FIELD: multilayered optical disks, devices and methods for recording and reproduction on disks.
SUBSTANCE: multilayered optical disk includes disk setting zone, starting zone, data zone and internal service zone, which contains information about tracked tracking signals polarity and reflective ability information.
EFFECT: possible receipt of information about polarity of tracking signal and/or information about reflective ability without usage of trial and error method, possible direct recording or reproduction of user data in data zone of optical disk.
6 cl, 12 dwg
