| 摘要 |
<p>PCAs (Power Calibration Areas), test writing areas for regulating a laser beam recording power are respectively provided on the inner and outer periphery sides of an optical disk (1) across a program area so as to enable data to be recorded with an optimum recording power in either inner or outer peripheral recording position on the optical disk (1). When data is to be recorded in a program area on the optical disk (1), one PCA closer to a data recording position is selected, test-writing is performed therein, and a laser beam writing power is set based on the test-written data to thereby enable data recording with an optimum laser power.</p> |
