I originally posted this over at superuser but I thought maybe I would find more LVM experts here that might know the answer. I have a failed raid-5 array that I can't seem to recover. Basically the story is I had this data in raid 5 and I was using LVM which has built-in raid now. I noticed one of the disks going bad so I got a new one and issued pvmove to move the extents from the failing disk to the new disk. Some time during the migration, the old disk failed and completely stopped responding (not sure why it would cause that). So I rebooted it and now the array doesn't come up at all. Everything looks well enough, e.g. 3/4 disks are working, and I'm pretty sure even the failed one is back up temporarily (don't trust it though). But when I issue lvchange -a y vg-array/array-data I get a failure with the following in dmesg not clean -- starting background reconstruction device dm-12 operational as raid disk 1 device dm-14 operational as raid disk 2 device dm-16 operational as raid disk 3 cannot start dirty degraded array. I'm pretty sure there are ways to force the start using mdadm but I havent seen anything for lvm. But since I have three disks, all my data is there so it must be recoverable. Does anyone know how to do it? To summarize, it's a 4 disk raid 5 array, 3/4 disks are working, but I still am not able to start the logical volume even in degraded mode to copy the data off of it _______________________________________________ linux-lvm mailing list linux-lvm@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
