I'm running a Centos 6.7 server on software RAID 1 as follows: Softalicious Virtualizor with dual virtualization (KVM & OpenVZ) - KVMData LVM /dev/vg Size:1862.63 GB Free:940.63 GB - OVZData OpenVZ /vz Size:590.46 GB Free:21.38 GB (This number is the basis of my need) I need to increase the size of "OVZData" which means I need to shrink "KVMData". Can this be done and if so, how? I'm comfortable with resizing LV groups but not so sure about a VG. Any help is greatly appreciated. A little more specifics: