Regarding the 2 drive (perhaps I should say - more than one drive) issue the Install alongside option has an existing problem in that regard - see bug #1262824. The one good thing about that particular scenario is that if the wrong drive is selected you do still have the option of selecting the advanced partitioning tool from that screen if the wrong drive is selected by default.
Regarding the 2 drive (perhaps I should say - more than one drive) issue the Install alongside option has an existing problem in that regard - see bug #1262824. The one good thing about that particular scenario is that if the wrong drive is selected you do still have the option of selecting the advanced partitioning tool from that screen if the wrong drive is selected by default.