REMOTE COPY SYSTEM

摘要

When performing asynchronous remote copying, whether or not a disaster has occurred at a main site is judged at a remote site; and if the disaster has occurred, recovery processing is immediately started at the remote site. When asynchronous remote copying is performed between a controller 18 and a controller 22, the controller 18 transfers remote copy target data in a storage apparatus 20 and command information via a remote copy channel 94 to the controller 22; and after receiving the remote copy target data, the controller 22 stores the remote copy target data in a storage apparatus 24; and if the controller 22 fails to receive the command information within a set time period, the controller 22 judges that a disaster has occurred, and then outputs the judgment result to a backup center server 32; and the backup center server 32 executes recovery processing based on data in the storage apparatus 24 when the disaster has occurred.