Patent ID: 8023383
Filing Date: 2011-09-20
Classification: G11B

Abstract:
1. A recording apparatus, comprising: a recording device for recording record information by irradiating laser light onto a recording medium comprising: (i) a first recording layer which is irradiated with the laser light to thereby record therein the record information and which has a middle area in which the record information is recorded; and (ii) a second recording layer which is irradiated with the laser light through the first recording layer to thereby record therein the record information and which has an ODTA (Outer Disc Testing Area) whose edge on an inner circumferential side corresponds to an edge on an outer circumferential side of the middle area; and a controlling device for controlling said recording device to record pre-information of the record information before a finalizing, into an area portion which is one portion of the middle area and whose addresses range from an address “A” to an address “B1”, wherein the address “A” is the most inner circumferential address of the middle area, the address “B1” is an address of the position obtained by shifting toward the inner circumferential side of the middle area by a tolerance length from the edge on the most outer circumferential side of the middle area, and the tolerance length indicates an acceptable range of a relative position shift between an address which is defined on the predetermined position in the first recording layer and an address which is related to the predetermined position in the second recording layer, wherein the tolerance length is set to substantially 40 μm in a radial direction of the recording medium.