Medium judgment method, storage medium, medium judgment program, and optical disk drive using the medium judgment method

摘要

A medium judgment method determines authorization of a rewritable storage medium of interest having a read-only area and a rewritable area for use in an optical disk drive. In the medium judgment method, a specific information of the medium is acquired from an information reproduction area of the read-only area of the medium. It is determined whether contents of the medium are authorized based on the acquired specific information. Running of a starting process of the optical disk drive with the medium is permitted when the authorization of the medium is determined as being correct. Running of the starting process of the optical disk drive with the medium is inhibited when the authorization of the medium is determined as being incorrect.