ARRANGEMENT OF CACHE MEMORY IN DISK CONTROLLER

摘要

PROBLEM TO BE SOLVED: To improve the performance of a disk controller by dispersing nonvolatile cache memories for high throughputs, and optimizing the capacity of the cache memory. SOLUTION: The disk controller includes a channel I/F control circuit 1 connected to a host device; a channel control unit 12 having a data pass switch 11 for switching the flow of data; a disk drive 8; a disk control circuit 7 for controlling the disk drive; and a disk control unit 9 having a cache memory 13 between the data pass switch and the disk control circuit. The cache memory is provided for each disk control circuit and a pair of disk control circuits is provided for each disk drive. The pair of cache memories 13 and 23 provided for each disk drive is diagonally connected to the disk control circuits 7 and 26. COPYRIGHT: (C)2003,JPO