Storage system having a channel control function using a plurality of processors

A storage system connected to a host computer via a channel, comprising:na local router including a processor number information and a transfer list index/processor number information;at least one protocol processor connected to the channel for transmitting and receiving a frame to and from the host computer, via the local router;at least one cache memory to store write data or read data temporarily;another processor:wherein the frame 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,nthe 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.

A storage system, coupled to a host computer, comprising:na channel adaptor comprising:na local router including a processor number information and a transfer list index/processor number information; anda protocol processor transmitting and receiving a data between the host computer and the local router; andat least one cache memory to store write data or read data temporarily;a plurality of storage nodes including a processor and a disk drive;wherein each of storage nodes provides the disk drive to the host computer as a logical unit,another processor;wherein a frame of the data includes a first frame which has logical unit number identifying the logical unit to write data and a second frame which has write data;wherein the processor number information includes the 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 routerndetermines 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;in case that a transmission destination address is a message FIFO,nextracts an index number of the data from the data,determines the processor number of the data by referring to the list index number of the data and the transfer list index/processor number information, andtransfers the data to the processor of the processor number.

A data transfer method for a storage system coupled to a host computer which includes:na channel adaptor including:na local router including a processor number information and a transfer list index/processor number information; anda protocol processor transmitting and receiving a data between the host computer and the local router; andat least one cache memory to store write data or read data temporarily;a plurality of storage nodes including a processor and a disk drive;wherein each of storage nodes provides the disk drive to the host computer as a logical unit,another processor;wherein a frame of the data includes a first frame which has logical unit number identifying the logical unit to write data and a second frame which has write data;wherein the processor number information includes the logical number of each logical unit and a processor number of each processor, andwherein 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 data transfer method for the storage system comprising:ndetermining a processor number to receive the first frame based on the logical unit number of the first frame and the processor number information,transferring 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;in case that a transmission destination address is a message FIFO,nextracting the index number of the data from the data;determining the processor number of the data by referring to the list index number of the data and the transfer list index/processor number information; andtransferring the data to the processor of the processor number.