Patent ID: 8086733

Claim:
A computer system, comprising: a plurality of host computers; at least one storage system coupled to the host computers; and a management computer capable of accessing the host computers and the storage system; wherein: each of the host computers has a first processor for carrying out arithmetic operations and a first memory connected to the first processor, and the first memory stores programs for providing a service, the first processor is configured to: provide the services by executing the programs; and access, by using a data input/output request, a first type storage area as a command device provided by the storage system for changing a configuration of a second type storage area provided by the storage system and wherein further: the at least one storage system has a second processor for carrying out arithmetic operations, a second memory connected to the second processor, the first type storage area as the command device and the second type storage area for storing data requested to be inputted from the host computers, the second memory stores first management information for managing a host computer group of two or more of the host computers that provides a common type of service and is permitted to change the configuration of the second type storage area in the storage system by accessing the first type storage area as the command device, the second processor is configured to permit or deny the host computers to change the configuration of the second type storage area in the storage system based on the first management information after receiving the data input/output request, the management computer has a third processor for carrying out arithmetic operations and a third memory connected to the third processor, the third memory stores second management information for managing a relationship between each of the host computers, the second type storage area and the first type storage area as the command device, and third management information for managing a type of service provided by each of the host computers that is permitted to change the configuration of the second type storage area in the storage system; and the third processor is configured to: judge whether at least one of the host computers is permitted to change the configuration of the second type storage area based on whether there is correspondence between the second and the third management information; and set, when it is judged that the at least one of the host computers is permitted to change the configuration of the second type storage area, the host computer group in the first management information by using the at least one of the host computers.