An information storage apparatus that includes a memory unit, a first controller that reads data from the memory unit, and a second controller included in the memory unit that reads a first identification and outputs the first identification in response to an external instruction, wherein the first identification may only be read by the second controller. The data recovery subsystem includes a first mixer to mix a Radio Frequency signal with a first Local Oscillator signal to produce an Intermediate Frequency signal representative of the magnetic field signal. A number of imaging media may be used according to an intended application for the imaging device, and an imaging medium may have wavelengths above, below, or within the visible light spectrum. In certain embodiments the second component is configured to slidably engage the first component.