drive prevents boot

Recently upgraded to El Capitan. I have everything working with a slight stability issue, system sometimes shuts down on its own. However, I still have not been able to enable my onboard USB 3.0 and every time I try to boot with and of two drives in my raid, I never makes it to Clover, the...

I am using an old Dell Optiplex 755 to make my first hackintosh. The specs are as follows: Intel Core 2 Duo E8200 2.66 GHz 2GB DDR2 RAM 2 dimms Dell Optiplex 755 DT motherboard I am not able to reach Chimera when my hard drive is connected. It gets stuck at a screen displaying "\". Without the...