A management computer configured to access a first data storage apparatus, a second data storage apparatus, a host computer that is connected to the first data storage apparatus via a network,
- the first data storage apparatus including structural elements:
- a first disk drive, a first interface having a first port, a first memory stored with a virtualized data volume configuration table which indicates a connection relationship of structural elements of the at least one first data storage apparatus, a virtualized data volume into which data required to be written by one of the at least one host computer via sending a write request,
- a first transmission path is routed through the first port and is allocated between the host computer and the virtualized data volume, and a second transmission path is routed through the first port and the second port and is allocated between the virtualized data volume and a logical data volume,
- upon receiving the write request addressed to the virtualized data volume, the first data storage apparatus transfers data required to be written in the virtualized data volume through the first and second transmission paths to the second data storage apparatus, and without being written in the virtualized data volume,
- the second data storage apparatus including structural elements:
- a plurality of second disk drives at least one of which stores data which is required to be written by the at least one host computer, and a second interface having a second port, a second memory stored with a logical data volume configuration table which indicates a connection relationship of the structural elements of the at least one second data storage apparatus, a RAID group configured by the second disk drives, and the logical data volume configured on said one of the second disk drives to execute therein the write request addressed to the virtualized data volume of the first data storage apparatus from the host computer, and
- wherein the management computer includes structural elements:
- a third interface that is connected externally;
- a third processor that is connected to the third interface;
- and a third memory that is connected to the third processor,
- the third processor acquires at least one of the virtualized data volume configuration table that is stored in the first data storage apparatus and the logical data volume configuration table that is stored in the second data storage;
- the third processor specifies the virtualized data volume, the logical data volume, the second disk drive, at least one of the ports of the first and second interfaces, and the RAID group, which are linked into a transmission path of the data required to be written into said at least one virtualized data volume by the host computer, from the structural elements of the first data storage apparatus and the second data storage apparatus on the basis of at least one of the virtualized data volume configuration table and the logical data volume configuration table;
- the third processor acquires performance data of the specified structural elements;
- and
- the third processor outputs the acquired performance data.