Optical disc device and recording power determining method

摘要

The invention provides an optical disc device and a method of determining an optimal laser power for data recording by trial recording before recording actually user data even when there are fingerprints in the test track area for the trial recording. The BER (Byte Error Rate) is detected in each recorded sector. If the BER is less than a particular threshold value, the sector is taken as OK (good). Otherwise the sector is taken as NG (no good). While the peak power level is gradually changed or decreased from the power level at which half or more of the plural reproduced sectors are OK, a boundary peak power at which half or more of the sectors become NG is found. Based on the found boundary power, amount of the optimal peak power is determined.