Patent ID: 7707375

Claim:
A storage system, comprising: a first storage device that receives and stores at least one data set from a host; a second storage device that receives and stores the at least one data set transmitted from the first storage device, and in which remote copying of the data set stored in the first storage device to the second storage device can be executed, wherein each data set stored in the first storage device has a copy policy tag that defines a policy relating to the remote copying of the data set; a reconfiguration controller that selects whether or not to transmit the data set stored in the first storage device to the second storage device based on the copy policy tag of the each data set stored in the first storage device, wherein the copy policy tag of the each data set comprises an element that designates conditions for requiring remote copying of the data set, the reconfiguration controller determining whether or not the data set fulfills the conditions designated by the copy policy tag, and selectively transmitting to the second storage device the data set that fulfills the conditions, and wherein the conditions comprise an access counter set value, the reconfiguration controller detecting the access frequency of the each data set, and determining whether or not the conditions are fulfilled by comparing the detected access frequency with the set value designated by the copy policy tag of the data set.