Patent ID: 8400890

Claim:
An optical information storage medium with at least one information storage layer, wherein the optical information storage medium has a management area that stores at least one unit containing control information about the optical information storage medium, and wherein the control information includes a format number, which provides information about at least a write strategy type and a write pre-compensation type, and a write strategy parameter, which provides information about the magnitude of shift in a leading edge position, or variation in the pulse width, of a write pulse train to form a recording mark, and wherein the value of the format number changes according to a combination of the write strategy type and the write pre-compensation type, wherein a preceding space length that is a length of a space preceding the recording mark is classified into M-types (where M is an integer equal to or greater than two) with the first to M th types, wherein the write strategy parameter includes a reference value that is information indicating the magnitude of shift in the leading edge position of the write pulse train with respect to the classification of the M-type, and wherein the write strategy parameter further includes differential information with respect to the reference value, and the differential information is information that shows the magnitude of shift in the leading edge position of the recording pulse train with respect to another classification that is different from the M-type classification and with the first to (M−1) th types.