Patent ID: 7366838

Claim:
A storage system comprising: a disk array system including plural storage devices that store data to memory areas; a storage device control unit that controls write or read of data to said plural storage devices; a channel control unit that receives a write request or a read request from a host machine; a shared memory which stores configuration information communicated by said channel control unit and said storage device control unit; a cache memory which temporarily stores data communicated between said channel control unit and said storage device control unit; a connection unit that is connected to said channel control unit, said storage device control unit, said shared memory and said cache memory; and a management terminal, which is connected to said channel control unit, said storage device control unit and said shared memory and which manages said disk array system, wherein said host machine is connected to said channel control unit in said disk array system via a first network, a management client that is connected to said management terminal in said disk array system via a second network that is different from said first network, wherein said shared memory in said disk array system has management information for managing operation authority for the configuration information which is used by both of said host machine and said management client, wherein said channel control unit checks said management information in said shared memory in response to an access request from said host machine or said management client and determines whether to give the operation authority for changing the configuration information to either said host machine or said management client based on the check of said management information, wherein said management information includes an identifier of an operator having the operation authority, acquisition time of the operation authority, and release scheduled time of the operation authority, wherein said channel control unit gives the operation authority with a time limit from said acquisition time to said release scheduled time to an operator who has said operation authority based on said identifier of the operator, said acquisition time, and said release scheduled time, wherein said management information further includes initial operation authority holding time, and wherein said channel control unit determines the time limit from said acquisition time to said release scheduled time based on said initial operation authority holding time.