From: Peter Rabbitson <rabbit+list@rabbit.us>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Janos Haar <janos.haar@netcenter.hu>, linux-raid@vger.kernel.org
Subject: Re: Suggestion needed for fixing RAID6
Date: Thu, 22 Apr 2010 18:32:17 +0200 [thread overview]
Message-ID: <4BD07A11.5040300@rabbit.us> (raw)
In-Reply-To: <alpine.DEB.1.10.1004221713420.6768@uplift.swm.pp.se>
Mikael Abrahamsson wrote:
> On Thu, 22 Apr 2010, Janos Haar wrote:
>
> I don't have a good idea that assures your data, unfortunately. One way
> would be to dd the defective drives to working ones, but that will most
> likely cause you to have data loss on the defective sectors (since md
> has no idea that these sectors should be re-created from parity).
>
There was a thread[1] some time ago, where HPA confirmed that the RAID6
data is sufficient to write an algorithm which will be able to determine
which sector is in fact the offending one. There wasn't any interest to
incorporate this into the sync_action/repair function though :(
[1] http://www.mail-archive.com/linux-raid@vger.kernel.org/msg07327.html
next prev parent reply other threads:[~2010-04-22 16:32 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-22 10:09 Suggestion needed for fixing RAID6 Janos Haar
2010-04-22 15:00 ` Mikael Abrahamsson
2010-04-22 15:12 ` Janos Haar
2010-04-22 15:18 ` Mikael Abrahamsson
2010-04-22 16:25 ` Janos Haar
2010-04-22 16:32 ` Peter Rabbitson [this message]
[not found] ` <4BD0AF2D.90207@stud.tu-ilmenau.de>
2010-04-22 20:48 ` Janos Haar
2010-04-23 6:51 ` Luca Berra
2010-04-23 8:47 ` Janos Haar
2010-04-23 12:34 ` MRK
2010-04-24 19:36 ` Janos Haar
2010-04-24 22:47 ` MRK
2010-04-25 10:00 ` Janos Haar
2010-04-26 10:24 ` MRK
2010-04-26 12:52 ` Janos Haar
2010-04-26 16:53 ` MRK
2010-04-26 22:39 ` Janos Haar
2010-04-26 23:06 ` Michael Evans
[not found] ` <7cfd01cae598$419e8d20$0400a8c0@dcccs>
2010-04-27 0:04 ` Michael Evans
2010-04-27 15:50 ` Janos Haar
2010-04-27 23:02 ` MRK
2010-04-28 1:37 ` Neil Brown
2010-04-28 2:02 ` Mikael Abrahamsson
2010-04-28 2:12 ` Neil Brown
2010-04-28 2:30 ` Mikael Abrahamsson
2010-05-03 2:29 ` Neil Brown
2010-04-28 12:57 ` MRK
2010-04-28 13:32 ` Janos Haar
2010-04-28 14:19 ` MRK
2010-04-28 14:51 ` Janos Haar
2010-04-29 7:55 ` Janos Haar
2010-04-29 15:22 ` MRK
2010-04-29 21:07 ` Janos Haar
2010-04-29 23:00 ` MRK
2010-04-30 6:17 ` Janos Haar
2010-04-30 23:54 ` MRK
[not found] ` <4BDB6DB6.5020306@sh iftmail.org>
2010-05-01 9:37 ` Janos Haar
2010-05-01 17:17 ` MRK
2010-05-01 21:44 ` Janos Haar
2010-05-02 23:05 ` MRK
2010-05-03 2:17 ` Neil Brown
2010-05-03 10:04 ` MRK
2010-05-03 10:21 ` MRK
2010-05-03 21:04 ` Neil Brown
2010-05-03 21:02 ` Neil Brown
[not found] ` <4BDE9FB6.80309@shiftmai! l.org>
2010-05-03 10:20 ` Janos Haar
2010-05-05 15:24 ` Suggestion needed for fixing RAID6 [SOLVED] Janos Haar
2010-05-05 19:27 ` MRK
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