On Monday November 25, krause@mogli-soft.de wrote: > > hello neilbrown, > > thanks a lot for your fast response! > i tried the command as you suggested but i am not sure if it really > worked, it seems that /dev/sdc2 is not yet used (but of course i may be > wrong! ;-) ) ..... > > what about disk /dev/sdc2 ? i have tried to access /dev/sdc1 (a small > ext2 partition) and the data there was correct, so it seems that the > disk is accessable and did not got damaged by the shot power failure. > > how can i get the third disk back into the raid system? or do i have to > backup all reconstructed data from the two disks and reinit the raid > from the start? mdadm -A --force will only 'force' into the array enough drives to make it work. For your 3 drive raid5 array, it ony needs to force in 2 drives, so it takes the two most recent drives and uses them. They will have all the data on them, but no redundancy. I suggest that after assembling the array, you 'fsck' the filesystem on md0 just to make sure that the data is fine and then simply hot-add the third device: mdadm /dev/md0 -a /dev/sdc If fsck reports lots of error..... maybe try force the assmbly from a different pair of drives. e.g. mdadm -A --force /dev/sda1 /dev/sdc2 and then do the fsck. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
