RECORDING AND REPRODUCING DEVICE, METHOD THEREFOR, RECORDING MEDIUM AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To record data on a 2-layer recording and reproducing optical disk and reproduce the data. SOLUTION: To a single-side 2-layer optical disk in which a recording film L0 layer is unformatted and a recoding film layer L1 is formatted, the recording film L0 layer is formatted by a mark (step S1), and forming the marks corresponding to recorded data is begun at first for the recording L0 layer (step S2). After the recording film L0 layer is used up, the marks corresponding to the recorded data are formed in a recording film L1 layer (step S3).