On Wed, 16 Feb 2011 10:46:32 -0500 Tobias McNulty <tobias@xxxxxxxxxxxxxxx> wrote: > Hi, > > I tried to start a reshape over the weekend (RAID6 -> RAID5) and was > dismayed to see that it was going to take roughly 2 weeks to complete: > > md0 : active raid6 sdc[0] sdh[5](S) sdg[4] sdf[3] sde[2] sdd[1] > 5860543488 blocks super 0.91 level 6, 64k chunk, algorithm 2 [5/5] > [uuuuu] [>....................] reshape = 0.0% (245760/1953514496) > finish=21189.7min speed=1536K/sec > > The disk that contained the backup file began experiencing SATA errors > several days into the reshape, due to what turned out to be a faulty > SATA card. The card has since been replaced and the RAID1 device that > contains the backup file successfully resync'ed. > > However, when I try to re-start the reshape now, I get the following error: > > nas:~# mdadm --assemble /dev/md0 --backup-file=md0.backup /dev/sdc > /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh > mdadm: Failed to restore critical section for reshape, sorry. > > Is my data lost for good? Is there anything else I can do? Try above command with --verbose. If a message about "too-old timestamp" appears, run export MDADM_GROW_ALLOW_OLD=1 and run the command again. In either case, post the output. 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
