Re: Bug in ext3

[Ben Collins]

On Thu, Nov 15, 2001 at 08:09:16PM -0700, Andreas Dilger wrote:
> On Nov 15, 2001  19:55 -0500, Ben Collins wrote:
> > On Thu, Nov 15, 2001 at 05:07:42PM -0700, Andreas Dilger wrote:
> > > What would be interesting to correlate is what inode 48 is (probably a
> > > directory, or you wouldn't have noticed it at all), with the corruption
> > > problems you are having while ext3 is loaded.
> > 
> > 48 /usr/lib/perl5/5.005/File/Copy.pm
> > 
> > Since this file is pretty small, I can only assume that it overwrote
> > some adjacent files. There is some corruption in this file (luckily in
> > the comment area :) starting at the 25th byte, and extending 12 bytes in
> > length. Here's the values from hexedit:
> > 
> > 	00 00 00 01  00 00 00 00  00 00 00 00
> 
> No, this would be the only expected corruption - there are 3 32-bit
> fields that that get written to disk in journal_update_superblock(),
> and these are consistent with that.
> 
> That means the source of the other corruption is unknown.

The "other" corruption only occured while booted with the ext3-enabled
kernel. They haven't appeared under the non-ext3 kernel at all. Even
after it got mounted read-only, performing an fsck, and remounting
read-write, it would reoccur over and over. So this "other" corruption
doesn't even sound like it can be caused by the scenario you described
(which sounds like a one shot problem).

Ben

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