Yep.. I217V is not supported in RELEASE versions of FreeNAS at this time.
This also means you are likely using desktop components (bad idea), which also means you don't have ECC RAM (another bad idea) and probably didn't give our stickies a good read (yet another bad idea).
I'd stop and figure out what you are actually doing. This smells of "I'm gonna have major problems later and I may lose my data" written all over it.