1. In a system including a management server, a plurality of processor devices, and a plurality of storage devices, the processor devices and the storage devices being coupled to the management server via a network, a method for the management server to establish a clustering system comprising: storing processor device information relating to each of the processor devices; receiving a command from a user interface for establishing a clustering system, the command having information for identifying a primary processor device which is configured to be a part of a primary computer resource with a primary storage device; and specifying at least one candidate of secondary processor devices corresponding to the primary processor device and at least one candidate of secondary storage devices corresponding to the primary storage device based on the processor device information, the at least one candidate of secondary processor devices and the at least one candidate of secondary storage devices being configured to be at least one secondary computer resource for the primary computer resource, wherein the processor device information includes LUN binding information indicating logical connections between the processor devices where application programs are executed and the storage devices utilized by the application programs.