We currently have existing LUNS on our Axiom Pillar 300 SAN. The LUNS are mapped to physical servers. We are now implementing a HyperV cluster. The physical servers will be converted to virtual servers. Once the servers have been converted to virtual, we would like to move the lun over to the VM as a pass through disk. My question is this. When I map the luns to the HyperV Host servers (3 of them) and I have to initialize the LUN will I lose any data?