major minor  #blocks  name

   8        0 1952147456 sda
   8        1     512000 sda1
   8        2 1951634432 sda2
   8       16 21473622016 sdb
 253        0 1947439104 dm-0
 253        1    4194304 dm-1
 253        2 21473619968 dm-2
