NAS540: Volume down, repairing failed, how to restore data?
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Here it is, sir :~ # e2fsck -n /dev/md2e2fsck 1.42.12 (29-Aug-2014)Warning! /dev/md2 is in use.ext2fs_open2: Bad magic number in super-blocke2fsck: Superblock invalid, trying backup blocks...e2fsck: Bad magic number in super-block while trying to open /dev/md2The superblock could not be read or does not describe a valid ext2/ext3/ext4filesystem. If the device is valid and it really contains an ext2/ext3/ext4filesystem (and not swap or ufs or something else), then the superblockis corrupt, and you might try running e2fsck with an alternate superblock:e2fsck -b 8193 <device>ore2fsck -b 32768 <device>0
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Good news!
I finally have my data back!
I tried to recover the superblock index with e2fsck using backups listed, but none of them worked
So I decided to come back to the old plan and try again logical devs combinations.
The procedure I followed is this one : 1) Deactivating the volume with vgchange -an 2) Stop md2 3) Create array with new combination
And when I arrived at C / B / D / A and rebooted, NAS is finally gives my data back.
I'm really happy now, thanks to everyone involved.
Good Luck and all the best!
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Thanks ksr7. Your response helped me.0
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