An optical recording medium is described having a grooved recording layer. The structure of unwritten tracks must enable a scanning device to derive a radial tracking error signal according to the push-pull method. The structure of the written tracks must enable the scanning device to derive a radial tracking error signal according to the high-frequency phase-detection method. To this end the depth of the groove is in the range from 1/24 to 1/7 times the wavelength of scanning the recording medium, and the phase difference between a radiation beam reflected from a region on track in between written marks and from a mark, is in the range from 0.4 to 2.0 radians.
