Storage system control method, storage system, and storage apparatus

A storage system comprising:

• a first disk array system, in a primary site, coupled to a first host computer, comprising:
• a plurality of first disk drives,
• a plurality of first volumes configured by said first disk drives, and
• a first controller storing data sent from said first host computer in said first volumes and transferring data related to said first volumes with a remote copy procedure;
• and
• a second disk array system, in a remote site, coupled to said first disk array system and a second host computer, comprising:
• a plurality of second disk drives,
• a second plurality of volumes configured by said second disk drives, and
• a second controller receiving said data related to said first volumes with said remote copy procedure and storing said received data in said second volumes,
• wherein each of said second volumes is related to a first Logical Unit Number (LUN), which is used to access said second volume by said second host computer, and a second LUN, which is used for initiating said remote copy procedure.

A disk array system for use in a storage system which includes a first disk array system, in a primary site, coupled to a first host computer, and a second disk array system, in a remote site, coupled to said first disk array system and a second host computer, said disk array system comprising:

• a plurality of disk drives;
• a volume configured by some of said disk drives;
• and
• a controller for controlling said disk array system,
• wherein if said disk array system is said first disk array system, then said controller stores data sent from said first host computer in said volume and transfers copy data of said data sent from said first host computer with a remote copy procedure;
• wherein if said disk array system is said second disk array system, then said controller receives said copy data from said first disk array system with said remote copy procedure and stores said copy data in said volume, and
• wherein if said disk array system is said second disk array system, then said volume is related to a first Logical Unit Number (LUN), which is used to access said volume by said second host computer, and a second LUN, which is used for transferring said copy data from said first disk array system to said volume with said remote copy procedure.

A disk array system for use in a storage system which includes a first disk array system, in primary site, coupled to a first host computer, and a second disk array system, in a remote site, coupled to said first disk array system and a second host computer, said disk array system comprising:

• a plurality of disk drives;
• a plurality of volumes configured by said disk drives;
• and
• a controller for controlling said disk array system,
• wherein if said disk array system is said first disk array system, then said controller stores data sent from said first host computer in said volumes and transfers data related to said volumes with a remote copy procedure,
• wherein if said disk array system is said second disk array system, then said controller receives said data related to said volumes with said remote copy procedure and stores said received data in said volumes, and
• wherein if said disk array system is said second disk array system, then said each of said volumes is related to a first Logical Unit Number (LUN), which is used to access said volumes by said second host computer, and a second LUN, which is used for initiating said remote copy procedure.