From: NeilBrown <neilb@suse.de>
To: kustep <kustep@web.de>
Cc: linux-raid <linux-raid@vger.kernel.org>
Subject: Re: unused space before data offset mismatch
Date: Thu, 21 Nov 2013 14:33:30 +1100 [thread overview]
Message-ID: <20131121143330.326f8d45@notabene.brown> (raw)
In-Reply-To: <528D118D.7090800@web.de>
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On Wed, 20 Nov 2013 20:46:21 +0100 kustep <kustep@web.de> wrote:
> Hello Everyone,
>
> is there an option to specifiy the "Unused Space : before=...."
> Superblock information in mdadm -C ....?
--data-offset=....
or
--data-offset=variable ... /dev/foo:16K /dev/foo2:32K ....
You probably need mdadm 3.3.
NeilBrown
>
> My Raid crashed due to a controller error, but I was able to make the
> new superblock almost identical to the old one (using mdadm -C
> --assume-clean --level=6 --raid-devices=11 --chunk=256K --metadata=1.2
> --bitmap=None --size=195328588 --data-offset=128768 /dev/md0
> /dev/mapper/disk[cdefmbjkh] missing). Looking at mdadm --examine the
> only difference left is:
> old layout: Unused Space : before=257456 sectors, after=197632 sectors
> new layout: Unused Space : before=257448 sectors, after=197632 sectors
>
> Is there an option to change that or anything else I can do to make the
> layouts identical? The assembled raid refuses to mount, and I suspect
> this difference to be the reason.
>
> Thanks in advance
> Stephan
> --
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prev parent reply other threads:[~2013-11-21 3:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-20 19:46 unused space before data offset mismatch kustep
2013-11-21 3:25 ` Phil Turmel
2013-11-21 3:33 ` NeilBrown [this message]
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