Patent ID: 7873783

Claim:
A computer comprising: a first-path-redundancy acquisition unit for acquiring first-path-redundancy information, which is information related to the redundancy of a first path linking a first storage volume of a first storage system to a first host volume of a first host; a redundancy-configuration-destination specification unit for referencing host volume mapping management information, which is information denoting which first host volume of which first host is mapped to which second host volume of which second host, and for specifying the second host volume mapped to the first host volume connected to the redundancy-configured first path; a second-path-redundancy decision unit for deciding the redundancy of a second path linking the specified second host volume to a second storage volume of a second storage system, based on the acquired first-path-redundancy information; and an output unit for outputting second-path-redundancy information, which is information related to the redundancy of the decided second path, so that the decided second-path redundancy is configured in the second host having the specified second host volume, wherein the first-path redundancy is a value based on the number of active first paths, which are active-state first paths of the plurality of first paths connected to the same first host volume and the same first storage volume; the second-path redundancy is a value based on the number of active second paths, which are active-state second paths of the plurality of second paths connected to the same second host volume and the same second storage volume; the first storage system and one or more first hosts configure a first computer system; the first storage volume is a logical volume in the first storage system; the first host volume is a logical device mapped to the first storage volume recognized by the first host; the second storage system and one or more second hosts configure a second computer system; the second storage volume is a logical volume, which is in the second storage system, and which stores data that is stored in the first storage volume; and the second host volume is a logical device mapped to the second storage volume recognized by the second host.