From: NeilBrown <neilb@suse.de>
To: den Hoog <speedyden@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: looking for advice on raid0+raid5 array recovery with mdadm and sector offset
Date: Mon, 20 Jan 2014 17:16:45 +1100 [thread overview]
Message-ID: <20140120171645.591b17fc@notabene.brown> (raw)
In-Reply-To: <CANgodhDZnogCmXDLz75Hidv=HcYoaoj=1thKTqt8htP8gx3CSw@mail.gmail.com>
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On Thu, 16 Jan 2014 22:03:00 +0100 den Hoog <speedyden@gmail.com> wrote:
> Hi Neil
>
> can you try to make 'missing' working for imsm?
>
> probably not on the short list of things to do, but if you are willing
> to help me out, I'll appreciate it much!
Hi Dennis,
it seems that "missing" already works with IMSM. I thought I remembered that
it didn't, but I was wrong.
So you should be able to create the raid0 using the first parts of the
devices, then create the RAID5.
When creating the RAID5, list the devices that should make up the RAID5 in
the correct order.
So something like:
mdadm -C /dev/md/imsm -e imsm -n 4 /dev/sd[bcde]
mdadm -C /dev/md0 -l0 -n4 -c 128k -z 512G /dev/md/imsm
mdadm -C /dev/md1 -l5 -n4 -c 128k missing /dev/sdc /dev/sdd /dev/sde
Then /dev/md1 should be your RAID5 array.
You should double-check the above command to make sure you agree with ever
part, and ask if there is anything that doesn't seem right.
NeilBrown
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next prev parent reply other threads:[~2014-01-20 6:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-02 19:45 looking for advice on raid0+raid5 array recovery with mdadm and sector offset den Hoog
2014-01-06 1:41 ` NeilBrown
2014-01-06 6:53 ` den Hoog
2014-01-07 21:43 ` den Hoog
2014-01-16 21:03 ` den Hoog
2014-01-20 6:16 ` NeilBrown [this message]
2014-01-20 21:43 ` den Hoog
2014-01-20 22:11 ` NeilBrown
2014-01-20 22:51 ` NeilBrown
2014-01-24 23:13 ` den Hoog
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