Patent ID: 7447124

Claim:
A recording and/or reproduction apparatus for recording or reproducing data onto or from an optical disk having a first recording layer and a second recording layer on one side thereof, the second layer having a pre-formatted header, comprising: recording means for irradiating a laser beam upon the optical disk to record marks onto the first or second recording layer; light receiving means for receiving reflected light from the optical disk when the laser beam is irradiated upon the optical disk; data signal production means for producing a data signal based on the reflected light received by said light receiving means; and control means for controlling said recording means to record marks for a header and marks for data on the first recording layer before marks for data are recorded on the second recording layer which has marks for a header already formed thereon, the marks for the header including a segment mark, marks corresponding to a first address and marks corresponding to a second address, and said control means controls said recording means to record the dummy marks onto the first recording layer after recording the marks for the header.