An image password lock system by tracing the position information of the organism or article feature is provided. The delivery of the neural stimulation pulses are synchronized to that timing reference event. An end of the sleeve is securely mounted around an end of the spindle to turn therewith. The controller is configured to parse a write command corresponding to a special block, to select at least one accessible sector according to a status information of the special block and to program the write command to the special block, wherein the status information indicates at least one non-accessible sector in the special block.