System for configuring a duplex shared storage

摘要

A shared storage configuration system for use in a computer system includes a plurality of processing modules. Each of the processing modules includes at least a main storage unit, a central processing unit and a connecting unit for connection to a system bus. The shared storage system also includes a plurality of shared storage modules. Each of the shared storage modules includes a shared storage unit and a connection unit for connection to the system bus. A space inherent in the processing modules is accessible by physical addresses of said central processing unit of each of the processing modules. A shared storage space is accessible by the physical addresses of said central processing unit of each of the processing modules. Further, the shared storage space is divided into a partially-shared storage space, a duplex configuration of the shared storage module is defined for each part of the partially-shared storage space, and another shared storage module is specified having an inverted value in a specific bit of its unit ID, in contrast with a unit ID of the shared storage module corresponding thereto.