On Thu, Jul 30, 2009 at 11:46:50PM -0700, Crist J. Clark wrote: > I have two file systems in very sad shape that I would like > to retrieve some files from. I've net booted the sick box > and can access the two bad UFSs. One file system, the root > file system, isn't too bad off. However, the usr directory > is messed up. <snip> > Now I can "mount -r /dev/ad0s1a /mnt" to get the above results, > but "fsck /dev/ad0s1a" returns, > > # fsck /dev/ad0s1a > ** /dev/ad0s1a > BAD SUPER BLOCK: VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST > ALTERNATE > > LOOK FOR ALTERNATE SUPERBLOCKS? [yn] y > > 32 is not a file system superblock > SEARCH FOR ALTERNATE SUPER-BLOCK FAILED. YOU MUST USE THE > -b OPTION TO FSCK TO SPECIFY THE LOCATION OF AN ALTERNATE > SUPER-BLOCK TO SUPPLY NEEDED INFORMATION; SEE fsck(8).
Try 'fsck_ffs -b 160 /dev/ad0s1a' assuming you're using a UFS2 filesystem. If that doesn't work, try adding the '-D' flag, but heed the warning in fsck_ffs(8). Only run fsck_ffs when the filesystem is not mounted! If you can, make a copy of the damaged fs and save it to another disk or another machine. Then try to repair the copy. If it fails, you haven't lost your original data. Roland -- R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725)
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