Patent ID: 8348377

Claim:
A storage device being electrically connectable to a host circuit, comprising: a non-volatile data storage unit; a data receiving unit which receives data including first data which are to be written in the data storage unit and second data which are generated based on the first data from the host circuit; a determination unit which determines consistency of the data received by the data receiving unit; a data transmitting unit which transmits a result of the determination to the host circuit, wherein the determination unit determines whether or not the first and second data are consistent with each other, and wherein in the case where an affirmative determination result is obtained by the determination unit, (1) in the case where writing data in the data storage unit is completed, the data transmitting unit transmits the affirmative determination result to the host circuit, and (2) in the case where the writing data in the data storage unit is not completed, the data transmitting unit does not transmit the affirmative determination result to the host circuit.