METHOD FOR ERASING RECORDED DATA ON OPTICAL DISC

摘要

A method of erasing data of an optical disk is provided to speed up the data erasing operation of the optical disk, and to increase the erasing reliability by forming a beam spot on tracks of the optical disk and overwriting null data with a zigzag shape on a data area of the optical disk. A large sized beam spot is formed over a plurality of tracks of an optical disk by controlling the focus lens of the optical pickup into a predetermined defocus state when a data erasing mode is set. The null data is overwritten in a zigzag shape on a data area of the optical disk by using the large sized beam spot. The data erasing mode of the optical disk which is one time recordable is set by an erasing button mounted on the optical disk drive.