I just bought my second 200gb hard drive, and am thinking of setting up a RAID. They are going to be used soley as storage space for downloaded junk. My operating system and installed programs are on a seperate hard drive. As I have the funds in the future, I hope to add another 2 drives as well. My first question would be is RAID 0 worth it? I read something claiming that it REDUCES the reliability of the hard drives. I know in the future I would like to move to a RAID 3, I belive it is, with 1 drive being for parity, which would help reduce my worries of reliability. Also, when I set up the RAID, will both drives need to be empty? My current 200gb hard drive has a ton of junk on it. Would I need to format it and start with 2 blank hard drives? Would I be able to move from RAID 0 to RAID 3 without starting fresh again?