From: Michael Evans <mjevans1983@gmail.com>
To: Shane W <shane-kernel@csy.ca>
Cc: linux-raid@vger.kernel.org
Subject: Re: Problem converting from raid5 to raid6
Date: Sun, 21 Mar 2010 03:28:48 -0700 [thread overview]
Message-ID: <4877c76c1003210328s313155c5u7c6e829d33f38abe@mail.gmail.com> (raw)
In-Reply-To: <20100321030107.GA18586@csy.ca>
On Sat, Mar 20, 2010 at 8:01 PM, Shane W <shane-kernel@csy.ca> wrote:
> Hello all,
>
> I am trying to convert a 5 disk raid5 array to a 6 disk
> raid6 but am having no luck. I first added the 6th disk as
> a spare then
> mdadm --grow /dev/md3 --level 6
> mdadm level of /dev/md3 changed to raid6
> mdadm: /dev/md3: Something wrong - reshape aborted
> mdadm: aborting level change
>
> dmesg doesn't show an error and neither does mdadm beyond
> "something wrong". Is this supported?
>
> mdadm 3.1.1 Linux 2.6.32.8 x86_64.
>
> Thanks,
> Shane
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>
It should be supported, but you probably need to specify a temporary
file ON ANOTHER DEVICE where the 'critical section' can be backed up
to and restored in case the reshape fails. I forget what the exact
syntax is, but man mdadm will inform you.
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next prev parent reply other threads:[~2010-03-21 10:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-21 3:01 Problem converting from raid5 to raid6 Shane W
2010-03-21 10:28 ` Michael Evans [this message]
2010-03-21 12:21 ` Kristleifur Daðason
2010-03-22 6:20 ` Neil Brown
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