How much is the CPU involved in disk operations. Let's say I have a long disk operation such as copying a large file for several minutes. When I look at the CPU utilization on my computer (Windows XP), it's pretty low; basically zero. So how involved in such an operation is the CPU? Does it just tell the disk to do something and checks back in with the operation every so often to see if it's complete? Should I be able to do CPU intensive tasks like play games while and disk operation is occurring? What if several disk operations are going on at the same time? Is that more CPU intensive? Are lots of small CPU operations more intensive than one large one? What about other types of I/O such as network and memory? How do those affect the CPU?