This was solved awhile back and a user on the ProxMox support forums suggested that the answer also be posted here for general FYi.. that URL is http://forum.proxmox.com/threads/20602-using-iSCSI-as-Backup-Storage or in plain text http://forum.proxmox.com/threads/20602-using-iSCSI-as-Backup-Storage

I am having this problem when i already created an iSCSI target with latest Starwind on a Win7 macchine. I am trying to attach to this from across LAN with a ProxMox server. The ProxMOX cannot see the LUN, its not selectable. Wondering if i can use Starwind on Win7 for this purpose. I wanted to then...