I'm thinking about taking my 1TB internal SATA drive out of my iMac and setting up a 4TB raid. My plan is to swap the 1TB drive out for a 2TB, then swap out the CD/DVD drive for another 2TB. Is this all I would need? 2x 2TB 3.5 SATA Drives 1 Optical Hard Drive Bay How exactly would the raid process work? I want to set the drives up so my iMac drive says it's 4GB (or you know, about 4GB) on a single drive. Can I do that with software (ie disk utility) or do I need some kind of hardware solution? I don't think I've ever built a raid.