On Tue, 25 Feb 2014 22:05:32 -0800 Charles Polisher <cpolish@xxxxxxxxxxxx> wrote: > Hi all, > > I hope to reshape a RAID10 (near,2) with 2 failed and physically > removed members [_U_U] into a RAID1 hopefully [UU], for the > benefit of seeing a healthy status. > > Is following proposed invocation correct? > > mdadm --grow /dev/md2 --level=1 I think so. If not, mdadm will complain. It is quite easy to experiment: create some largish file, use losetup to turn them into block device. Then experiment with /dev/loop* NeilBrown > > Details: > > root@mencius $ mdadm --query --verbose --detail /dev/md2 > /dev/md2: > Version : 1.1 > Creation Time : Fri Jul 15 22:56:53 2011 > Raid Level : raid10 > Array Size : 1944916992 (1854.82 GiB 1991.59 GB) > Used Dev Size : 972458496 (927.41 GiB 995.80 GB) > Raid Devices : 4 > Total Devices : 2 > Persistence : Superblock is persistent > > Intent Bitmap : Internal > > Update Time : Tue Feb 25 22:00:46 2014 > State : active, degraded > Active Devices : 2 > Working Devices : 2 > Failed Devices : 0 > Spare Devices : 0 > > Layout : near=2 > Chunk Size : 512K > > Name : localhost.localdomain:2 > UUID : 971ee8b2:8d980355:0e5dfae9:c8bccd89 > Events : 5326341 > > Number Major Minor RaidDevice State > 0 0 0 0 removed > 1 8 19 1 active sync /dev/sdb3 > 2 0 0 2 removed > 3 8 3 3 active sync /dev/sda3 > root@mencius $ uname -a > Linux mencius 2.6.32-358.18.1.el6.centos.plus.x86_64 #1 SMP Wed Aug 28 16:14:04 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux > root@mencius $ mdadm --version > mdadm - v3.2.6 - 25th October 2012 > > > Thanks,
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