As an ignorant noob, I think what makes your (and my) problem unique has nothing to do with the RAID but the focus should be "in my Mbox mini control panel, my device is listed as hardware not connected and not streaming" and "it doesn't even show up at all in my device manager." Unless our PCs are made of cottage cheese, it should show up. Maybe, just maybe, the MBox is the problem?
It makes me wonder if the unit (yours, mine) isn't fried. It gets enough juice to turn on the light, that's it, isn't sending ANY data to the PC. All drivers are installed. Systems conform to specs.
Did you remember to stand on your head when you installed Pro Tools? Supposed to do that -- undocumented of course. I think I might have forgotten to do that myself.