Shared/exclusive control scheme among sites including storage device system shared by plural high-rank apparatuses, and computer system equipped with the same control scheme

A computer system, comprising:

• a plurality of storage device systems including one or more remote-copy purpose logical volumes, and
• one or more high-rank apparatuses connected to each of said storage device systems, said plurality of storage device systems being connected to each other via a network,
• wherein said plural remote-copy purpose logical volumes configure remote-copy groups,
• wherein said plural remote-copy purpose logical volumes configuring said remote-copy groups being controlled such that said logical volumes have same contents among said plural storage device systems,
• shared/exclusive control using a shared logical volume which is unconscious of said remote copy being performed using said high-rank apparatuses in an environment where said remote copy is used, said high-rank apparatuses being connected to said logical volumes within each of said remote-copy groups.