I've never set ones of these up before so need some help! Currently I've got three hard drives split into nine partitions with none of them apart from my music backed up; so I'm thinking of buying a couple of 1TB or 1.5TB drives and setting up a RAID1 array. How do I do it? Can I mix non-RAID and RAID drives? My motherboard is an ASUS M4A78 Pro.