| 摘要 |
PROBLEM TO BE SOLVED: To perform data transfer between a central processing unit and a master disc control device and between the master disc control device and a remote disc control device in parallel in remote copy processing, and to realize reception from the central processing unit and transmission to the remote disc control device at the same port. SOLUTION: By utilizing bidirectional data transfer and multiprocessing which are characteristics of a fiber channel, and by using a header conversion circuit constituted from a header conversion buffer and a header conversion control part, a frame accepted from the central processing unit is stored once in the header conversion buffer in a master side disc device, and a header part of the frame is converted for remote side disc device transmission and transmitted. Hereby, the data transfer between the central processing unit and the master side disc device and between the master side disc device and the remote side disc device can be performed in parallel, to thereby improve processing performance. In addition, the reception from the central processing unit and the transmission to the remote side disc device can be realized at the same port.
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