen. If the second disk in a RAID 5 array fails, the data becomes inaccessible, but the controller should not go haywire.
RAID controllers do not conform to some kind of standard, but most of them save the essential parts of the RAID configuration both in NVRAM and as metadata on the disks itself (usually on all the disks, so a singe disk would be sufficient to get at least the configuration back). The NVRAM configuration is useful in cases where no disks show up, because of e.g. a backplane failure. The data on the disks can be used if the controller needs to be swapped, the new controller can then read the metadata and "import" the existing array.
In some cases, a failed RAID array can be (partially) restored by forcing a rebuild. If it works, you should back up all your essential stuff and still get new disks and rebuild the array from scratch.
Alternatively, there are also data recovery services, but I doubt that would be even remotely useful for data on a Show Store.
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