pvresize --setphysicalvolumesize 30G /dev/sdb5
Reducing a LVM physical volume that has unallocated space in it is pretty simple. For example, to reduce the size of /dev/sda1 to 40 GiB:
pvresize --setphysicalvolumesize 30G /dev/sdb5
Reducing a LVM physical volume that has unallocated space in it is pretty simple. For example, to reduce the size of /dev/sda1 to 40 GiB: