Abstract: According to one embodiment, a data transfer apparatus includes a first device, a transfer unit which controls data transfer between a second device to be connected to the first device and to be controlled thereby, and a control unit which discards data to be transmitted from the second device when the first device decides to stop reception of the data to be transmitted from the second device in a status in which data transfer from the second device to the first device is performed.

Abstract: According to one embodiment, an I/O controller transfers data between a memory and an I/O device by request of a processor. The I/O controller includes a storage unit to which write access is gained by the processor and which stores descriptor chain information written by the processor, the descriptor chain information including a plurality of descriptors each describing a content of data transfer to be executed, and a data transfer control unit which processes the descriptors in sequence and executes a series of data transfers by direct memory access to transfer data from the memory to the I/O device.