chanel fanny packs|Chanel Waist Bags August 9, 2015. by Ed Chen. When we have space pressure on logical volumes (LV), we will seek for free space (or you may say unused space) in volume groups (VG) first. If there's no free space left for increasing the size of LV, it's time to add some physical volumes (PV) to the VG. Let's check the VG and see what situation we are in. Subscribe