Patent 7937553 was granted and assigned to Hitachi on May, 2011 by the United States Patent and Trademark Office.
A storage controller of the present invention partitions and allocates a virtual memory area to each of a plurality of functions operating simultaneously. Microprocessors inside a higher-level communications controller can respectively execute a plurality of program products. A virtual memory created using a local memory is partitioned into a plurality of areas. The partitioned areas are allocated to the respective program products via queues.