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公开(公告)号：US20180108378A1
公开(公告)日：2018-04-19
申请号：US15718378
申请日：2017-09-28
Inventor： Yoshikazu YAMAMOTO , Yoshihisa TAKAHASHI , Atsushi KIYOMURA
CPC classification number: G11B20/1816 , G11B20/10388 , G11B2020/1823
Abstract: An optical disc device includes: an optical disc drive that reads data from a plurality of optical discs in which user data is recorded while distributed in the plurality of optical discs; a memory unit in which data read from an optical disc of a first group that is a part of the plurality of optical discs is recorded through the optical disc drive; and a controller that reproduces the user data from data of a remaining optical disc except for the first group, the data of the remaining optical disc being read through the optical disc drive, and the data recorded in the memory unit.
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公开(公告)号：US20170278541A1
公开(公告)日：2017-09-28
申请号：US15356847
申请日：2016-11-21
Inventor： Hisae KATO , Yoshikazu YAMAMOTO , Motoshi ITO
CPC classification number: G11B20/1889 , G11B20/1217 , G11B2020/1241
Abstract: An information recording method of recording information is provided in an information recording medium having a plurality of recording layers including a first recording layer and a second recording layer located to be closer to a surface than the first recording layer, each of the plurality of recording layers includes a user data area for recording user data, a spare area for alternatively recording data of failed recording into the user data area, and a management information area for recording management information. The first recording layer is used as a recording object layer at start of recording. When any one of the user data area, the spare area, and the management information area of the first recording layer runs short of a free space, then the recording object layer of the user data area, the spare area, and the management information area is switched over to the second recording layer.
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