Patent ID: 7165163

Claim:
A storage system, comprising: a virtualization device coupled to an information processing device and having a first controller and at least one virtual volume; said first controller receiving a data input request sent from said information processing device to said at least one virtual volume and changing a first Logical Unit Number (LUN) included in said data input request into a second LUN of at least one first logical volume in a storage device based on a relationship between said at least one virtual volume and said at least one first logical volume and relaying a changed data input request including said second LUN to said at least one first logical volume; said storage device coupled to said- virtualization device and having a second controller and a plurality of disk drives, said disk drives being related to said at least one first logical volume; and said second controller receiving said changed data input request including said second LUN from said virtualization device and storing data of said changed data input request including said second LUN in said disk drives; wherein said first controller receives a pair control command sent from said information processing device to said at least one virtual volume and changes said first LUN included in said pair control command into said second LUN based on said relationship and relays a pair control command including said second LUN to said at least one first logical volume; and wherein said second controller receives said pair control command including said second LUN from said virtualization device and controlling a pair status between said at least one first logical volume and a second logical volume in response to said pair control command including said second LUN.