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Old 10-02-2007, 04:16 PM   #1
Cadmium
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Registered: May 2004
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Bad magic number in super-block


Hi,

After a power failure, I can't mount one of my partitions anymore:

--
fsck.ext3 /dev/sdb1
e2fsck 1.39 (29-May-2006)
Couldn't find ext2 superblock, trying backup blocks...
fsck.ext3: Bad magic number in super-block while trying to open /dev/sdb1

The superblock could not be read or does not describe a correct ext2
filesystem. If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
--

I tried to give the suggested superblock (as well as some other guessed values) as parameter but I get the same error message. With dumpe2fs and tune2fs as well.

Anything I can try to mount the partition again?

Cd
 
Old 10-02-2007, 07:29 PM   #2
syg00
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Erk - instead of guesssing, use mkfs with the "-n" option. It'll tell you the actual superblock locations.
Then try a couple.

If all bad, reformat and restore might be your only option.
 
Old 10-03-2007, 01:50 AM   #3
Cadmium
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Registered: May 2004
Posts: 31

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For the records: I solved my problem. With fdisk -l I discovered that the partition I was trying to mount was a Windows partition. The weird thing is that /dev/sdb1 used to be a Linux partition. Thinking of it again, I had to pull apart my computer after the crash and I probably shuffled the disks around.
But in short, the partition I was looking for is now in /dev/sdc1 and updating the partition table solved it all.

Thanks & cheers
Cd
 
  


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