| 摘要 |
An optical disk device for writing onto an optical disk to allow invisible data to be written thereon. The optical disk device has an address detection section for detecting the last address of invisible data based on the last address recorded in an address information area and the last address of a user data area of the optical disk when an optical disk is replaced with another optical disk, an instruction data calculation section for finding address instruction data indicating the top address of an empty area from the last address detected by the address detection section, and a storage section for storing the address instruction data found by the instruction data calculation section. When writing is executed, it is executed starting at the top address corresponding to the address instruction data stored in the storage section.
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