I have original drivers installed. Problem is that drivers support paths failover only when they are installed in exclusive mode. And your manual says that tape drivers must be installed in non exclusive mode.
Another problem that I had working situation with v8 when drivers were in exclusive mode. With v9 everything broke.
I contacted your support and I was told that Veeam does not support fault tolerant drives (with two FC paths). Advice was to disable one path:/ But what if I want to fave fault tolerant situation from the tape library perspective??????