From VIA Technologies:
VIA RAID driver v3.00b is a combo driver for VIA VT6410, VT6420, VT6421, and VT8237 SATA RAID controller. The advanced VIA DriveStation V-RAID Controller is featured in the VT8237 South Bridge, currently shipping with most KT600 chipset mainboards and soon to ship with PT800 chipset mainboards (and future chipsets as well). If you are not sure what South Bridge chip is featured on your motherboard, please check your manual. The VT6420 Serial RAID controller also utilises the same driver package.
The VT8237 native Serial RAID solution enables users to benefit from the performance and data security benefits of a high-end RAID system, but without the normally complicated setup procedures. Users do, however, need to have a basic understanding of RAID and how it works in order to be able to choose the best set up for their requirements and in order to be able to understand the set up procedures.