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  • What does sudo fdisk -l /dev/sdb show? Commented Mar 2, 2012 at 21:49
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    I can't make myself believe that you were unlucky enough to have all copies of the superblock wiped. So there must be something wrong with the partition table, which in turn is throwing off the logical block offsets in the filesystem causing fsck to not be able to find the alternate superblocks. Commented Mar 3, 2012 at 7:51
  • Didn't you have on this disk LVM? Do you have a external enclosure the same type as previous (same block size, etc.)? Commented Mar 3, 2012 at 8:07
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    @KyleJones Following advice from the author of testdisk, as mentioned above, I tried different offsets using losetup (i * 512 where i is one of 62, 64, 2047 or 2049). Commented Mar 3, 2012 at 11:09
  • @JanMarek No, no LVM unfortunately. The enclosure is one that houses any standard 3.5" disk, but I don't have another, nor a second 1TB disk. Commented Mar 3, 2012 at 11:10