| 摘要 |
A device enabled to prevent an increase in a starting time period even in the presence of both disks having a recording groove track and a recording land track. An optical disk (101) is of the type for recording in the groove track, and an optical disk (107) is of the type for recording in the land track. These individual optical disks (101, 107) are provided with control data areas (102, 108) and data recording areas (103, 109) for recording user data. In both the optical disks (101, 107), the control data areas (102, 108) have codes recorded therein for indicating which track is to be tracking-servoed.
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