root@server:/back# cat /proc/mdstat
Personalities : [raid10]
md0 : active raid10 sda3[0] sdc2[2]
      483169280 blocks super 1.2 2 near-copies [2/1] [U_]
      [=>...................]  recovery =  7.9% (38376384/483169280) finish=7047.5min speed=1051K/sec

md1 : active (auto-read-only) raid10 sda2[0] sdc1[2](S) sdb1[1]
      4191744 blocks super 1.2 2 near-copies [2/2] [UU]

unused devices: <none>