| 摘要 |
<p>An optical disk (1) having a writable RAM area (10) and a nonrewritable read-in area (11), wherein the track pitch of the read-in area (11) is substantially equal to that of the RAM area (10), track A (2A) and track B (2B) where the polarity of the tacking error signal is different from that of track A (2A) are provided in the read-in area (11), and read-in data (3) is written in only track A (2A). The crosstalk of the read-in area (11) is greatly improved. The tracking control specifications of the RAM area (10) and the read-in area (11) are common to one another.</p> |
