root@office:~# cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 md126p1[0]
      194548 blocks super 1.2 [2/1] [U_]

md1 : active raid1 md126p3[0]
      484282232 blocks super 1.2 [2/1] [U_]

md126 : active raid1 sda[1] sdb[0]
      731445248 blocks super external:/md127/2 [2/2] [UU]

md127 : inactive sda[1](S) sdb[0](S)
      2258672 blocks super external:ddf