Patent ID: 8677090

Claim:
A first storage apparatus, which is coupled to a second storage apparatus so as to be capable of two-way communications, wherein the first storage apparatus has a first controller and a first logical volume, which is controlled by the first controller, and wherein the first controller: in a case where the second storage apparatus has a second logical volume for forming a first remote copy pair with the first logical volume when a first copy volume is created from the first logical volume, issues an instruction to a second controller of the second storage apparatus to create a second copy volume from the second logical volume that forms a second remote copy pair with the first copy volume; checks that the second copy volume has been created, and forms a second remote copy pair of the first copy volume and the second copy volume; determines whether or not the second storage apparatus has the second logical volume forming a remote copy pair with the first logical volume by using remote copy information that manages the remote copy; and in a case where the determination is made that the second storage apparatus has the second logical volume, issues an instruction to the second controller to create from the second logical volume a second copy volume forming a second remote copy pair with the first copy volume, and wherein, in a state in which the storage content of the first logical volume matches with the storage content of the second logical volume, the first copy volume is created from the first logical volume, and also the second copy volume is created from the second logical volume, and in accordance with this, the storage content of the first copy volume matches with the storage content of the second copy volume at a point in time when the second remote copy pair is formed.