# cat /proc/mdstat

Personalities : [raid1]
md2 : active raid1 sda3[2] sdb3[1]
      112326400 blocks [2/1] [_U]
      [===>.................]  recovery = 17.7% (19909120/112326400) finish=20.3min speed=75592K/sec

md1 : active raid1 sda2[0] sdb2[1]
      29302464 blocks [2/2] [UU]

md0 : active raid1 sda1[0] sdb1[1]
      14659200 blocks [2/2] [UU]

unused devices: <none>