PARITY DATA WRITING SYSTEM FOR DISPLAY ARRAY DEVICE

摘要

PROBLEM TO BE SOLVED: To improve the performance of read/write processing of a disk array device by reducing the application ratios of control devices and resources to be used for the generation and writing of new parity data and allocating the control devices and the resources to the read/write processing, based on requests from a host computer. SOLUTION: Out of host data write processing, parity data generation processing and parity data write processing to be performed by the control devices in a conventional system, the parity data generation processing and the parity data write processing are performed not by the control devices but by parity generation devices. Since data transfer to be performed at the parity generation is performed directly between the parity generation devices without passing the control devices, the resources of the control devices are not used at all.