Re: ReiserFS / 2.4.6 / Data Corruption

From: Hans Reiser (
Date: Wed Jul 18 2001 - 04:42:25 EST

That you had problems on both filesystems makes me suspect the hard drive. May I suggest you run
the badblocks program and see if it finds any?

My other developers may have other suggestions.


Sam Thompson wrote:
> First, please CC all replies to, as I am not on the mailing list.
> The other day a computer of mine lost power and the ext2 fs was severely damaged
> . I decided to reinstall debian using reiserfs to prevent this. I had no problems with installation, (I've done this same install on other computers) but as I started to untar backup tarballs I had made, I started noticing problems with what I believe is the filesystem.
> Tar/gzip will complain about crc errors in files: for example in a certain 40 mb file I can decompress fine on other computers. If I try to uncompress the same file immediately, it will fail at a different point, seemingly at random. Sometimes it works fine. Random debian packages I apt-get have the same problem. Sometimes they won't unpack properly, sometimes they will.
> I tried reinstall gzip several times, but I don't think the problems are limited to compressed files, just very obvious in critical situations like that.
> I can get complex software to run: xfree86 4.1, mozilla, etc, fine, although som
> e files apparently go missing in some programs.
> Just now I got the following error message when deleting a tarball:
> vs-4080: reiserfs_free_block: free_block (0301:672040)[dev:blocknr]: bit already
> cleared
> Next, I took the hard drive to my other, stable computer and ran reiserfsck --rebuild-tree on it, under the hopes that this would fix it. It did appear to fix it, but about 10 minutes later the symptoms came back.
> Here is 'debugreiserfs /dev/hda1' output:
> Super block of format 3.5 found on the 0x3 in block 16
> Block count 4233112
> Blocksize 4096
> Free blocks 3900694
> Busy blocks (skipped 16, bitmaps - 130, journal blocks - 8193
> 1 super blocks, 324078 data blocks
> Root block 8529
> Journal block (first) 18
> Journal dev 0
> Journal orig size 8192
> Filesystem state ERROR
> Tree height 4
> Hash function used to sort names: "tea"
> Objectid map size 62, max 1004
> Version 0
> Here is my relevant hardware:
> Motherboard: Asus A7V KT133 with 686A southbridge (NOT the 686B).
> Harddrive: 30 gig ide maxtor/generic.
> I installed 2.4.6 to try and fix the problem, it didn't seem to help, although I do not clearly remember the difference between 2.2.17-patched and 2.4.6 in terms of the symptoms.
> I tried reinstalling once, but that did not help.
> I'm at a loss as to how to proceed. Any ideas?
> Thank you for your time,
> Sam
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This archive was generated by hypermail 2b29 : Mon Jul 23 2001 - 21:00:10 EST