Patent ID: 7246248

Claim:
A method for controlling a storage system, the storage system including a storage device configured to store data in a logic volume having a logically defined physical storage area and the storage system including an information processing device configured to transmit a data I/O request to the storage device and having a first power supply which activates a function for transmitting the data I/O request, wherein the storage device is configured to communicate with the information processing device, the storage device having a second power supply which activates a function for accepting the data I/O request which is transmitted from the information processing device, and the method comprising: transmitting from the storage device to the information processing device a power-on request for turning on the first power supply when the storage device is in a state in which the storage device can accept the data I/O request being transmitted from the information processing device; if the information processing device and the storage device are connected by a SAN, then configuring the information processing device to transmit a data access request of a block unit to the storage device; and if the information processing device and the storage device are connected by a LAN, then configuring the information processing device to communicate in TCP/IP protocol with the storage device.