major minor  #blocks  name

   8        0   52428800 sda
   8        1    1048576 sda1
   8        2   47314944 sda2
   8        3    4064256 sda3
   8       16  104857600 sdb
   8       17  104857568 sdb1
  11        0    1048575 sr0
   7        0    2020352 loop0