Townsend and Townsend and Crew LLP
Data transfer and access control between disk array systems
A method for copying information from a first storage subsystem to a second storage subsystem is disclosed. The first and second storage subsystems are provided in a data storage system. The method comprises transmitting first data block from the first storage subsystem to the second storage subsystem, the first storage subsystem being associated with a first host computer and the second storage subsystem being associated with a second host computer; and transmitting first attribute information from the first storage subsystem to the second storage subsystem without intervention from the first host computer.
Hitachi, Ltd.
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Kiichiro Hiroshi Hideo Toshio
Urabe Ohno Tabuchi Nakano