[BUGA] looking for a better fsck

[Phil Kernick]

I have a root disk that for reasons best known to itself got somewhat
corrupted.  UFS2 on FreeBSD 5.5beta4.

If I reboot and launch fixit from the install CD and...

# fsck_ffs -y /dev/ad0s1a

It comes up clean.  (I know, -y is scary and dangerous :-)

But after doing some intensive disk activity, I get things like this:
May  7 11:19:52 kernel: bad block -1, ino 1979583
May  7 11:19:52 kernel: pid 952 (rm), uid 0 inumber 1979583 on /: bad block

Somehow inode 1979583 ends up a with a bad block in it (probably from the
corruption that occurred a while back) and fsck didn't find it.

I'm looking for a better fsck that will actually check the blocks in all the
inodes.

According to fsck_ffs(8) it checks for:
     2.   Blocks claimed by an inode outside the range of the file system.

But empirical evidence suggests that this is unlikely, inaccurate or incomplete.


Thanks,
Phil.