Bridge device, storage device and program

A bridge device for bridging data transfer between a first controller accessing a data storage and a second controller, comprising:

• a reception unit configured to receive first transfer information specifying a write address of the data storage,
• a transfer information storage to store the first transfer information therein,
• a first processing unit configured to output, to the second controller, a first command to instruct writing data into a data buffer, based on the first transfer information read from the transfer information storage,
• the data buffer configured to receive and retain the data output from the second controller, and
• a second processing unit configured to output, to the first controller, a second command to instruct writing the data retained in the data buffer at the write address of the data storage.

A non-transitory computer readable medium having instructions stored therein which when executed by a processor, cause the processor to perform processing of steps comprising:

• receiving first transfer information specifying a read address of a data storage from an external device;
• storing the first transfer information in a transfer information storage;
• generating a first command to instruct reading data from the read address of the data storage based on the first transfer information read from the transfer information storage, and outputting the first command to a first controller accessing the data storage;
• retaining the data read by the first controller from the read address of the data storage, in a data buffer;
• and
• generating a second command to instruct reading the data retained in the data buffer, and outputting the second command to a second controller.

A non-transitory computer readable medium having instructions stored therein which when executed by a processor causes the processor to perform processing steps for bridging data transfer between a first controller accessing a data storage and a second controller, comprising:

• receiving first transfer information specifying a write address of a data storage from an external device,
• storing the first transfer information in a transfer information storage,
• outputting, to the second controller, a first command to instruct writing data into a data buffer, based on the first transfer information read from the transfer information storage,
• receiving and retaining the data output from the second controller, in the data buffer and
• outputting, to a first controller, a second command to instruct writing the data retained in the data buffer at the write address of the data storage.