A master carrier for magnetic transfer is equipped with a substrate with a landgroove pattern of lands and grooves, and a magnetic layer formed on the landgroove pattern. The sensor assembly comprises an oscillating magnet member affixed at one end and a permanent magnet attached at an opposite free end at the end of a flexible member. The communication data that is received according to the type of protocol is sorted by the type of data, namely, into the control data packet and print data packet.