I have a Dell R9000 server connected via Fibre Switch to a TL4000 tape library and for some reason it cannot detect it in device manager. I don't see the medium changer or tape drive. The Changer Bus Enumerator shows up under "system devices" and so does Tape Bus Enumerator.
I've tried reinstalling the drivers on the server and upgraded the library firmware to the latest release. The HBA and FC switch look good and are online. Any help would be greatly appreciated. thx