From: Giovanni Tessore <giotex@texsoft.it>
To: linux-raid@vger.kernel.org
Subject: Re: Linux mdadm superblock question.
Date: Sat, 13 Feb 2010 09:37:00 +0100 [thread overview]
Message-ID: <4B7664AC.4080504@texsoft.it> (raw)
In-Reply-To: <alpine.DEB.2.00.1002111758350.12031@p34.internal.lan>
> I may be converting a host to ext4 and was curious, is 0.90 still the
> only superblock version for mdadm/raid-1 that you can boot from
> without having to create an initrd/etc?
>
> Are there any benefits to using a superblock > 0.90 for a raid-1 boot
> volume < 2TB?
I recently reinstalled my systems, and I had to use superblock 0.9 to be
able to boot ext4 from raid-1 (kernel 2.6.31 - grub2 1.97-beta4).
I didn't go deep with it as I was quite in hurry, so I'm not sure if it
depends by grub2 or by kernel's md autodetection at boot.
I used superblock 1.1 for the others md devices.
The advantage of superblocks >= 1.0 that I prefere is that they persist
the number of recovered read errors; this allow to monitor (at the
moment manually via /sys/block/mdXX/devYY/errors) across system restarts
the health of devices into the array, useful for raid-5 and 2-disks raid-1.
Regards
--
Cordiali saluti.
Yours faithfully.
Giovanni Tessore
next prev parent reply other threads:[~2010-02-13 8:37 UTC|newest]
Thread overview: 93+ 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 21:29 ` H. Peter Anvin
2010-02-14 20:25 ` Asdo
2010-02-14 21:18 ` H. Peter Anvin
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 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 [this message]
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
2010-02-17 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 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 23:15 ` Neil Brown
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
2010-02-17 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
2010-02-14 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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