Re: botched RAID, now e2fsck or what?
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On Wed, 9 Dec 2009 at 20:50, Lucian Șandor wrote: > However, no combination seems useful. Sometimes I get: > "e2fsck: Bad magic number in super-block while trying to open /dev/md0" Did you try specifying a different superblock? If you can remember how the filesystem was initially created, you can use: $ mkfs.ext3 -n /dev/md0 (MIND THE -n SWITCH!) to get a list of the backup superblocks, which you can then use with fsck. Don't forget to man mkfs.ext3 :-) > Question 1: Is there a way to make dumpe2fs or another command > estimate the number of files in what appears to be an ext3 partition? I can only think of: $ dumpe2fs -h /dev/loop0 | egrep 'Inode count|Free inodes' The difference between both values should be the used inodes, i.e. files/directories on the filesystem. > Question: if I were to struck lucky and find the right combination, > would dumpe2fs give me a very-very long list of superblocks? The superblock count depends on how the fs was initially created. I could imagine that the list is longer for a real filesystem, as "garbage" won't have any superblocks at all. > superblocks extend far into the partition, or do they always stop Superblocks are usually spread all over the device. > Question 3: Is there any other tool that would search for files in the > remains of an ext3 partition, and, this way, validate or invalidate > the permutations I try? Have a look at: http://ext4.wiki.kernel.org/index.php/Undeletion Christian. -- BOFH excuse #208: Your mail is being routed through Germany ... and they're censoring us. _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
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