From: bugme-daemon@bugzilla.kernel.org
Subject: [Bug 12821] filesystem corrupts on heavy I/O
Date: Tue, 10 Mar 2009 03:03:07 -0700 (PDT)
Message-ID: <20090310100307.B4759108043@picon.linux-foundation.org>
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------- Comment #13 from ddi@dubex.dk 2009-03-10 03:03 -------
dd'd the problematic file to /dev/null just now. Yielded no complaints in the
syslog about unexpected eh_depths. Maybe the reboot+fsck had some effect.
In retrospect, I should probably have found a network mount (since write speed
suffered badly when the problem hit) and done the e2image before reboot/fsck,
so we'd have a pristine image. A quick HOWTO on the subject with best
practices for ad-hoc network mounting (using random kernel/distro) plus a copy
of relevant parts of the e2image man page would be helpful to others in the
same situation.
comment #8:
Priceless information. Thanks!
comment #11:
Transcripts are great; I'm learning a bit of ext4 debugging as we go along. I
take it that there's no on-disk problem (now), then. Confirmed by running fsck
1.41.4 as requested in comment #9:
e2fsck 1.41.4 (27-Jan-2009)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
7648 inodes used (0.01%)
2994 non-contiguous files (39.1%)
17 non-contiguous directories (0.2%)
# of inodes with ind/dind/tind blocks: 0/0/0
Extent depth histogram: 3710/3891/35/2
273816895 blocks used (75.92%)
0 bad blocks
7 large files
7593 regular files
46 directories
0 character device files
0 block device files
0 fifos
0 links
0 symbolic links (0 fast symbolic links)
0 sockets
--------
7639 files
comment #10:
Thanks! Used above. There's some Ubuntu-related issues, I'll try my luck with
Launchpad for those *cross fingers*.
comment #11 (again):
Will try the patch ASAP, meaning once I've figured out how to best "inject" it
into the local Ubuntu eco-system without disrupting the package management,
updates etc.
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