DISK ARRAY CONTROLLER AND DISK ARRAY DEVICE

摘要

A disk array controller or a disk array system includes a disk array control unit having an MPU 8 and a user data transfer control unit having host interfaces 3 and 4 with a host computer 17, a memory 5 for temporarily storing data, a redundant data generator 7 for generating redundant data, multi-channel disk device interfaces 16a SIMILAR 16e and 12a SIMILAR 12e and a data transfer control circuit (DMAC) 6 for controlling the data transfer between the host interface, the memory, the redundant data generator and the disk device interface. Internal buses are of at least three-bus structure including a control bus (for MPU) 15, a host data bus 13 and a drive data bus 14.