CreatePhysicalVolume creates a physical volume of the given device.

CreateVolumeGroup creates a new volume group.

PVScan runs the `pvscan --cache <dev>` command.

ValidateLogicalVolumeName validates a volume group name.

ValidateTag validates a tag.

ValidateVolumeGroupName validates a volume group name.

VGScan runs the `vgscan --cache <name>` command.