| 摘要 |
An optical recording medium (1) provided with one or a plurality of recording layers (20,21,...) includes an adjustment data recording area ('pre-write area') for recording therein adjustment data used for adjusting focus or spherical aberration of laser light used for recording/reproduction, the adjustment data recording area being disposed at a predetermined position on each of the one or plurality of recording layers (20,21,...), and a determination information recording area for recording therein determination information indicating whether or not the adjustment data has been recorded in the adjustment data recording area in each of the one or plurality of recording layers.
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