Abstract: A data recording/reproducing method in recording media is disclosed in which track pitches and sector lengths are differently formed, wherein the method comprises: discriminating whether a target position and a current position of an optical pick-up are present in a zone where track pitches are different thereamong in response to data recording/reproducing command; and moving the optical pick-up to the target position via a boundary position where the track pitches are changed if it is discriminated that the current position and the target position of the optical pick-up are present in the zone where the track pitches are different thereamong, such that the optical pick-up can be accurately and swiftly moved to the target position during a data recording/reproducing operation in a high density optical disc where track pitches and sector lengths are not uniform.