Damn good point badrobot with priority. It's the exact same way with my mobo and HDD's. I found out the hard way when connecting an old IDE drive for storage, then decided to do a clean install. The MBR was installed on the IDE drive by default (priority) and the rest on a HDD where I told it to install, then upon reboot I got the error message "no OS found". So I had to delete the MBR on the IDE drive, uplug the IDE drive, re-do the clean install and then the MBR was installed on the correct direct and I had a working OS. A real PITA for sure. Now I know....good catch.