I also found this,
> Board is an Asus M2N-SLI Deluxe (AM2), says it has hardware raid
> (Raid0,raid1, raid0+1, raid 5, and JBOD via the onboard NVIDIA
> MediaShield RAID controller. This sounds like hardware raid to me and
> is configured via the bios menus.
It is fake raid. It is not hardware raid. At best it may have an xor engine in the chipset that the driver/bios can use to reduce the cpu load. Marketing people think anything done in the bios makes it hardware. They would claim a winmodem is entirely a hardware modem too.