Patent ID: 7916607

Claim:
An optical disc drive for reading user data from a recordable data storage medium, on which modulated property data, unique to the recordable data storage medium, was recorded and on which the user data to be used by a user is writable, the optical disc drive comprising: a type recognizing section for distinguishing the recordable data storage medium from a read-only data storage medium; and property data reading means for reading the property data, said property data reading means reading one of a second data format and a third data format in accordance with a result obtained by the type recognizing section, wherein the third data format uses a different modulation method from that of the second data format, wherein the read-only data storage medium has recorded thereon user data to be used by the user and property data, unique to the read-only data storage medium, in the first and the second data formats, respectively, and wherein the user data will be written on the recordable data storage medium in the same first data format as that of the read-only data storage medium and at least a portion of the property data was recorded on the recordable data storage medium in a third data format, which is different from the second data format.