1ext2fs_open2: The ext2 superblock is corrupt
2../e2fsck/e2fsck: Superblock invalid, trying backup blocks...
3../e2fsck/e2fsck: The ext2 superblock is corrupt while trying to open test.img
4
5The superblock could not be read or does not describe a correct ext2
6filesystem.  If the device is valid and it really contains an ext2
7filesystem (and not swap or ufs or something else), then the superblock
8is corrupt, and you might try running e2fsck with an alternate superblock:
9    e2fsck -b 8193 <device>
10
11Exit status is 8
12