Resizing a Physical Volume
If you need to change the size of an underlying block device for any reason, use the pvresize command to update LVM with the new size. You can execute this command while LVM is using the physical volume.
EXAMPLES
Expand the PV on /dev/sda1 after enlarging the partition with fdisk:
Shrink the PV on /dev/sda1 prior to shrinking the partition with fdisk (ensure that the PV size is appropriate for your intended new partition size):
RESTRICTIONS
pvresize will refuse to shrink PhysicalVolume if it has allocated extents after where its new end would be. In the future, it should relocate these elsewhere in the volume group if there is sufficient free space, like pvmove does.
pvresize won’t currently work correctly on LVM1 volumes or PVs with extra metadata areas
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