| 摘要 |
The present invention provides a recording medium. First data is recorded in the medium, in the form of a track consisting of a plurality of bits. Second data is recorded in the form of a plurality of bits that are displaced in the direction at right angles to the track. The content data representing the contents of the first data is recorded in the recording medium, too. The content data includes identification data that indicates whether the second data is recorded in the recording medium.
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