INFORMATION RECORDING AND REPRODUCTION DEVICE, METHOD FOR RECORDING AND REPRODUCING INFORMATION AND RECORDING MEDIUM

摘要

An information recording and reproduction device (1) records main information and management information on an optical disk (50) that has a guide layer (51) and a plurality of recording layers (52). The information recording and reproduction device is provided with a recording and reproduction optical system for irradiating one recording layer with a first light beam (L1) for recording or reproduction through an object lens (101), a servo optical system for irradiating the guide layer with a second light beam (L2) for tracking through the object lens, and a preformat means which performs tracking control for the object lens on the basis of a signal acquired from the servo optical system, and forms a plurality of discrete additional recording regions (400) by emitting the first light beam with partial suspension from the recording and reproduction optical system.