Patent ID: 8166202

Claim:
A computer comprising: a network interface for communicating via a communication network; a storage resource; and a processor, which is connected to the network interface and to the storage resource, wherein a plurality of host computers are connected to the communication network, a plurality of storage systems configure one or more storage cascades, a single storage cascade is configured from two or more storage systems connected in series, two or more local storages and one or more remote storages are included in the plurality of storage systems, the local storage is a storage system that is connected to at least one host computer, and the remote storage is a storage system that is not connected to any of the host computers, and wherein the processor executes a route check process and a scan process, (A) the route check process comprising: (a1) a process for acquiring, via the network interface, host/storage connection information related to a host path, which is the path connecting the host computer to the local storage; (a2) a process for acquiring, via the network interface, storage/storage connection information related to a storage path, which is the path connecting a storage system to a storage system; and (a3) a process for creating route management information based on the host/storage connection information acquired in the (a1) and the storage/storage connection information acquired in the (a2), and storing the created route management information in the storage resource, the route management information is information related to a plurality of routes, a single route is configured from two or more nodes connected in series and an inter-node path, a start node of these two or more nodes is any of the host computers, and the other node of these two or more nodes is any of the storage systems, (B) the scan process comprising: (b1) a process for specifying, from the route management information, a plurality of routes having a scan-targeted storage system of the plurality of storage systems as an end node; and (b2) a process for selecting, based on the route management information, the host computer, which is the start node of an optimum route from among the plurality of routes, as the host computer for executing a remote scan of acquiring information related to a scan-targeted logical volume from a scan-targeted remote storage in a case where it is found in the process (b1) that the scan-targeted storage system is any of the remote storages.