md1 : active raid1 sdb1[0] sda1[1]
      39060416 blocks [2/2] [UU]
      bitmap: 6/150 pages [24KB], 128KB chunk

md4 : active raid1 sda4[0] sdb4[1]
      9968256 blocks [2/2] [UU]
      bitmap: 0/153 pages [0KB], 32KB chunk

md3 : active raid1 sda3[0] sdb3[1]
      732419328 blocks [2/2] [UU]
      bitmap: 0/175 pages [0KB], 2048KB chunk

md2 : active raid1 sdb2[1] sda2[0]
      195310144 blocks [2/2] [UU]
      bitmap: 0/187 pages [0KB], 512KB chunk
