Patent ID: 8285824

Claim:
A storage system comprising: a first storage apparatus connected to a host system, that stores data transmitted from the host system; and a second storage apparatus connected to the first storage apparatus, that stores backup data for the first storage apparatus, wherein the first storage apparatus includes: first logical configuration information for a first data storage area, an identification unit that identifies one or more requests for changing the first logical configuration information from among one or more requests transmitted from the host system, a first change unit that changes the first logical configuration information based on each of the one or more requests for changing the first logical configuration information identified by the identification unit, a transmission unit that transmits each of the one or more requests for changing the first logical configuration information to the second storage apparatus, a request queue with which the one or more requests for changing the first logical configuration information are managed, a request processing unit that processes the one or more requests for changing the first logical configuration information in an order of the requests in the request queue, and a synchronization unit that starts refusing the one or more requests for changing the first logical configuration information, transmits the first logical configuration information to the second storage apparatus, creates a replica of the data transmitted from the host system, and ceases refusing the one or more requests for changing the first logical configuration information; and the second storage apparatus includes: a second logical configuration information for a second data storage area, a second change unit that changes the second logical configuration information to be the same as for the first logical configuration information in the first storage apparatus, based on each of the one or more requests for changing the first logical configuration information transmitted from the transmission unit.