From: Rich Rauenzahn <rrauenza@gmail.com>
To: Neil Brown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: reshape from raid5 to raid6 failed -- and backup file is gone?
Date: Thu, 22 Apr 2010 15:26:13 -0700 [thread overview]
Message-ID: <l2k657cbef51004221526hcb002ac9pd8e464f50c5b1a70@mail.gmail.com> (raw)
In-Reply-To: <20100423080938.5ef90287@notabene.brown>
>
>
> It is very odd that the backup file disappeared. What is
> /.MEDIA/tmp
> ?? Not a tmpfs filesystem I hope...
No, a persistent filesystem on another disk -- with no autodelete
scripts or anything. Very very weird that it disappeared. I saw it
before I went to bed... was about 50MB if I recall. Unless the fsck
at boot removed it -- but I would imagine you make sure you fsync that
file to disk before you proceed? I think ./.MEDIA is ext4.
> You could hack mdadm to assemble the array even without a backup file.
> Get 'Grow_restart' to always return 0.
>
> Then most of your data should be assessible, but the could be a section in
> the middle which is currupt.
As long as fsck can bring it back to a consistent state, I'm ok with
that. But I would guess some file contents could be silently
corrupt?
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next prev parent reply other threads:[~2010-04-22 22:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-22 18:32 reshape from raid5 to raid6 failed -- and backup file is gone? Rich Rauenzahn
2010-04-22 21:46 ` Rich Rauenzahn
2010-04-22 22:09 ` Neil Brown
2010-04-22 22:26 ` Rich Rauenzahn [this message]
2010-04-22 22:37 ` Neil Brown
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