Re: FAQ updated (was Re: XFS breakage...)

From: Kevin Radloff
Date: Thu Jul 20 2006 - 11:12:56 EST

On 7/20/06, Nathan Scott <nathans@xxxxxxx> wrote:
On Wed, Jul 19, 2006 at 12:21:08PM +0200, Kasper Sandberg wrote:
> On Wed, 2006-07-19 at 08:57 +1000, Nathan Scott wrote:
> > On Wed, Jul 19, 2006 at 12:29:41AM +0200, Torsten Landschoff wrote:
> > >
> > > Jul 17 07:33:53 pulsar kernel: xfs_da_do_buf: bno 16777216
> > > Jul 17 07:33:53 pulsar kernel: dir: inode 54526538
> >
> > I suspect you had some residual directory corruption from using the
> > 2.6.17 XFS (which is known to have a lurking dir2 corruption issue,
> > fixed in the latest -stable point release).

Correction there - no -stable exists with this yet, I guess that'll
be once its out though.

> what action do you suggest i do now?

I've captured the state of this issue here, with options and ways
to correct the problem:

Hope this helps.

I actually tried the xfs_db method to fix my / filesystem (as you had
outlined in,
and while it's quite possible that I screwed it up, after a subsequent
xfs_repair run (which completed successfully and moved lots of stuff
to /lost+found, as I would expect), the XFS code had serious problems
with various parts of my filesystem (like "ls /lost+found", which
would cause lots of errors to be logged, although not a complete fs
shutdown). After another run through xfs_repair resulted in a
filesystem that would no longer even successfully boot.

Unfortunately it was a mostly-full 74GB big-/ partition on my primary
machine (a laptop), so I don't have a dump of it for you and my report
is probably pretty useless. :( But on the bright side, virtually all
of the filesystem was otherwise intact and I was able to get all my
data off before rebuilding my system.

Kevin 'radsaq' Radloff
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