Remote copy system for setting request interconnect bit in each adapter within storage controller and initiating request connect frame in response to the setting bit

摘要: A remote copy system incorporates dynamically modifiable ports on the storage controllers such that those can operate either as a control unit link-level facility or channel facility. When configured facility, primary controller appear host processor to secondary controller. The thereafter initiate multiple request connects (RQC) concurrently for servicing single I/O request. In this manner, first available path be selected and throughput thus improved since RQCs so not need sent serially from looking an path.