Patent ID: 8400894

Claim:
An optical disc drive for writing data on a multilayer optical disc that has N information storage layers (where N is an integer that is equal to or greater than two), the drive comprising: an optical pickup for optically accessing the multilayer optical disc; a memory that stores correction coefficient information with respect to each of the multiple information storage layers of each of multiple types of multilayer optical discs that are compatible with the optical disc drive, wherein the correction coefficient information provides a specific value of the correction coefficient for each said type of multilayer optical disc; and a write processing section for determining a provisional initial optical recording power by tentatively writing data on a test write area of one of the information storage layers of the multilayer optical disc loaded, choosing an appropriate correction coefficient from the memory according to a level of a target information storage layer, on which data is going to be written, and then correcting the provisional initial optical recording power based on the correction coefficient chosen, thereby determining an initial optical recording power, wherein the level of the target information storage layer is a position of the target information storage layer among the N information storage layers.