STORAGE SYSTEM

摘要

In the present invention, even if the capacity of shared memory in a storage system changes, a control device within the storage system indicates and accesses a fixed virtual address for a specified storage area within the shared memory. The space of a physical address that indicates a storage area within a plurality of memories in a host control subsystem that is one of two control subsystems, and the space of a physical address that shows a storage area within a plurality of memories in a control subsystem that is the other of the two control subsystems are associated with the space of a virtual address used by an input/output device and a processor within the host control subsystem. When a relay device receives data transmitted from the other control subsystem to the host control subsystem, the virtual address that is indicated by the other control subsystem and that shows the transmission destination of data is converted to a virtual address within the host control subsystem on the basis of a preset offset, and the data is transmitted to the converted virtual address.