Patent ID: 8423677

Claim:
A storage system connected to a host computer via a channel, comprising: a local router including a processor number information and a transfer list index/processor number information; at least one protocol processor for transmitting and receiving a data between the host computer and the local router; at least one cache memory to store write data or read data temporarily; another processor: wherein a frame of the data includes a first frame which has a logical unit number identifying the logical unit to write data and a second frame which has write data; wherein the processor number information includes a logical unit number of each logical unit and a processor number of each processor, wherein the transfer list index/processor number information includes a list index number and a processor number, in a write request from the host computer, the local router: determines a processor number to receive the first frame based on the logical unit number of the first frame and the processor number information, transfers the received first frame to the another processor corresponding to the determined processor number; the another processor which receives the transferred first frame, secures a storage area in the cache memory to store the write data, and creates information of indicating an address of the secured storage area as created information; the protocol processor acquires the created information and stores the write data in the second frame to the secured storage area, based on the created information.