Main LVM configuration

# fdisk -l /dev/sda
...
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      499711      248832   83  Linux
/dev/sda2          501758   156301311    77899777    5  Extended
/dev/sda5          501760   156301311    77899776   8e  Linux LVM

# pvdisplay 
  --- Physical volume ---
  PV Name               /dev/sda5
  VG Name               kvm2
  PV Size               74.29 GiB / not usable 2.00 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              19018
  Free PE               14635
  Allocated PE          4383
  PV UUID               xxxxx

# lvdisplay 
  --- Logical volume ---
  LV Name                /dev/kvm2/root
  VG Name                kvm2
  ...
  --- Logical volume ---
  LV Name                /dev/kvm2/swap_1
  VG Name                kvm2
  ...