RAID is short for Redundant Array of Independent (or Inexpensive) Disks.
It is a category of disk drives that employ two or more drives in combination with fault tolerance and performance management systems.
A processor is the logic circuitry that responds to and processes the basic instructions that drive a computer.
The term processor has generally replaced the term central processing unit (CPU) that has been used in early generations of computers. The processor in a personal computer or embedded in small devices is often called a microprocessor.