Data transfer system and data transfer method

An efficient transfer of data including a plurality of data sections is achieved. In a data transfer system including a first DMA of a channel control unit and an MP of a processor unit that sets a transfer parameter in the first DMA , while CKD format data is transferred from a cache memory to a memory of the channel control unit , the MP acquires a C field from the cache memory and sets a transfer parameter in the first DMA on the basis of the acquired C field , the transfer parameter having attached thereto the C field and being used for transferring a K field from the cache memory to the memory . The first DMA retrieves the C field attached to the transfer parameter, stores the C field in the memory , and transfers the K field from the cache memory to the memory according to the transfer parameter.