sh-3.1# cat /proc/partitions 
major minor  #blocks  name

   8     0 1249955840 sda
   8     1     104391 sda1
   8     2 1249848967 sda2
 253     0   16777216 dm-0
 253     1 1186889728 dm-1
 253     2    4194304 dm-2
 253     3   16777216 dm-3
 253     4   16777216 dm-4
 253     5    8388608 dm-5