major minor  #blocks  name

 252        0   41943040 vda
 252        1     204800 vda1
 252        2    1048576 vda2
 252        3   40687616 vda3
  11        0    1048575 sr0
 252       16   52428800 vdb
 253        0   36491264 dm-0
 253        1    4194304 dm-1
