The Research and Implement of a Dual-Controller System

With the rapid development of information construction around the world, it needs special storage system to provide a stable, reliable, safe data storage service. This paper develops a Dual-Controller system which adds the hardware level redundant relative to Single-Controller system, so it has high stability and reliability in the level of disk and controller. It can satisfy the requirements of storage service stability of higher industry. The Dual-Controller system uses the special heart module between the controllers for communication. So when the system is running, one controller is always getting the mirror controller's state, which helps to detect the fault when the mirror controller is fault. We create the CACHE module to maintain two types of data of CACHE and MIRROR. The experimental result shows the performance of Dual-Controller system is almost the same with the Single-Controller system, but the Dual-Controller system won't loss the data and can continue to provide data services.