Patent ID: 7937546

Claim:
A computer system, comprising: a first computer; a first storage system configured to store one or more first volumes; a second storage system configured to store one or more second volumes, of which at least one of the one or more second volumes have been paired with a corresponding one of said one or more first volumes, and wherein data copied from one of said first volumes is stored in the at least one corresponding paired second volume; and a management computer, coupled to the first computer, the first storage system, and the second storage system, configured to: store volume list information which identifies those of said one or more first volumes that have been accessed by an application program in said first computer, store pair information which identifies pair relationships between each of said one or more first volumes in the first storage system with a corresponding one of said one or more second volumes in the second storage system, compare the volume list information and the pair information to identify those of said one or more first volumes that have been accessed by the application program in said first computer with those of said one or more first volumes that have been paired to a corresponding one of said one or more second volumes for storing copied data, and send to the first storage system an instruction to manage one of said one or more second volumes in the second storage system, wherein, when the comparison indicates that one of said one or more first volumes accessed by the application program in said first computer has not been paired with one of said one or more second volumes, the instruction includes correlating said one or said one or more first volumes and one of said one or more second volumes, and wherein, when the comparison indicates that one of said one or more first volumes paired with one of said one or more second volumes is not accessed by the application program in said first computer, the instruction includes deleting the pairing.