Hi guys, I want to install a Western digital velociraptor to my new computer. It will be a 300gb one and i can only afford 1 at the moment. But I want to later on add another 300gb one in raid 0, is this possible without deleting OS, programs etc.. how can i do it? do i need to back up everything? Also is the WD velociraptor fastest HDD out at the moment? and is it faster than 6gb/s HDD that starting to come out? Thanks people!