Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
md1 : active raid1 sdb4[1](S) sda4[0]
      2908649280 blocks super 1.2 [2/1] [U_]
      [===>.................]  recovery = 18.4% (535323008/2908649280) finish=276.5min speed=143050K/sec
      
md0 : active raid1 sdb3[1](S) sda3[0]
      19514240 blocks super 1.2 [2/1] [U_]
      
unused devices: <none>