1. A method of transmitting data between storage virtualization controllers in a computer system, the method comprising the steps of: a central processing unit (CPU) of a first storage virtualization controller (SVC) sending a direct data transfer request to a CPU chipset of the first SVC; and a first interface in the CPU chipset reading the direct data transfer request, in which the first interface is coupled to a second virtualization controller through a communication channel, and transfers the direct data transfer request to the second virtualization controller via the communication channel, wherein a second interface in the second virtualization controller receives the direct data transfer request.