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Calling Dr. BOB! formatted raid
One of the vampires who works here formatted one of the raids last night. Luckily he stopped the moment he realized what went wrong. What is the best course of action for recovery?
Mac OSX 10.6.8
Arecca 1221X Card on a MAXX Digital EVO Box Raid 5
8 WD 1TB Black drivesHe formatted it from disk utilities. Then turned everything off called me at 2:30 am and went home. So I am hopping there is not too much damage done. Well besides the fact he FORMATTED IT!
RRRRRR!,
Kevin -
16 Replies
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Try DiskWarrior and cross your fingers. If he really did just reformat the volume and immediately power down, then the data should still be there. Be prepared for the recovery attempt to take a very loooooooong time.
Best,
Andy -
The early superblocks that layout the filesystem geometry are probably gone. So you’ll need a tool that’s smart enough to search past those to later superblock backups that might still have the old HFS geometry. Then whatever data is left can be recovered.
If the inode table was completely destroyed you’re not going to have much luck. If you only lost some of the root inodes (that define the root directory etc), you may end up with a bunch of files in “lost+found” that need to be recovered.
I’d consider a call with the Diskwarrior guys just to discuss whether diskwarrior can do what I described
Steve
Steve Modica
CTO, Small Tree Communications -
Thats a Negative. Disk warrior can only compare the backup Directory table to the primary. When you format both are destroyed. Theoretically I could rebuild the raid, because the parity info is not destroyed, but I need some confirmation on this. Data Rescue can see the data, but it has no Idea what the file names are.
Kevin
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The raid itself was not destroyed. You don’t have to rebuild that. This was a filesystem reformat (disk utility). So the RAID is happy (or should be except that he power cycled it without warning).
So the main issue is superblocks.
In the olden days, we could find a “good” superblock and run mkfs is a recovery mode pointing to that block. It would layout the filesystem again without touching the data itself. Then you could fsck or whatever.Steve
Steve Modica
CTO, Small Tree Communications -
I have put my call into Disk Warrior and I am awaiting a response. I am going to wait until I can get a step by step method from somewhere. i don’t want to further damage it.
Kevin
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You could try Data Rescue, I’ve had success in the past. You will need the space to recover to.
https://www.prosofteng.com/products/data_rescue.php
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I did a preliminary test with that, but It does not recover the file names. 8 TB of QT0001.mov. Blehh!!
Kevin
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Purchase and use R-Studio. Works well to recover raids.
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Still no magic bullet.
Kevin
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Bummer.
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