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 1142 of a channel control unit 11 and an MP 122 of a processor unit 12 that sets a transfer parameter in the first DMA 1142, while CKD format data 1400 is transferred from a cache memory 14 to a memory 113 of the channel control unit 11, the MP 122 acquires a C field 1411 from the cache memory 14 and sets a transfer parameter in the first DMA 1142 on the basis of the acquired C field 1411, the transfer parameter having attached thereto the C field 1411 and being used for transferring a K field 1412 from the cache memory 14 to the memory 113. The first DMA 1142 retrieves the C field 1411 attached to the transfer parameter, stores the C field 1411 in the memory 113, and transfers the K field from the cache memory 14 to the memory 113 according to the transfer parameter.