On Sat, 09 Apr 2011 09:23:52 -0700 "Edward Siefker" <hatta00@xxxxxxxxxxx> wrote: > I have a 3 disk raid-5 array I want to convert to a 4 disk raid-6 array. > I added the 4th disk as a spare, and thought that it would get used > automatically when I converted it to 6, but instead it created a > degraded > raid 6 array. So I removed the spare and added it back to the array to > get it to rebuild. It did start rebuilding, but stalled out. > > Here's some console output showing what I did: > > root@iblis:/home/hatta# mdadm --grow /dev/md2 --level 6 --raid-devices 4 > --backup-file=/mnt/sda6/yo > mdadm level of /dev/md2 changed to raid6 > root@iblis:/home/hatta# cat /proc/mdstat > Personalities : [raid10] [raid6] [raid5] [raid4] > md2 : active (auto-read-only) raid6 sdd1[0] sde1[3](S) sdf1[2] sdc1[1] > 2930271872 blocks level 6, 64k chunk, algorithm 18 [4/3] [UUU_] > > root@iblis:/home/hatta# mdadm /dev/md2 --remove /dev/sde1 > mdadm: hot removed /dev/sde1 from /dev/md2 > root@iblis:/home/hatta# mdadm /dev/md2 --add /dev/sde1 > mdadm: re-added /dev/sde1 > root@iblis:/home/hatta# cat /proc/mdstat > Personalities : [raid10] [raid6] [raid5] [raid4] > md2 : active raid6 sde1[4] sdd1[0] sdf1[2] sdc1[1] > 2930271872 blocks level 6, 64k chunk, algorithm 18 [4/3] [UUU_] > [>....................] recovery = 0.0% (8192/1465135936) > finish=11899.9min speed=2048K/sec > ... > ... > ... > md2 : active raid6 sde1[4] sdd1[0] sdf1[2] sdc1[1] > 2930271872 blocks level 6, 64k chunk, algorithm 18 [4/3] [UUU_] > [>....................] recovery = 0.0% (8192/1465135936) > finish=2954174.4min speed=8K/sec > > > What's going on here? Doesn't look good.. What version of mdadm? What kernel? 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
