hey! today i am getting my new 250 gb HD because it crashed. so right now i have a 160gb with lots of info! i dont know whether to make the 250gb a slave or not also it s capable of 3.0gb/s and my 160gb is capable of 1.5gb/s so cna one run in 3.0 gb/s amd one in 1.5gb/s????? and my new one is a seagate 7200.10 perpendicular drive!