Storage subsystem

摘要

Deadlock is avoided in a grid storage system having superior scalability. Provided is a storage subsystem (14) connected to a host computer (10) for receiving a write or read access from the host computer. This storage subsystem includes a plurality of modules (16) respectively having a storage resource (26), a switch (24) for connecting the plurality of modules, a controller (20, 22) for controlling the transfer of a packet based on the write or read access from the host computer to a target module among the plurality of modules via the switch, and a memory (21) storing a transfer rule of the packet. The controller controls the transfer of the packet based on the transfer rule.