FK <[EMAIL PROTECTED]> wrote:

> If alternatives are all copies of the master,
> they must have the same contents. I checked and
> found they are equal.
>
> # dd if=/dev/da0s2a skip=160 bs=512 count=16 of=sb1
> 16+0 records in
> 16+0 records out
> 8192 bytes transferred in 0.013373 secs (612571 bytes/sec)
> # dd if=/dev/da0s2a skip=376512 bs=512 count=16 of=sb2
> 16+0 records in
> 16+0 records out
> 8192 bytes transferred in 0.425421 secs (19256 bytes/sec)
...
>
> #diff -s sb1 sb2
> Files sb1 and sb2 are identical
> #diff -s sb1 sb3
> Files sb1 and sb3 are identical

It might be worthwhile to check one of these identical "alternates"
against the "real" superblock.  (AFAIK only the first 512 bytes, or
less, actually matter.)  You might also post a dump of the first 512
bytes and see if anyone notices anything.
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