eternus dx90 s2

Hello, I'm a beginner in proxmox so maybe I'm doing something wrong or misunderstood. I have a problem with 2xnodes Fujitsu RX300 S7 with connected 2x Fibre Channel to each node by Emulex Lightpulse to storage Eternus DX90 S2. I want to do HA cluster - I have on other machine - Dell R620...