I was trying to move our ESX environment to Proxmox. The biggest issue we found is the shared storage. We can't find a good combination to be able to use with shared storage for fiber channel storage. We can get the LUN to appear in all the Hosts. However, there is no such file system that allows multiple host access. Is there a VMFS like file system that supports multiple host access? Based on my research, the only closest one is OCFS2, but Proxmox doesn't support it.