FIELD: information technology.
SUBSTANCE: data medium includes an information control area and a user data area. At least one writing session has such a configuration that it contains at least one of at the at least one writing area. Control information contains identification information on the writing interval, information for identifying the writing area lying on the session boundary and written in at least one unit which is the writing unit.
EFFECT: less information for identifying session boundaries and larger area for recording user data.
3 cl, 25 dwg
