Patent ID: 7068581

Claim:
An optical information recording medium having addresses t for respective sectors, on which information is recorded through application of light thereto, comprising: an area A 1 starting from an address t 1 to which access is made by a recording apparatus at a time of recording operation of the recording apparatus; an area A 2 starting from an address t 2 to which access is made by the recording apparatus either at a time of recording operation or at a time of reproducing operation of the recording apparatus; and an area A 3 starting from an address t 3 to which access is made either by the recording apparatus or by a reproducing apparatus either at a time of recording or at a time of reproducing of any one of these apparatuses, and wherein: the addresses t are set consecutively with respect to a physical arrangement of the sectors in each of said areas A 2 and A 3 , and said area A 1 has at least one inconsecutive part at which the addresses t are not consecutive with respect to the physical arrangement of the sectors; the inconsecutive part has a range of A 1 ′ in the direction of the physical arrangement of the sectors between addresses t 1 ′ and t 2 ′, the addresses t from the address t 1 ′ to the address t 2 ′ are not consecutive, where t 1 <t 1 ′, and t 2 ′<t 2 , and arbitrary addresses tx can be set in the range A 1 ′; and a degree of modulation obtained, when recording of the longest record mark is made thereon at a recording speed of V=0.5Vmin, wherein Vmin is the lowest recording speed guaranteed for the optical information recording medium, is lower than the lowest standard value of the optical information recording medium.