| 摘要 |
A record medium (1) is provided with: a main body; a groove track (1G) formed on the main body, as one track for recording information onto which a light beam for recording and/or reproducing the information is irradiated; and a land track (1L) formed on the main body, which is adjacent to the groove track, as another track for recording the information onto which the light beam for recording and/or reproducing the information is irradiated. A judgment wobble (W), which has a judgment pattern to judge whether the light beam is irradiated onto the groove track or the land track, is formed on only one side wall of the groove track.
|
