From: "H. Peter Anvin" <hpa@zytor.com>
To: Asdo <asdo@shiftmail.org>
Cc: Justin Piszcz <jpiszcz@lucidpixels.com>,
Michael Evans <mjevans1983@gmail.com>,
linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Linux mdadm superblock question.
Date: Sun, 14 Feb 2010 13:18:16 -0800 [thread overview]
Message-ID: <4B786898.8030309@zytor.com> (raw)
In-Reply-To: <4B785C49.7010105@shiftmail.org>
On 02/14/2010 12:25 PM, Asdo wrote:
> I don't understand...
> In a system we have, the root filesystem on a raid-6 which is on second
> (and last) partitions of many disks.
> It always assembled correctly, it never tried to assemble the whole device.
> (on the first partition there is a raid1 with boot)
> So what's the problem exactly with not marking the beginning?
In Fedora 12, for example, Dracut tries to make the distinction between
whole RAID device and a partition device, and utterly fails -- often
resulting in data loss.
With a pointer to the beginning this would have been a trivial thing to
detect.
IMO it would make sense to support autoassemble for 1.0 superblocks, and
making them the default. The purpose would be to get everyone off 0.9.
However, *any* default is better than 1.1.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2010-02-14 21:18 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-11 23:00 Linux mdadm superblock question Justin Piszcz
2010-02-12 1:52 ` Michael Evans
2010-02-12 9:06 ` Robin Hill
2010-02-12 21:53 ` Mr. James W. Laferriere
2010-02-16 0:57 ` Neil Brown
2010-02-16 16:42 ` Bill Davidsen
2010-02-13 19:58 ` H. Peter Anvin
2010-02-13 20:07 ` Justin Piszcz
2010-02-13 20:49 ` david
2010-02-13 21:07 ` Michael Evans
2010-02-13 21:07 ` Michael Evans
2010-02-13 21:29 ` H. Peter Anvin
2010-02-14 20:25 ` Asdo
2010-02-14 21:18 ` H. Peter Anvin [this message]
2010-02-14 21:34 ` Henrique de Moraes Holschuh
2010-02-14 23:20 ` Rudy Zijlstra
2010-02-15 3:40 ` Mr. James W. Laferriere
2010-02-15 7:12 ` Luca Berra
2010-02-16 0:38 ` Neil Brown
2010-02-16 0:27 ` Neil Brown
2010-02-16 1:24 ` H. Peter Anvin
2010-02-16 3:18 ` david
2010-02-16 4:42 ` John Robinson
2010-02-16 4:42 ` John Robinson
2010-02-16 7:02 ` H. Peter Anvin
2010-02-16 8:46 ` Rudy Zijlstra
2010-02-16 17:05 ` Bill Davidsen
2010-02-16 23:30 ` H. Peter Anvin
2010-02-16 10:12 ` Giovanni Tessore
2010-02-17 23:10 ` Neil Brown
2010-02-16 3:40 ` CaT
2010-02-13 6:42 ` martin f krafft
2010-02-13 8:37 ` Giovanni Tessore
2010-02-13 9:26 ` Michael Evans
2010-02-13 9:35 ` Giovanni Tessore
2010-02-13 9:40 ` Michael Evans
2010-02-13 10:06 ` Giovanni Tessore
2010-02-16 0:50 ` Neil Brown
2010-02-16 13:14 ` Justin Piszcz
2010-02-16 20:09 ` mdadm FAQ (was: Linux mdadm superblock question.) martin f krafft
2010-03-06 11:38 ` mdadm FAQ - see http://raid.wiki.kernel.org/ David Greaves
2010-02-17 23:11 ` Linux mdadm superblock question Neil Brown
2010-02-16 17:24 ` Bill Davidsen
-- strict thread matches above, loose matches on Subject: below --
2010-02-14 1:51 Volker Armin Hemmann
2010-02-14 1:51 ` Volker Armin Hemmann
2010-02-14 4:02 ` Michael Evans
2010-02-14 4:02 ` Michael Evans
2010-02-14 7:21 ` david
2010-02-14 8:38 ` Michael Evans
2010-02-14 18:40 ` Volker Armin Hemmann
2010-02-14 18:53 ` John Robinson
2010-02-14 21:16 ` Gabor Gombas
[not found] ` <201002142013.24922.volkerarmin@googlemail.com>
2010-02-16 14:28 ` John Robinson
2010-02-16 14:37 ` Volker Armin Hemmann
2010-02-16 14:46 ` Robin Hill
2010-02-16 17:23 ` John Robinson
2010-02-16 19:38 ` Luca Berra
2010-02-16 17:18 ` Bill Davidsen
2010-02-16 21:06 ` Volker Armin Hemmann
2010-02-16 22:00 ` Nick Bowler
2010-02-16 22:18 ` Volker Armin Hemmann
2010-02-17 14:25 ` Nick Bowler
2010-02-18 9:27 ` Ian Dall
2010-02-17 1:03 ` Mr. James W. Laferriere
2010-02-17 2:01 ` Neil Brown
2010-02-17 2:38 ` Volker Armin Hemmann
2010-02-17 2:38 ` Volker Armin Hemmann
2010-02-17 23:15 ` Neil Brown
2010-02-17 6:34 ` Kyle Moffett
2010-02-17 6:34 ` Kyle Moffett
2010-02-17 9:38 ` Rudy Zijlstra
2010-02-17 13:26 ` Frans Pop
2010-02-17 20:54 ` Gabor Gombas
2010-02-17 21:29 ` Frans Pop
2010-02-18 3:40 ` Goswin von Brederlow
2010-02-18 3:40 ` Goswin von Brederlow
2010-02-17 16:22 ` Kyle Moffett
2010-02-17 16:22 ` Kyle Moffett
2010-02-17 17:41 ` david
2010-02-17 18:10 ` Nick Bowler
2010-02-17 18:27 ` Volker Armin Hemmann
2010-02-17 18:37 ` Nick Bowler
2010-02-17 18:41 ` david
2010-02-17 18:51 ` Nick Bowler
2010-02-17 21:17 ` david
2010-02-17 21:37 ` Nick Bowler
2010-02-17 22:21 ` david
2010-02-17 18:46 ` Volker Armin Hemmann
2010-02-17 22:26 ` H. Peter Anvin
2010-02-18 3:33 ` Goswin von Brederlow
2010-02-18 7:51 ` Luca Berra
2010-02-18 14:12 ` Nick Bowler
2010-02-19 9:04 ` Michael Evans
2010-02-19 9:04 ` Michael Evans
2010-02-14 19:34 ` Henrique de Moraes Holschuh
2010-02-14 20:07 ` Michael Evans
2010-02-14 21:14 ` Henrique de Moraes Holschuh
2010-02-14 20:47 ` Asdo
2010-02-14 21:26 ` Henrique de Moraes Holschuh
2010-02-14 21:28 ` Gabor Gombas
2010-02-15 9:08 ` martin f krafft
2010-02-15 7:51 ` Luca Berra
[not found] <edBWa-K7-9@gated-at.bofh.it>
[not found] ` <edDXX-3XC-7@gated-at.bofh.it>
[not found] ` <edRHA-7bL-13@gated-at.bofh.it>
[not found] ` <eezfA-4N7-11@gated-at.bofh.it>
2010-02-16 21:10 ` Bodo Eggert
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