On 30 October 2011 15:34, Michael Busby <michael.a.busby@xxxxxxxxx> wrote: > On 30 October 2011 14:57, Michael Busby <michael.a.busby@xxxxxxxxx> wrote: >> I have a system the was doing a reshape from RAID5 to 6, the system >> had to be powered off this morning and moved, upon restarting the >> server i issued the following command to continue the reshape >> >> mdadm -A /dev/md0 --backup-file=/home/md.backup >> >> i get back to following error >> >> mdadm: Failed to restore critical section for reshape, sorry. >> >> any idea why? >> >> before shutting down cat /proc/mdstat showed >> >> Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] >> [raid4] [raid10] >> md0 : active raid6 sdf[0] sdb[6](S) sda[4] sdc[3] sde[2] sdd[1] >> 7814055936 blocks super 1.0 level 6, 512k chunk, algorithm 18 >> [6/5] [UUUUU_] >> [==============>......] reshape = 70.8% (1384415232/1953513984) >> finish=3658.6min speed=2592K/sec >> >> but now it shows >> >> Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] >> [raid4] [raid10] >> md0 : inactive sdc[3] sdb[6](S) sde[2] sdd[1] sdf[0] >> 9767572240 blocks super 1.0 >> >> i am totally confused, it seems to have lost a drive from the raid, >> and the number of blocks is incorrect >> > > issuing the following > > mdadm -Avv --backup-file=/home/md.backup /dev/md0 > > returns > > > mdadm: looking for devices for /dev/md0 > mdadm: cannot open device /dev/sda5: Device or resource busy > mdadm: /dev/sda5 has wrong uuid. > mdadm: no RAID superblock on /dev/sda2 > mdadm: /dev/sda2 has wrong uuid. > mdadm: cannot open device /dev/sda1: Device or resource busy > mdadm: /dev/sda1 has wrong uuid. > mdadm: cannot open device /dev/sda: Device or resource busy > mdadm: /dev/sda has wrong uuid. > mdadm: /dev/sdg is identified as a member of /dev/md0, slot -1. > mdadm: /dev/sdf is identified as a member of /dev/md0, slot 4. > mdadm: /dev/sdd is identified as a member of /dev/md0, slot 2. > mdadm: /dev/sde is identified as a member of /dev/md0, slot 0. > mdadm: /dev/sdc is identified as a member of /dev/md0, slot 1. > mdadm: /dev/sdb is identified as a member of /dev/md0, slot 3. > mdadm:/dev/md0 has an active reshape - checking if critical section > needs to be restored > mdadm: backup-metadata found on /home/md.backup but is not needed > mdadm: Failed to find backup of critical section > mdadm: Failed to restore critical section for reshape, sorry. > seem the above was trying at use the wrong disks to assemble, so using the following mdadm -Avv /dev/md0 --backup-file=/home/md.backup /dev/sd[abcdef] mdadm: looking for devices for /dev/md0 mdadm: /dev/sda is identified as a member of /dev/md0, slot 4. mdadm: /dev/sdb is identified as a member of /dev/md0, slot -1. mdadm: /dev/sdc is identified as a member of /dev/md0, slot 3. mdadm: /dev/sdd is identified as a member of /dev/md0, slot 1. mdadm: /dev/sde is identified as a member of /dev/md0, slot 2. mdadm: /dev/sdf is identified as a member of /dev/md0, slot 0. mdadm:/dev/md0 has an active reshape - checking if critical section needs to be restored mdadm: backup-metadata found on /home/md.backup but is not needed mdadm: Failed to find backup of critical section mdadm: Failed to restore critical section for reshape, sorry. -- 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
