retitle 495580 Kernel doesn't start a resync after adding a disk. thanks Am Dienstag, den 19.08.2008, 20:28 +0200 schrieb martin f krafft: > I don't follow you, sorry. If you want, you can try to restate your > case in German.
Thank you very much. You got me now on the right track. Sorry for the confusion, I really have to work on this. I wanted to report a bug with the 2.6.27-rc3 kernel. The current Debian sid kernel 2.6.26-2 does sync the disks if I add them. I tried now even the newer 2.6.27-rc3-git6 out, because it has a few MD changes. That one adds the disks only as `spare' but does not start a resync. I don't know if and how you want to handle this. Probable this has been already noticed upstream, but I failed to find this out. So please feel free to just close it.
Linux fz-vm 2.6.26-1-amd64 #1 SMP Fri Aug 8 13:17:41 UTC 2008 x86_64 fz-rescue:/etc# cat /proc/mdstat Personalities : [raid10] md0 : active (auto-read-only) raid10 sdc1[0] sdf1[3] sde1[2] sdd1[1] 16771584 blocks 64K chunks 2 near-copies [4/4] [UUUU] fz-rescue:/etc# mdadm -f /dev/md0 /dev/sdc1 mdadm: set /dev/sdc1 faulty in /dev/md0 fz-rescue:/etc# mdadm -r /dev/md0 /dev/sdc1 mdadm: hot removed /dev/sdc1 fz-rescue:/etc# mdadm -a /dev/md0 /dev/sdc1 mdadm: re-added /dev/sdc1 fz-rescue:/etc# mdadm -Q --detail /dev/md0 /dev/md0: Version : 00.90 Creation Time : Wed Aug 20 09:12:05 2008 Raid Level : raid10 Array Size : 16771584 (15.99 GiB 17.17 GB) Used Dev Size : 8385792 (8.00 GiB 8.59 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Wed Aug 20 09:31:33 2008 State : clean, degraded, recovering Active Devices : 3 Working Devices : 4 Failed Devices : 0 Spare Devices : 1 Layout : near=2, far=1 Chunk Size : 64K Rebuild Status : 14% complete UUID : 52bc96be:8daa6302:b2ae9613:7c966e04 Events : 0.10 Number Major Minor RaidDevice State 4 8 33 0 spare rebuilding /dev/sdc1 1 8 49 1 active sync /dev/sdd1 2 8 65 2 active sync /dev/sde1 3 8 81 3 active sync /dev/sdf1 fz-rescue:/etc# cat /proc/mdstat Personalities : [raid10] md0 : active raid10 sdc1[4] sdf1[3] sde1[2] sdd1[1] 16771584 blocks 64K chunks 2 near-copies [4/3] [_UUU] [====>................] recovery = 20.5% (1728000/8385792) finish=1.2min speed=90947K/sec unused devices: <none>
Linux fz-vm 2.6.27-rc3-git6 #2 SMP Tue Aug 19 22:31:51 CEST 2008 x86_64 fz-vm:~# mdadm -f /dev/md0 /dev/sdc1 mdadm: set /dev/sdc1 faulty in /dev/md0 fz-vm:~# mdadm -r /dev/md0 /dev/sdc1 mdadm: hot removed /dev/sdc1 fz-vm:~# mdadm -a /dev/md0 /dev/sdc1 mdadm: re-added /dev/sdc1 fz-vm:~# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] md0 : active raid10 sdc1[4](S) sdf1[3] sde1[2] sdd1[1] 16771584 blocks 64K chunks 2 near-copies [4/3] [_UUU] unused devices: <none> fz-vm:~# mdadm -Q --detail /dev/md0 /dev/md0: Version : 00.90 Creation Time : Wed Aug 20 09:03:27 2008 Raid Level : raid10 Array Size : 16771584 (15.99 GiB 17.17 GB) Used Dev Size : 8385792 (8.00 GiB 8.59 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Wed Aug 20 09:07:32 2008 State : clean, degraded Active Devices : 3 Working Devices : 4 Failed Devices : 0 Spare Devices : 1 Layout : near=2, far=1 Chunk Size : 64K UUID : 04e72c15:980e57a0:89ccbef7:ff5abfb0 (local to host fz-vm) Events : 0.10 Number Major Minor RaidDevice State 0 0 0 0 removed 1 8 49 1 active sync /dev/sdd1 2 8 65 2 active sync /dev/sde1 3 8 81 3 active sync /dev/sdf1 4 8 33 - spare /dev/sdc1 fz-vm:~# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] md0 : active raid10 sdd1[4](S) sdc1[5](S) sdf1[3] sde1[2] 16771584 blocks 64K chunks 2 near-copies [4/2] [__UU] unused devices: <none> fz-vm:~# mdadm -Q --detail /dev/md0 /dev/md0: Version : 00.90 Creation Time : Wed Aug 20 09:03:27 2008 Raid Level : raid10 Array Size : 16771584 (15.99 GiB 17.17 GB) Used Dev Size : 8385792 (8.00 GiB 8.59 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Wed Aug 20 09:08:13 2008 State : clean, degraded Active Devices : 2 Working Devices : 4 Failed Devices : 0 Spare Devices : 2 Layout : near=2, far=1 Chunk Size : 64K UUID : 04e72c15:980e57a0:89ccbef7:ff5abfb0 (local to host fz-vm) Events : 0.18 Number Major Minor RaidDevice State 0 0 0 0 removed 1 0 0 1 removed 2 8 65 2 active sync /dev/sde1 3 8 81 3 active sync /dev/sdf1 4 8 49 - spare /dev/sdd1 5 8 33 - spare /dev/sdc1