METHOD OF CONTROLLING DISK ARRAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a disk array device which prevents a decrease in performance in writing processing (write penalty) without increasing the cost. SOLUTION: An area on a disk drive 111 for writing stored data is divided into a temporary area for temporarily writing the stored data and a stored data area for finally writing the stored data. A microprocessor 105 writes external stored data to the temporary area temporarily without generating any redundant data and gives notice of writing completion to the outside after the writing to the temporary area is completed. After the writing completion is reported, a redundant information generating circuit 110 generates redundant data according to the stored data in the temporary area and a microprocessor 105 stores the redundant data in a redundant data area and writes the stored data to the stored data area.