Storage device and system for providing communications buffer reservation function

摘要

A storage device ( 1 ) communicating with a host computer and other storage devices through a network is characterized in that the storage device ( 1 ) secures memory buffers for temporarily storing data in a remote copy operation carried out between the storage devices. A network memory ( 100 ) in the storage device ( 1 ) includes an available buffer comprising a plurality of memory buffers and an in-use buffer also comprising a plurality of memory buffers. A buffer control unit ( 215 ) secures memory buffers of the available buffer as a reserved buffer having a reserved-buffer size specified in a buffer reservation request made by a storage management device ( 8 ) in response to the request. The buffer control unit ( 215 ) then allocates the memory buffers of the reserved buffer as the in-use buffer in response to a request received from the storage management device ( 8 ) to start a remote copy operation.