From: Brad Campbell <brad@wasp.net.au>
To: "Peter T. Breuer" <ptb@lab.it.uc3m.es>
Cc: linux-raid@vger.kernel.org
Subject: Re: ext3 journal on software raid (was Re: PROBLEM: Kernel 2.6.10 crashing repeatedly and hard)
Date: Wed, 05 Jan 2005 02:02:39 +0400 [thread overview]
Message-ID: <41DB127F.3090303@wasp.net.au> (raw)
In-Reply-To: <j6dra2-9vs.ln1@news.it.uc3m.es>
Peter T. Breuer wrote:
> maarten <maarten@ultratux.net> wrote:
>>You can't flip a bit
>>unnoticed.
>
>
> Not by me, but then I run md5sum every day. Of course, there is a
> question if the bit changed on disk, in ram, or in the cpu's fevered
> miscalculations. I've seen all of those. One can tell which after a bit
> more detective work.
>
I'm wondering how difficult it may be for you to extend your md5sum script to diff the pair of files
and actually determine the extent of the corruption. bit/byte/word/.../sector/.../stripe wise?
I have 2 RAID-5 arrays here. a 3x233GiB and a 10x233GiB and I when I install new data on the drives
I add the md5sum of that data to an existing database stored on another machine. This gets compared
against the data on the arrays weekly and I have yet to see a silent corruption in 18 months.
I do occasionally remove/re-add a drive to each array, which causes a full resync of the array and
should show up any parity inconsistency by a faulty fsck or md5sum. It has not as yet.
Honestly, in my years running Linux and multiple drive arrays I have never experienced errors such
as you are getting.
Oh.. and both my arrays are running ext3 with an internal journal (as are all my other partitions on
all my other machines).
Perhaps I'm lucky?
Brad
next prev parent reply other threads:[~2005-01-04 22:02 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200501030916.j039Gqe23568@inv.it.uc3m.es>
2005-01-03 10:17 ` ext3 journal on software raid (was Re: PROBLEM: Kernel 2.6.10 crashing repeatedly and hard) Guy
2005-01-03 11:31 ` Peter T. Breuer
2005-01-03 17:34 ` Guy
2005-01-03 19:20 ` ext3 Gordon Henderson
2005-01-03 19:47 ` ext3 Morten Sylvest Olsen
2005-01-03 20:05 ` ext3 Gordon Henderson
2005-01-03 17:46 ` ext3 journal on software raid (was Re: PROBLEM: Kernel 2.6.10 crashing repeatedly and hard) maarten
2005-01-03 19:52 ` maarten
2005-01-03 20:41 ` Peter T. Breuer
2005-01-03 23:19 ` Peter T. Breuer
2005-01-03 23:46 ` Neil Brown
2005-01-04 0:28 ` Peter T. Breuer
2005-01-04 1:18 ` Alvin Oga
2005-01-04 4:29 ` Neil Brown
2005-01-04 8:43 ` Peter T. Breuer
2005-01-04 2:07 ` Neil Brown
2005-01-04 2:16 ` Ewan Grantham
2005-01-04 2:22 ` Neil Brown
2005-01-04 2:41 ` Andy Smith
2005-01-04 3:42 ` Neil Brown
2005-01-04 9:50 ` Peter T. Breuer
2005-01-04 14:15 ` David Greaves
2005-01-04 15:20 ` Peter T. Breuer
2005-01-04 16:42 ` Guy
2005-01-04 17:46 ` Peter T. Breuer
2005-01-04 9:30 ` Maarten
2005-01-04 10:18 ` Peter T. Breuer
2005-01-04 13:36 ` Maarten
2005-01-04 14:13 ` Peter T. Breuer
2005-01-04 19:22 ` maarten
2005-01-04 20:05 ` Peter T. Breuer
2005-01-04 21:38 ` Guy
2005-01-04 23:53 ` Peter T. Breuer
2005-01-05 0:58 ` Mikael Abrahamsson
2005-01-04 21:48 ` maarten
2005-01-04 23:14 ` Peter T. Breuer
2005-01-05 1:53 ` maarten
2005-01-04 9:46 ` Peter T. Breuer
2005-01-04 19:02 ` maarten
2005-01-04 19:12 ` David Greaves
2005-01-04 21:08 ` Peter T. Breuer
2005-01-04 22:02 ` Brad Campbell [this message]
2005-01-04 23:20 ` Peter T. Breuer
2005-01-05 5:44 ` Brad Campbell
2005-01-05 9:00 ` Peter T. Breuer
2005-01-05 9:14 ` Brad Campbell
2005-01-05 9:28 ` Peter T. Breuer
2005-01-05 9:43 ` Brad Campbell
2005-01-05 15:09 ` Guy
2005-01-05 15:52 ` maarten
2005-01-05 10:04 ` Andy Smith
2005-01-04 22:21 ` Neil Brown
2005-01-05 0:08 ` Peter T. Breuer
2005-01-04 22:29 ` Neil Brown
2005-01-05 0:19 ` Peter T. Breuer
2005-01-05 1:19 ` Jure Pe_ar
2005-01-05 2:29 ` Peter T. Breuer
2005-01-05 0:38 ` maarten
2005-01-04 9:40 ` Peter T. Breuer
2005-01-04 11:57 ` Which drive gets read in case of inconsistency? [was: ext3 journal on software raid etc] Michael Tokarev
2005-01-04 12:40 ` Morten Sylvest Olsen
2005-01-04 12:44 ` Peter T. Breuer
2005-01-04 14:22 ` Maarten
2005-01-04 14:56 ` Peter T. Breuer
2005-01-04 14:03 ` ext3 journal on software raid (was Re: PROBLEM: Kernel 2.6.10 crashing repeatedly and hard) David Greaves
2005-01-04 14:07 ` Peter T. Breuer
2005-01-04 14:43 ` David Greaves
2005-01-04 15:12 ` Peter T. Breuer
2005-01-04 16:54 ` David Greaves
2005-01-04 17:42 ` Peter T. Breuer
2005-01-04 19:12 ` David Greaves
2005-01-04 0:45 ` maarten
2005-01-04 10:14 ` Peter T. Breuer
2005-01-04 13:24 ` Maarten
2005-01-04 14:05 ` Peter T. Breuer
2005-01-04 15:31 ` Maarten
2005-01-04 16:21 ` Peter T. Breuer
2005-01-04 20:55 ` maarten
2005-01-04 21:11 ` Peter T. Breuer
2005-01-04 21:38 ` Peter T. Breuer
2005-01-04 23:29 ` Guy
2005-01-04 19:57 ` Mikael Abrahamsson
2005-01-04 21:05 ` maarten
2005-01-04 21:26 ` Alvin Oga
2005-01-04 21:46 ` Guy
2005-01-03 20:22 ` Peter T. Breuer
2005-01-03 23:05 ` Guy
2005-01-04 0:08 ` maarten
2005-01-04 8:57 ` I'm glad I don't live in Spain (was Re: ext3 journal on software raid) David L. Smith-Uchida
2005-01-03 21:36 ` ext3 journal on software raid (was Re: PROBLEM: Kernel 2.6.10 crashing repeatedly and hard) Guy
2005-01-04 0:15 ` maarten
2005-01-04 11:21 ` Michael Tokarev
2005-01-03 9:30 Peter T. Breuer
-- strict thread matches above, loose matches on Subject: below --
2004-12-30 0:31 PROBLEM: Kernel 2.6.10 crashing repeatedly and hard Georg C. F. Greve
2004-12-30 16:23 ` Georg C. F. Greve
2004-12-30 17:39 ` Peter T. Breuer
2004-12-30 19:50 ` Michael Tokarev
2004-12-30 21:39 ` Peter T. Breuer
2005-01-02 19:42 ` ext3 journal on software raid (was Re: PROBLEM: Kernel 2.6.10 crashing repeatedly and hard) Andy Smith
2005-01-02 20:18 ` Peter T. Breuer
2005-01-03 0:30 ` Andy Smith
2005-01-03 6:41 ` Neil Brown
2005-01-03 8:37 ` Peter T. Breuer
2005-01-03 8:03 ` Peter T. Breuer
2005-01-03 8:58 ` Guy
2005-01-03 12:11 ` Michael Tokarev
2005-01-03 14:23 ` Peter T. Breuer
2005-01-03 18:30 ` maarten
2005-01-03 21:36 ` Michael Tokarev
2005-01-05 9:56 ` Andy Smith
2005-01-05 10:44 ` Alvin Oga
2005-01-05 10:56 ` Brad Campbell
2005-01-05 11:39 ` Alvin Oga
2005-01-05 12:02 ` Brad Campbell
2005-01-05 13:23 ` Alvin Oga
2005-01-05 13:33 ` Brad Campbell
2005-01-05 14:12 ` Erik Mouw
2005-01-05 14:37 ` Michael Tokarev
2005-01-05 17:11 ` Erik Mouw
2005-01-06 5:41 ` Brad Campbell
2005-01-05 15:17 ` Guy
2005-01-05 15:33 ` Alvin Oga
2005-01-05 16:22 ` Michael Tokarev
2005-01-05 17:23 ` Peter T. Breuer
2005-01-05 16:23 ` Andy Smith
2005-01-05 16:30 ` Andy Smith
2005-01-05 17:07 ` Guy
2005-01-05 17:21 ` Alvin Oga
2005-01-05 17:32 ` Guy
2005-01-05 18:37 ` Alvin Oga
2005-01-05 17:26 ` David Greaves
2005-01-05 18:16 ` Peter T. Breuer
2005-01-05 18:28 ` Guy
2005-01-05 18:26 ` Guy
2005-01-05 15:48 ` Peter T. Breuer
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