From: NeilBrown <neilb@suse.de>
To: John Robinson <john.robinson@anonymous.org.uk>
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: Cancel reshape?
Date: Wed, 12 Jan 2011 15:49:05 +1100 [thread overview]
Message-ID: <20110112154905.66f5f37f@notabene.brown> (raw)
In-Reply-To: <4D2D2BD2.7000601@anonymous.org.uk>
On Wed, 12 Jan 2011 04:19:30 +0000 John Robinson
<john.robinson@anonymous.org.uk> wrote:
> I've just started reshaping a RAID-5 to a RAID-6. I had meant to
> increase the number of drives too, so avoiding using the backup file all
> the way through. Unfortunately I forgot to specify that, so it's going
> rather slowly. I said:
>
> mdadm /dev/md1 --grow --level=6 --backup-file=/some/where/else
>
> where md1 had 3 active and 2 spare devices. It's now reshaping itself to
> RAID-6 with 4 active and 1 spare.
>
> What I meant was
>
> mdadm /dev/md1 --grow --level=6 --raid-disks=5 --backup-file=...
>
> Can I cancel reshape that's currently running, and using the backup file
> that's actually on another (RAID-1) array on three of the same drives,
> and running at ~7MB/s, and try again?
>
Sorry, but no. This isn't supported yet.
It would require modification to the kernel to be able to run a reshape in
reverse.
NeilBrown
next prev parent reply other threads:[~2011-01-12 4:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-12 4:19 Cancel reshape? John Robinson
2011-01-12 4:49 ` NeilBrown [this message]
2011-01-12 4:49 ` John Robinson
2011-01-12 5:32 ` NeilBrown
2011-01-12 5:53 ` Speed up reshape? (was Re: Cancel reshape?) John Robinson
2011-01-12 6:02 ` NeilBrown
2011-01-13 13:44 ` John Robinson
2011-01-13 19:14 ` John Robinson
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