I'm putting the 1tb in the HD Bay and a 640GB in the Optibay. The 640GB has the OS with Bootcamp on it.
Will the MBP automatically start up from the 640GB in the Opitbay?
Will Windows from Bootcamp automatically start up from the 640GB in the Optibay?
I plan to just use the 1tb for storage and since it's 12.5mm it won't fit in the Optibay. I don't want to have to re-install the OS's on the 1tb if I don't have to.
Yes.
Yes.
The 12.5mm will fit in the optibay.