Patent ID: 8203927
Filing Date: 2012-06-19
Classification: G11B

Abstract:
1. An information recording apparatus for recording data onto an information recording medium in a rewritable manner, the information recording medium including a first recording layer and a second recording layer, each of the first recording layer and the second recording layer including at least a data recording area, and at least one of the first recording layer and the second recording layer includes an address recording area, the information recording apparatus comprising: a first recording device that records the data into the data recording area in each of the first and second recording layers on the information recording medium such that the data is alternately recorded into the data recording area in the first recording layer and the data recording area in the second recording layer by a unit of a predetermined data size, while giving one attribute, which corresponds to the recorded data, of a plurality of types of attributes in each of segmentized area units; a second recording device that records, into the address recording area on the information recording medium, i) an address of an outermost edge portion of a first continuous recording area, wherein i-1) the first continuous recording area is a continuous recording area to which a data area attribute of the plurality of types of attributes is given, and i-2) the first continuous recording area is a recording area closest to an innermost edge portion of the information recording medium in the first recording layer, and ii) an address of an outermost edge portion of a second continuous recording area, wherein ii-1) the second continuous recording area is the continuous recording area to which the data area attribute is given, and ii-2) the second continuous recording area is a recording area closest to an innermost edge portion of the information recording medium in the second recording layer, wherein the data area attribute indicating a status that user data is recorded as the data; a formatting device that performs a format process on a desired recording area of the information recording medium; and a controlling device that controls said formatting device to start the format process toward an outer circumferential side from the outermost edge portion of the first and second continuous recording areas if the format process is performed on the predetermined recording area, wherein a) a start edge portion of the predetermined recording area is located on a more inner side than the outermost edge portions of the first and second continuous recording areas, and b) an end edge portion of the predetermined recording area is located on a more outer side than the outermost edge portions of the first and second continuous recording areas, wherein an address in said first recording layer increases from an inner circumferential side toward an outer circumferential side, wherein an address in said second recording layer decreases from the inner circumferential side toward the outer circumferential side, wherein the first recording device 1) records the data into the data recording area in each of the first and second recording layers by a unit of a plurality of the predetermined data size, 2) records the data, in the first recording layer, along a first direction that is from the inner circumferential side toward the outer circumferential side, 3) records the data, in the second recording layer, along a second direction that is from the outer circumferential side toward the inner circumferential side, and 4) forms a shifted middle area, by recording the data to which middle area attribute of the plurality of types of attributes is given, on an outer side of the data to which the data area attribute is given after the recording of the data to which the data area attribute is given is completed, wherein the second recording device records a largest address of the first continuous recording area as the address of the outermost edge portion of the first continuous recording area, wherein the second recording device records a minimum address of the second continuous recording area as the address of the outermost edge portion of the second continuous recording area, and wherein the controlling device controls the formatting device to overwrite the shifted middle area by the data to which the data area attribute is given, when the format process is performed with respect to the shifted middle area.