FIELD: information technologies.
SUBSTANCE: in system with application of carrier intended for single record, in which possibility of accidental access is provided, with application of information that indicates recorded/unrecorded condition, in control information that comprises gap bitmap and information of the last recording position ("АПЗ"), which indicates the last position of user recorded data, is updated on disk, in compliance with formation or disappearance of gap (area without record) in area before "АПЗ". Condition of compliance between control information on disk and record of user data is confirmed in accordance with control information updating on disk, with creation or elimination of gap in control information, by means of detection of the fact whether gap registered in control information (gap indicated with gap bitmap) or "АПЗ" matches actual gap or "АПЗ" on disk. In case there is no compliance, control information is updated to provide compliance of gap bitmap or "АПЗ".
EFFECT: optimal updating of control information and simple processing for compliance.
8 cl, 23 dwg
