Messages in this thread | | | Date | Mon, 21 Feb 2005 12:37:53 +0100 | From | Andreas Steinmetz <> | Subject | Re: Odd data corruption problem with LVM/ReiserFS |
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Alex Adriaanse wrote: > As far as I can tell all the directories are still intact, but there > was a good number of files that had been corrupted. Those files > looked like they had some chunks removed, and some had a bunch of NUL > characters (in blocks of 4096 characters). Some files even had chunks > of other files inside of them!
I can second that. I had the same experience this weekend on a md/dm/reiserfs setup. The funny thing is that e.g. find reports I/O errors but if you then run tar on the tree you eventually get the correct data from tar. Then run find again and you'll again get I/O errors.
> I did a reiserfsck (3.6.19) on /var, which did not report any problems.
You need to run 'reiserfsck --rebuild-tree' and see what happens :-(
> Anyway, what do you guys think could be the problem? Could it be that > the LVM / Device Mapper snapshot feature is solely responsible for > this corruption? (I'm sure there's a reason it's marked > Experimental).
I don't think so - I changed from reiserfs to ext3 without changing the underlying dm/raid5 and this seems to work properly.
I can furthermore state that reiserfs without dm/md does work correctly as I use reiserfs on a ieee1394 backup disk (that saved me from terrible trouble).
Currently I can only warn to not use reiserfs with dm/md on 2.6. -- Andreas Steinmetz SPAMmers use robotrap@domdv.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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