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Re: file corruption

To: linux-xfs@xxxxxxxxxxx
Subject: Re: file corruption
From: Ethan Benson <erbenson@xxxxxxxxxx>
Date: Thu, 1 Apr 2004 22:13:49 -0900
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On Thu, Apr 01, 2004 at 08:48:27PM -0800, Chris Wedgwood wrote:
> On Thu, Apr 01, 2004 at 07:39:20PM -0900, Ethan Benson wrote:
> 
> > I have seen this a few times as well, except the binary crap is
> > usually PREpended rather then appended to the file, also the end of
> > the file is usually cut off, as if the start and end markers were
> > equally offset backwards.  (the start of the file moved back 5 or 10
> > bytes, and the end of the file moved back 5 or 10 bytes, thus causing
> > truncation and random crud being prepended).
> 
> How much data are we talking about here?  For > blocksize this seems
> impssible.
no more then 5 - 15 bytes or so.

its definitly quite strange, i couldn't really make any guess as to
what would cause it.  but its definitly possible since ive seen it
happen several times on multiple files, each file affected in a
consistent way.

what i find most peculiar is how it consistently affected
/var/log/foo.gz.{1,2} but not {3,4} (or maybe it was {2,3} and {3,4} i
don't recall now).

however no other .gz file anywhere else in the filesystem was
corrupted in this manner.

-- 
Ethan Benson
http://www.alaska.net/~erbenson/

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