[ovirt-users] Storage, extend or new lun ?

Dear All, I've oVirt 3.5.3-1-1.el6 with two kind of storage , NFS and Fibre Channel. Each Hypervisor has HBA controller and Data CLutser has four Storage named: DATA_FC, DATA_NFS, EXPORT and ISO-DOMAIN. Anybody know how can I extend a DATA_FC ? Which is the best practies ? Extend LUN from HP MSA controller or adding a new lun ? if I extend lun inside HP MSA oVirt see the new size ? Enrico Thanks a lot. Best Regards