Patent ID: 7079462

Claim:
An optical disk data erasing method comprising: a first jumper switch setting operation of setting a first jumper switch to ON or OFF; a setting identification operation of identifying the setting of the first jumper switch; a judgement operation of making a judgement as to whether or not a loaded optical disk is a write-once optical disk; an erasing operation of overwriting the write-once optical disk by irradiating the write-once optical disk with a laser beam having a same recording power as that at recording, according to the setting of the first jumper switch, thereby erasing data recorded on the write-once optical disk; and an ejection operation of automatically ejecting the optical disk after the data erasing process, wherein when the first jumper switch is set to ON, said erasing operation starts the data erasing process, and when the first jumper switch is set to OFF or when said judgement operation judges that the loaded optical disk is not a write-once optical disk, said ejection operation automatically ejects the optical disk, and a displaying operation displays that the data erasing process has not been executed on the optical disk.