Patent ID: 7447130
Filing Date: 2008-11-04
Classification: G11B

Abstract:
1. An optical disc having at least two layers on which information can be recorded by recording light, one layer being a first recording layer, another layer being a second recording layer disposed behind the first recording layer as viewed by the recording light, wherein: the first recording layer and the second recording layer have respective power adjustment areas that are used to adjust the power of the recording light to an optimal recording power before recording information on each recording layer; and the first recording layer has, as a prewrite area in a position corresponding to the power adjustment area in the second layer, an area equal to the power adjustment area in the second recording layer plus a restricted area adjacent the power adjustment area in the second recording layer, no information being recorded in the restricted area until recording in the corresponding area in the first recording layer is completed, and the first recording layer or the second recording layer has recording management area in which is recorded information used when information is recorded on the optical disc, address information of a final recorded end of the prewrite area being recorded in the recording management area.