FIELD: optical record media. SUBSTANCE: proposed record medium designed to store information about original position for each zone after bootstrap or reboot has plurality of zones. Each zone has users data area to store users data. Plurality of zones form group to control defects at group level. There are also spare area to replace defects for group and also preset area wherein information about original position for each zone is stored. Provision is made for processing great number of defects at varying replacement ensured by integration of plurality of zones within one group. EFFECT: enhanced recording and reproduction stability. 27 cl, 6 dwg
