It's not hardware RAID. The RAID is handled by the BIOS (firmware, still running on your CPU) until Windows starts to boot, at which point Intel's driver (Matrix Storage Manager, i.e. software) takes ...

I got an OWC USB/FW400/FW800 dual-drive enclosure and 2x1.5TB disks for a RAID mirror array. I bought the bare enclosure from OWC and the 2 drives from dell when they were on sale; they are identical ...