Charles Sprickman wrote:

... there seem to be a ton of superblock backups. How do I find out where they are and compare them?

This is an FAQ, and probably in the handbook somewhere (google for "alternate superblock"):

  * According to "man fsck_ffs", block 32 is usually
    an alternate superblock.

  * You can also use newfs -N to find out where
    the superblocks are probably located and
    fsck_ffs -b to recheck the drive using
    one of the alternates instead of the trashed
    primary.

  * 40G IDE drives are cheap and plenty big enough
    to give you a sandbox for trying to recover
    your 26G filesystem image.

Someone else mentioned "fsdb."  I've never used
it myself, but it looks like it might be useful to you.

Tim

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