From: Tomasz Torcz <tomek@pipebreaker.pl>
To: linux-btrfs@vger.kernel.org
Subject: Re: btrfs csum failed on git .pack file
Date: Thu, 17 Sep 2009 19:50:01 +0200 [thread overview]
Message-ID: <20090917175001.GA23973@mother.pipebreaker.pl> (raw)
In-Reply-To: <20090917171006.GA1935@phenom2.trippelsdorf.de>
On Thu, Sep 17, 2009 at 07:10:06PM +0200, Markus Trippelsdorf wrote:
> > > 06CD DFC0: 0D 86 2B B2 57 A4 5A CD 78 4B 08 94 C0 65 17 3A
> > > 06CD DFC0: 0D 86 2B B2 57 A4 5A CD 78 0B 08 94 C0 65 17 3A
> >
> > 4B = 01001011
> > 0B = 00001011
> >
> > And so on.
> >
> > It looks like a few bits are getting flipped at the same byte offset.
> > One can imagine software bugs that would do this, certainly, but upset
> > hardware seems awfully likely too.
>
> I'm afraid you're right. I did some further tests and now I'm pretty
> sure that a bad RAM module was the root cause of it all...
> Oh well.
On the other hand, that what's so great in checksumming filesystems.
You found bad module thanks to btrfs, otherwise you wouldn't suspect
anything wrong. If you have had raid-1 for data, this corruption would
have been fixed by btrfs.
--
Tomasz Torcz 72->| 80->|
xmpp: zdzichubg@chrome.pl 72->| 80->|
prev parent reply other threads:[~2009-09-17 17:50 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-07 20:35 btrfs csum failed on git .pack file Markus Trippelsdorf
2009-09-08 20:00 ` Jens Axboe
2009-09-08 20:22 ` Markus Trippelsdorf
2009-09-08 20:32 ` Jens Axboe
2009-09-08 20:55 ` Tomasz Torcz
2009-09-09 6:55 ` Markus Trippelsdorf
2009-09-09 7:01 ` Jens Axboe
2009-09-09 7:23 ` Markus Trippelsdorf
2009-09-09 7:29 ` Jens Axboe
2009-09-09 8:18 ` Daniel J Blueman
2009-09-09 8:26 ` Jens Axboe
2009-09-09 8:37 ` Daniel J Blueman
2009-09-09 11:19 ` Chris Mason
2009-09-09 21:01 ` Oliver Mattos
2009-09-10 10:49 ` Bryan Østergaard
2009-09-08 21:53 ` Tracy Reed
2009-09-09 7:28 ` Gregory Maxwell
2009-09-17 5:05 ` Markus Trippelsdorf
2009-09-17 6:44 ` Jens Axboe
2009-09-17 9:04 ` Markus Trippelsdorf
2009-09-17 9:05 ` Jens Axboe
2009-09-17 12:15 ` Markus Trippelsdorf
2009-09-17 13:58 ` Markus Trippelsdorf
2009-09-17 17:00 ` Zach Brown
2009-09-17 17:10 ` Markus Trippelsdorf
2009-09-17 17:50 ` Tomasz Torcz [this message]
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