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I have copy the partition to a file with ddrescue, but the first sector is broken and filled with zeros.

I run xfs_repair -f -o force_geometry file.img, after it says "found candidate secondary superblock" and try to save modified primary ones, it exits as:

fatal error - primary superblock write failed!

So, it there anyway to repair it or re-construct the first sector ?

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What happened leading up to this? –  ewwhite Dec 1 '12 at 18:21

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