Patent ID: 6269424
Filing Date: 2001-07-31
Classification: G06F

Abstract:
A disk array device comprising:a plurality of disk drives for saving data to be sent to a host system;a subset of said disk drives comprising a specific data group for saving write data received from said host system and at least one piece of redundant data generated from said write data, each of said disk drives containing a redundant data generating circuit for generating the redundant data from the data received from said host system and the data read from said disk drives;a disk control device for controlling data transfer between said host system and one of said disk drives;said disk control device having a redundant data generating circuit and a processor for selecting said redundant data generating circuit inside of said one of said drives or said redundant data generating circuit inside of said disk control device; andwherein said processor serves to select one of the following:a use of said redundant data generating circuit inside of said one of said drives,a use of said redundant data generating circuits inside of said one of said drives and said control device, ora use of said redundant data generating circuit inside of said control device.