mdadm - Recovering a 'split' RAID1 array
- by Hamza
I have two drives that used to be part of a single RAID1 volume but it appears that one of them went offline for some time, something I've noticed just now when I rebooted my system.
I now seem to have two RAID volumes, as reported by:
# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md126 : active raid1 sdc[1]
2096116 blocks super 1.2 [2/1] [_U]
md127 : active (auto-read-only) raid1 sdb[0]
2096116 blocks super 1.2 [2/1] [U_]
unused devices: <none>
Not exactly sure where to go from here. How can I merge and re-sync these volumes without data loss?
Thanks.