An information recording apparatus and method can prevent an information recording medium having a plurality of recording layers from being incompatible with a reproduction-only information recording medium due to an unrecorded area, which is produced by completion of recording in a middle of a data area of the recording layer. The apparatus comprises time stamping means for time stamping received information packets in accordance with a time stamping clock reference, writing means for recording the information packets in accordance with a write clock reference and reading means for reproducing the information packets in accordance with a read clock reference. The air conditioner condenser includes a condensing portion and a sub-cool portion. The position control loop, which is at a higher level than the rotation speed control loop, is in the form of a PI regulator in order that no permanent position errors can occur. The opening surfaces of the cavities are covered by a panel having inputoutput terminals, an antenna connection terminal and inputoutput loops and by a panel having coupling loops.