major minor  #blocks  name

   8       16  976762584 sdb
   8        0  976762584 sda
   8        1     975872 sda1
   8        2          1 sda2
   8        5  975783936 sda5
 254        0   19529728 dm-0
 254        1    1949696 dm-1
 254        2 1920577536 dm-2
 254        3   10485760 dm-3