Optical recording apparatus for recording addresses and having a non-consecutive part in which addresses may or may not be set

An optical information recording medium having addresses t for respective sectors, on which information is recorded through application of light thereto, comprising:

• an area A1 starting from an address t1 to which access is made by a recording apparatus at a time of recording operation of the recording apparatus;
• an area A2 starting from an address t2 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 A3 starting from an address t3 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 A2 and A3, and said area A1 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 A1′ in the direction of the physical arrangement of the sectors between addresses t1′ and t2′, the addresses t from the address t1′ to the address t2′ are not consecutive, where t1<t1′, and t2′<t2, and arbitrary addresses tx can be set in the range A1′;
• 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.