My hard drive is having major performance drops (down to 18mb/s) that reflects in gaming. Is it possible to buy another hard drive and put them in raid configuration that would increase read speed also acting as backup. How do I do that, and will the other HD be tied down by the slower HD, or will it compensate for it's performance drops. Also I heard there's RAID 0+1 meaning there're 3 hds how does that work?