Well I got it working finally. I think I was correct in my original assumption (partially) that there was a screw mount on the case that was probably shorting the board. (One didn't line up where it should have). The second thing was I think what @cadre mentioned about overtightening the CPU. I removed everything, reseated it all and voila it posted!
So now my question is this, I can see all 8 drives in OMV now, all formatted, here are my questions:
- What file system should each drive be to maximize the setup with UnionFS?
- Best policy to use in UnionFS for mount options?
Also, is there anything else I should know for best practice settings for SnapRAID and UnionFS? I want to make sure I get this right from the start