major minor  #blocks  name

   8        0 7501410648 sda
   8        1 7501409280 sda1
   8       16 3750705496 sdb
   8       17     614400 sdb1
   8       18    1048576 sdb2
   8       19 1873710080 sdb3
 253        0   73400320 dm-0
 253        1    4194304 dm-1
 253        2 1796112384 dm-2
