Hey, I am completely getting rid of two of my harddrives 500gb x2 and upgrading both to SSD. One 500GB the other 120GB ( I got this as a hand me down). My question is this, is there anything I need to do before doing a clean install on a SSD? I know I need to change the sata mode to ACHI in bios settings. However, what is raid? And is this something necarrsy when you have more than one storage device? Also, should I only hook up the 500GB SSD first when I perform the clean install then add the other? Thanks in advance for replies.