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Date:      Mon, 2 Dec 1996 08:22:16 +0200 (SAT)
From:      Robert Nordier <rnordier@iafrica.com>
To:        taob@io.org (Brian Tao)
Cc:        rnordier@iafrica.com, jkh@time.cdrom.com, hackers@FreeBSD.org
Subject:   Re: A simple way to crash your system.
Message-ID:  <199612020622.IAA02020@eac.iafrica.com>
In-Reply-To: <Pine.BSF.3.95.961201205627.4096C-100000@nap.io.org> from Brian Tao at "Dec 1, 96 09:02:04 pm"

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Brian Tao wrote:

>     Twice I've had ufs corruption with 2.2-ALPHA:
>  
> Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
> /dev/sd0a       98479    15436    75165    17%    /
> /dev/sd0s2e     73855    56996    10951    84%    /usr
> /dev/sd0s2f     19487     5549    12380    31%    /var
> /dev/sd0s2g    297423   226040    47590    83%    /usr/local
> /dev/sd0s2h    285087    67507   194774    26%    /usr/X11R6
> /dev/sd0s1     102166    17800    84366    17%    /c:
> /dev/sd1s1    1052064   604832   447232    57%    /d:
> 
>     Both times I was copying files to /d:, which you will note is a
> DOS filesystem over 1G, on a separate drive.  I think that's about the
> only piece of hard evidence we have in common.  My /usr filesystem
> (and probably others) was hosed.  I've had problems before (prior to
> 2.2-ALPHA) writing to smaller DOS filesystems on the same drive as UFS
> filesystems, but I can't remember the details of those incidents.
> 
>     On another occasion, ld.so complained it couldn't find needed
> libraries, and an 'ls -l' in /usr/lib showed corrupted directory
> entries (strange filenames, huge file sizes, etc.)  I immediately
> rebooted and after the fsck, nothing appeared to be lost.

Thanks for the info.

I believe that John Dyson's vfs changes over this past weekend
should put an end to the ufs corruption problem.  I'm not sure
if or when they, or some other fix, are going into 2.2, though.

-- 
Robert Nordier



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