Patent ID: 7380079

Claim:
A storage system, comprising: a first storage device coupled to at least one information processing device and having a first controller and a plurality of first disk drives, at least one of said first disk drives being related to a first logical volume as a first primary logical volume; said first controller receiving data targeted to said first logical volume and storing said data targeted to said first logical volume into said at least one of said first disk drives and transferring data related to said data targeted to said first logical volume to a second logical volume in a second storage device by a first remote copy process; said second storage device coupled to said first storage device and having a second controller and a plurality of second disk drives, at least one of said second disk drives being related to said second logical volume as a secondary logical volume of said first logical volume; said second controller receiving data transferred from said first storage device and storing said data transferred from said first storage device into said at least one of said second disk drives; a third storage device coupled to said information processing device and having a third controller and a plurality of third disk drives, at least one of said third disk drives being related to a third logical volume as a second primary logical volume; and said third controller receiving data targeted to said third logical volume and storing data into said at least one of said third disk drives and transferring data related to said data targeted to said third logical volume by a second remote copy process; wherein said information processing device displays information of said first and second storage devices among said first, second and third storage devices if a parameter of said first remote copy process of said first and second storage devices satisfies a condition relative to a predetermined threshold.