VIA is the make and RAID is when you have more than one identical hard drive in your computer and use them together.
You get different types of RAID, the two most common ones are, it copies all info onto 2 hard drives so that if a hard drive fails you still have all info on the other one and another copies part of all info onto each hard drive so that you can speed up the retreaval of info as you take part of the info from each drive at the same time.
Sorry I'm not explaining this too well.
Does your computer have 2 hard drives? If not then ignore the RAID thing as it was probably installed as part of the motherboard software and isn't actually doing anything anyway.