Patent ID: 7221630

Claim:
An information recording and reproduction method for an information recording medium including a data area divided into a plurality of segmented areas in a radial direction of the information recording medium, the method comprising the steps of: (a) indicating a segmented area which is a target of recording and reproduction among the plurality of segmented areas; (b) obtaining a recording and reproduction condition corresponding to the indicated segmented area; (c) performing recording and reproduction based on the obtained recording and reproduction condition; and (d) recording the recording and reproduction condition on at least one of a lead-in area and a lead-out area of the information recording medium, wherein the step (b) includes the step of acquiring the recording and reproduction condition by adjustment processing and wherein the information recording medium further includes a drive information area having drive information including the recording and reproduction condition recorded therein, and the step (b) includes the step of reading the recording and reproduction condition recorded in the drive information area.