Patent ID: 6940795

Claim:
An information recording and reproduction method for an information recording medium including a data recording area for recording data, a first drive information area for recording first drive information, and a second drive information area for recording second drive information, wherein: the first drive information and the second drive information each include a plurality of recording and reproduction conditions, the method comprising the steps of: (a) determining whether or not the first drive information can be read from the first drive information area; (b) determining whether or not the second drive information can be read from the second drive information area; (c) determining whether or not the plurality of recording and reproduction conditions included in the second drive information include a recording and reproduction condition usable by the information recording and reproduction apparatus having the information recording medium mounted thereon; and (d) when the first drive information cannot be read, the second drive information can be read, and the second drive information does not include the usable recording and reproduction condition, adjusting a new recording and reproduction condition usable by the information recording and reproduction apparatus having the information recording medium mounted thereon, and using the new recording and reproduction condition and the second drive information to update the first drive information and the second drive information.