A storage controller is a component that controls storage systems. Each storage component, whether hard disk and tape storage, storage array or flash memory has an individual storage controller.
Memory controllers determine on which memory area and which device the data is stored. When reading data, memory controllers ensure that the data stored on different memory areas from different storage devices is made available to the server as a self-contained data unit. In addition to reading and writing data, the storage controller performs processing tasks to implement a variety of value-added functions, including dynamic allocation of disk capacity and snapshot capture.