On Mon, 21 Dec 2009 09:35:28 +0000 Robin Hill <robin@xxxxxxxxxxxxxxx> wrote: > On Mon Dec 21, 2009 at 03:41:33AM +0000, Kristleifur Daðason wrote: > > > Hi all, > > > > I wish to convert my 3-drive RAID-5 array to a 6-drive RAID-6. I'm on > > Linux 2.6.32.2 and have mdadm version 3.1.1 with the 32-bit-array-size > > patch from here: http://osdir.com/ml/linux-raid/2009-11/msg00534.html > > > > I have three live drives and three spares added to the array. When I > > initialize the command, mdadm does the initial checks and aborts with > > a "cannot set device shape" without doing anything to the array. > > > > $ mdadm --grow /dev/md_d1 --level=6 --raid-devices=6 > > --backup-file=/root/backup.md1_to_r6 > > mdadm: metadata format 1.10 unknown, ignored. > > mdadm: metadata format 1.10 unknown, ignored. > > mdadm level of /dev/md_d1 changed to raid6 > > mdadm: Need to backup 1024K of critical section.. > > mdadm: Cannot set device shape for /dev/md_d1 > > mdadm: aborting level change > > > I don't think you can grow and reshape simultaneously. I think you'll > need to do this as two operations - either grow to a 5 disk RAID5 then > reshape to a 6 disk RAID6, or reshape to a 4 disk RAID6 then grow. > Why do you think that? If there is something in the documentation that suggests that, please point it out and I'll change it. You should be able to change level, layout, number of devices, chunksize all at the same time. NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
