Patent ID: 7430637

Claim:
A storage system which can be communicably connected with both a source business server issuing access requests and another storage system having a copy destination storage device, the storage system comprising: a controller; one or more memories including a cache memory; a side-file being a storage area prepared in at least one of one or more of the memories; and a copy source storage device; wherein each time the storage system receives write data and a write request from the business server, the controller executes the processing (1) through (3) of: (1) writing the received write data to the cache memory, (2) reading the write data from the cache memory, and writing the write data thus read to the copy source storage device, and (3) writing the write data written to the cache memory and additional information to the side-file, the additional information including information for notifying the another storage system of a sequence in which the write data was written to the copy source storage device; wherein the controller sends a plurality of write data accumulated in the side-file to the another storage system at a certain timing, and thus the plurality of write data stored in the copy source storage device is written to the copy destination storage device; wherein the controller checks a condition of use of the side file and notifies a job control program running on the business server of the checked condition of use, the job control program being configured to control operation of a plurality of business application programs running on the business server; wherein coping information for each business application program in the plurality of business application programs is stored in a storage resource of the business server, the coping information identifying processing to be performed for said each business application program under a particular condition of use; and wherein the job control program acquires the checked condition of use and controls each business application program in the plurality of business application programs based on the coping information and the checked condition of use.