First we need to understand why with LVM
Generally expand partition：Need to be adjacent。
advantage：LVM makes it easier to manage disk space。If the file system needs more space，Available space volume groups which may be assigned to a logical volume，And you can adjust the size of the file system。If a disk error began to appear，You may be replaced by a disk volume group registered as physical volumes，And the logical volume range can be migrated to a new disk。[……]