RAID: Something geeks often do because they can
HelpMeRick.com is not a geek website so I'm not even going to get into what RAID is other than it is something geeks do to their computers.
However, I will say that I have had a number of clients over the years who have had a friend, relative or computer salesman talk them into going with a RAID setup and it has turned out to be a giant problem.
Often RAID is installed as a "backup" system. Essentially this type of RAID setup uses two hard drives. Whatever happens on the first hard drive is automatically duplicated on the second hard drive.