http://echenh.blogspot.co.nz/2010/04/how-to-extend-lvm-on-vmware-guest-os.html
http://conrey.org/2011/05/18/lvm-and-vmware-linux-guests-just-do-it/
1. Increase Disk Size
2. Create Partition for used space using cfdisk / Primary Disk
3. pvcreate /dev/sda3
4. vgextend vg_vmlinuxcentos6 /dev/sda3
5. lvextend -l +100%FREE /dev/vg_vmlinuxcentos6/lv_root
6. lvdisplay
7. resize2fs /dev/vg_vmlinuxcentos6/lv_root