Patent ID: 7493443

Claim:
A storage system comprising: a host system for making a data read/write request; and a storage controller for storing data from the host system; wherein the storage controller includes: a channel adapter that is a communication interface with the host system; and shared memory connected to the channel adapter; wherein the shared memory includes a shared storage unit for storing control information for controlling the storage controller; and wherein the channel adapter includes: a first storage unit for storing, as one or more sets of first control information, either the control information that should be stored in the event the storage controller stops, or the control information that exceeds the capacity of the shared storage unit and cannot be stored in the shared storage unit; a first search unit for searching for necessary first control information in the one or more sets of first control information stored in the first storage unit; and a processor for executing corresponding control processing based on the first control information found by the first search unit.