major minor  #blocks  name

   8       16  488386584 sdb
   8        0  488386584 sda
   8        1     291840 sda1
   8        2          1 sda2
   8        5  488091648 sda5
  11        0    1048575 sr0
 253        0   19529728 dm-0
 253        1    1949696 dm-1