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Bring Raid 10 array drives back online.

Tags:
  • NAS / RAID
  • Storage
  • Power
Last response: in Storage
June 16, 2014 10:55:11 AM

Multiple power outages have caused problems with my RAID 10 array. First, one drive indicated that it was degraded, then all 4 drives were indicated as being offline. I would like to get them back online without destroying my data. Would I be able to run the ICH9 utility that displays just before bootup and rebuild the array without destroying the data on the disks? Even then, I would need to bring the drives back online first. My operating system (Win 7 pro) is on a SSD and not the RAID array, so I can still boot up the computer.

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a c 143 G Storage
June 16, 2014 11:47:46 AM

"Would I be able to run the ICH9 utility that displays just before bootup and rebuild the array without destroying the data on the disks?" No If you rebuild the raid, it looks at it like a new array, and will destroy any data on the disks.

You want to force the existing disks back online. In that ICH9 utility there should be a way to look at the current setup, and it should show disks offline, and you want to change them to online. You may need to look at the manual for exact instructions.
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a c 75 G Storage
June 16, 2014 1:17:00 PM

ss202sl said:
"Would I be able to run the ICH9 utility that displays just before bootup and rebuild the array without destroying the data on the disks?" No If you rebuild the raid, it looks at it like a new array, and will destroy any data on the disks.

You want to force the existing disks back online. In that ICH9 utility there should be a way to look at the current setup, and it should show disks offline, and you want to change them to online. You may need to look at the manual for exact instructions.


I'm sorry, but this is a really bad idea. An array that was running in a degraded state and then went offline altogether is almost certainly going to have the wrong two drives be physically unstable, and forcing them online to do a rebuild WILL cause irreversible data loss.

At this point, you should make image of all the drives and ONLY work with the image drives you create to rebuild from.
Anything you do with the original drives, especially considering you don't know anything about their physical condition, will have a HUGE risk of making things work and be unlikely to resolve itself without professional help.

Rule #1 of a failed RAID is:
NEVER attempt a rebuild from the original drives. and MAKE IMAGES FIRST.
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