[Fwd: Re: Data being corrupted on reiserfs 3.6]

[Fwd: Re: Data being corrupted on reiserfs 3.6]

[Stéphane Jourdois]

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Same excuses for forgetting CC: on first post.

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From: "Stéphane Jourdois" <kwisatz@rubis.org>
To: Michael Barnwell <xterminate@xterminate.me.uk>
Subject: Re: Data being corrupted on reiserfs 3.6
Date: Sun, 15 Jan 2006 11:05:56 +0100
Message-ID: <43CA1E84.3060807@rubis.org>

Michael Barnwell a écrit :

> Is it just a problem with reisferfs and RAID 5 do you know? I can't
> really afford a hardware RAID 5 controller, so using ext3 maybe more
> sensible for me.

It seems to occur only with reiserfs over raid5. Other filesystems seems
to be less vulnerable.
It must be a raid5 issue, because I never had a problem using reiserfs
on a real disk.

I saw several reports like yours, I reported this myself one year ago,
and I don't know if raid guys
investigated this issue.

You could try to reproduce the problem without reiserfs, using dd on the
raid5 device without any filesystem. This for sure would tie the problem
with raid5 and could help debugging this problem. I know that reiserfs
tends to write very fast, and observed this issue only when copying
large files.

Sorry for the bad news.

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[Fwd: Re: Data being corrupted on reiserfs 3.6]

[Stéphane Jourdois]

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Sorry, I forgot to Cc: the list on reply.
2nd message follow.
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From: "Stéphane Jourdois" <kwisatz@rubis.org>
To: Michael Barnwell <xterminate@xterminate.me.uk>
Subject: Re: Data being corrupted on reiserfs 3.6
Date: Sun, 15 Jan 2006 00:57:35 +0100
Message-ID: <43C98FEF.2090100@rubis.org>

Hi,

Michael Barnwell a écrit :

> I'm experiencing data corruption when creating or copy data to my
> reiserfs 3.6 partition mounted under /home. The following extract
> gives a pretty clear indication that it's getting corrupted somewhere.
> [..]
> I'm running Debian Sarge on an Athlon XP 2200+, /dev/md2 is made up of
> four 400GB SATA hard disks on a Silicon Image 3114 controller in RAID
> 5. Dmesg is showing no errors what so ever, the RAID array has been
> stable since I installed it a couple of weeks ago and the drive was
> formatted with mkfs.reiserfs with no special options.

I experienced similar corruptions on reiserfs over software RAID5,
amd64. It has been stable for several weeks before beginning to corrupt
data, and oopsing because of reiserfs corruptions.
(fsck.reiserfs --rebuild-tree helped to power up the box for less than a
day before next oops).
I since have buyed a controller that does hardware raid5.

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 ///  Stephane Jourdois     /"\  ASCII RIBBON CAMPAIGN \\\
(((    Consultant securite  \ /    AGAINST HTML MAIL    )))
 \\\   24 rue Cauchy         X                         ///
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