[Fwd: [vox-tech] corrupted ext3 filesystem]

[Peter Jay Salzman]

hi jonathan,

i think people didn't respond because nobody really had an answer.  i
sure don't.  some ideas to be tossed around:

* have you googled for the problem of umount errors during shutdown?

* does anyone know if there are any issues with winxp causing problems
   for non-MS filesystems?

* perhaps the first thing to try would be to experiment mounting and
   umounting partitions on your own.  start by fscking all your
   partitions so you know you're starting with a clean slate.  start to
   experiment with umounting things like /home, /var (in single user
   mode), remounting root as read only.  stuff like that.   see if you
   can REPRODUCE the error.  if you can reproduce the error under
   controlled circumstances, that's a big step in solving the problem.

* you say that you occaisionally get umount errors but they fly across
   the screen too quickly to be wrote down.  personally, i've found that
   when that happens to me, a nice digital camera (turn the flash off)
   will help capture the messages.

pete

begin Jonathan Stickel <jjstickel@netscape.net> 
> 
> 
> -------- Original Message --------
> Subject: [vox-tech] corrupted ext3 filesystem
> Date: Tue, 11 Feb 2003 16:03:32 -0800
> From: Jonathan Stickel <jjstickel@netscape.net>
> Reply-To: vox-tech@lists.lugod.org
> To: vox-tech <vox-tech@lists.lugod.org>
> 
> Thanks, Pete, for correctly guessing that my xmms/rpm problems were due
> to a corrupted filesystem.  I have managed to fix the filesystem with
> fsck (many, many errors) and reload the two affected programs with rpm.
> 
> I would like to solicit some help and comments about what may have
> caused my system to become corrupt and how to prevent this from
> happening in the future.  Please know that I am relatively new to Linux.
> 
> A while back I posted a message asking about some occasional umount
> errors during shutdown.  My post must have seemed uninteresting because
> no one responded, which was fine because it didn't seem to be causing
> any problems.  However, I now wonder if this is related my filesystem
> corrupting on me.  Every time I shutdown or reboot, I get this message:
> 
> kjournald[150] exited with preempt count 1
> 
> _Occasionaly_  I get half a dozen umount and umount2 errors that fly by
> so quickly I can't write them down.  As I posted before, I am not able
> to find a system log file with these shutdown messages either.  During
> bootup of Linux after these umount errors, it lets me know that there
> was a problem and does a filesystem check.  This was actually how I was
> able to run fsck today to fix the problem.
> 
> Does anyone know if these types of messages are common?  Could they be
> related to a filesystem corrupting?
> 
> I should mention that my machine is a laptop which does get jostled
> quite a bit during my bike commute.  In the old days of DOS, I remember
> "parking" hardrives on shutdown to prevent damage.  Is this at all
> related to unmounting filesystems on shutdown?  I am definitely showing
> my ignorance here.
> 
> _______________________________________________
> 
> I meant to also add these points.  Pete suggested I look in my system 
> logs for "diskseek" errors.  The only thing I thought was close was this 
> error:
> 
> Feb 11 09:07:24 chms-hp4 kernel: isofs_read_super: bread failed, 
> dev=0b:00, iso_blknum=16, block=16
> 
> This error did occur at about the time of my first noticeable problem.
> 
> Also, my system is dual boot WinXP pro, and RH8, with a custom kernal. 
> The mounted partitions are:
> 
> Filesystem    Type    Size  Used Avail Use% Mounted on
> /dev/hda3     ext3    6.2G  3.2G  2.7G  54% /
> /dev/hda2     ext3     99M   13M   81M  14% /boot
> none         tmpfs    235M     0  235M   0% /dev/shm
> /dev/hda5     vfat    5.8G  2.3G  3.5G  40% /Documents
> 
> with /dev/hda1 being WinXP, which I normally do not mount.
> 
> Thanks in advance for reading this long message and for any comments you 
> have.
> 
> Jonathan
> 
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-- 
First they ignore you, then they laugh at you, then they fight you,
then you win. -- Gandhi, being prophetic about Linux.

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