On Mon, 1 Oct 2012 16:15:54 +0600 Roman Mamedov <rm@xxxxxxxxxx> wrote: > On Tue, 03 Apr 2012 15:53:01 +1000 > NeilBrown <neilb@xxxxxxx> 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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