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Cc: questions@freebsd.org
Subject: Re: disk recovery problem II
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> huff@>> newfs /dev/da3a
> /dev/da3a: 78167.2MB (160086512 sectors) block size 16384, fragment size 2048
>         using 426 cylinder groups of 183.77MB, 11761 blks, 23552 inodes.
> super-block backups (for fsck -b #) at:
>  160, 376512, 752864, 1129216, 1505568, 1881920, 2258272, 2634624, 3010976,
...
>  159949760
> cg 0: bad magic number

Bad drive, perhaps?  What do sysutils/smartmontools say?