Patent 11237746 was granted and assigned to Hitachi, Ltd. on February, 2022 by the United States Patent and Trademark Office.
In a storage system, attributes of nodes are specified as first attribute nodes and second attribute nodes, the I/O processing in the nodes is executed as a plurality of processes including front-end I/O processing executed by any of the first attribute nodes and back-end I/O processing executed by the first and second attribute nodes having a storage device that stores data relating to the I/O processing.