Patent ID: 6760824
Filing Date: 2004-07-06
Classification: G06F,Y10S

Abstract:
A storage system in which a disk array device of a local side transmits a write data received from an upper device into a disk array device of a remote side asynchronously,each of said disk array device of the local side and said disk array device of the remote side comprising: a host interface control unit which receives a command from the upper device; a cache control unit which temporarily stores data received from said upper device; and a drive control unit which controls writing of the data of said cache controller into physical disks of its own device; said disk array device of the local side comprising a memory which stores information indicative of how data transfers to the disk array device of the remote side have progressed; said host interface control unit in said disk array device of the local side monitoring said memory in response to reception of a synchronization command from said upper device, and transmitting a response indicative of data transfer completion to said upper device, in response to transfer completion of data which has not yet been transferred to said disk array device of the remote side upon reception of said synchronization command.