From: NeilBrown <neilb@suse.de>
To: Roman Mamedov <rm@romanrm.ru>
Cc: linux-raid@vger.kernel.org
Subject: Re: [md PATCH 01/10] md: allow a reshape operation to be reversed.
Date: Tue, 2 Oct 2012 12:41:03 +1000 [thread overview]
Message-ID: <20121002124103.6d66e3f2@notabene.brown> (raw)
In-Reply-To: <20121001161554.2445f3e5@natsu>
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On Mon, 1 Oct 2012 16:15:54 +0600 Roman Mamedov <rm@romanrm.ru> wrote:
> On Tue, 03 Apr 2012 15:53:01 +1000
> NeilBrown <neilb@suse.de> wrote:
>
> > To reverse a partial reshape which changes the number of devices
> > you can stop the array and re-assemble with the raid-disks numbers
> > reversed and it will undo.
>
> Unfortunately this does not seem to work:
>
> # mdadm --assemble --raid-disks=5 --backup-file=/mnt/scratch/backup-file /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sde1 /dev/sdd1 /dev/sdf1
> mdadm:option --raid-disks not valid in assemble mode
>
No, mdadm doesn't support this yet. The patch you identified is part of
preparing the way for this functionality, but it isn't ready yet.
For now, you'll just need to let the reshape complete.
NeilBrown
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next prev parent reply other threads:[~2012-10-02 2:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-03 5:53 [md PATCH 00/10] md patches for 3.5: RAID10 reshape NeilBrown
2012-04-03 5:53 ` [md PATCH 02/10] md: add possibility to change data-offset for devices NeilBrown
2012-04-03 5:53 ` [md PATCH 03/10] md/raid5: Use correct data_offset for all IO NeilBrown
2012-04-03 5:53 ` [md PATCH 04/10] md/raid5: allow for change in data_offset while managing a reshape NeilBrown
2012-04-03 5:53 ` [md PATCH 01/10] md: allow a reshape operation to be reversed NeilBrown
2012-10-01 9:11 ` Roman Mamedov
2012-10-01 10:15 ` Roman Mamedov
2012-10-02 2:41 ` NeilBrown [this message]
2012-04-03 5:53 ` [md PATCH 06/10] md: teach sync_page_io about new_data_offset NeilBrown
2012-04-03 5:53 ` [md PATCH 05/10] md/raid10: collect some geometry fields into a dedicated structure NeilBrown
2012-04-03 5:53 ` [md PATCH 10/10] md/raid10: add reshape support NeilBrown
2012-04-03 5:53 ` [md PATCH 07/10] md: use resync_max_sectors for reshape as well as resync NeilBrown
2012-04-03 5:53 ` [md PATCH 08/10] md/raid10: Introduce 'prev' geometry to support reshape NeilBrown
2012-04-03 5:53 ` [md PATCH 09/10] md/raid10: split out interpretation of layout to separate function NeilBrown
2014-03-01 5:08 ` [md PATCH 00/10] md patches for 3.5: RAID10 reshape Phillip Susi
2014-03-01 7:03 ` NeilBrown
2014-03-01 19:33 ` Phillip Susi
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