My setup as follows:-
ML-6000 with 2 IBM LTO4 drives (FC)
M600 with LPe1105-M4 daughter card.
M1000e chassis with 2 PT1016 FC passthu's.
Current backup solution uses old 2950 with QLogic FC cards for which there is an option to enable tape support in the configuration however, I have been unable to find the corresponding option in the setup of the Emulex cards?