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    SubjectRe: Bug in ext3
    On Thu, Nov 15, 2001 at 05:06:28PM -0500, Ben Collins wrote:
    > On Thu, Nov 15, 2001 at 02:58:03PM -0700, Andreas Dilger wrote:
    > > On Nov 15, 2001 16:02 -0500, Ben Collins wrote:
    > > > On Thu, Nov 15, 2001 at 12:48:26PM -0800, Andrew Morton wrote:
    > > > > ext3 thinks that the filesystem's superblock has the
    > > > > EXT3_FEATURE_COMPAT_HAS_JOURNAL bit set in the s_feature_compat
    > > > > field of the on-disk superblock.
    > > > >
    > > > > It's probable that that bit _is_ set. ext2 will never notice it.
    > > > >
    > > > > Please: the dumpe2fs output?
    > > >
    > > > Seems it does have the field set. I guess the bug is then that if there
    > > > is no journal, then it shoudl fail to mount it, so ext2 will take over.
    > > > Is there any reason to mount a partition as ext3 if there is no journal
    > > > to be found?
    > >
    > > It _does_ fail to mount the filesystem as ext3, and the ext2 code properly
    > > mounts it. You can see this because the error message you got (in your
    > > previous posting said "EXT2-fs: ..." so the error came from ext2.
    > >
    > > Please run e2fsck (1.25) to clear this up. It may be that you have other
    > > corruption in your filesystem. If you are sure you _never_ tried ext3
    > > on this filesystem before, yet the has_journal bit is set, this could
    > > be an indication of memory or cable problems.
    >
    > Uh, something corrupted it. Believe me, there is no other corruption.
    > I've reverted to a non-ext3 kernel, and after a day of serious IO, no
    > problems have shown. So something is wrong, and it isn't my filesystem
    > (the erroneous flag needs to be cleared, yes, but the fact remains that
    > there is a problem in this case).

    Yes, true.

    Can you try again with a journal in this FS with ext3?

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