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    DATA ERASING METHOD
    1.
    发明申请
    DATA ERASING METHOD 审中-公开
    数据删除方法

    公开(公告)号：US20170060474A1

    公开(公告)日：2017-03-02

    申请号：US15248577

    申请日：2016-08-26

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Takeharu YAMAMOTO ,  Yoshihisa TAKAHASHI ,  Toshiaki TAKASU

    IPC: G06F3/06

    CPC classification number: G06F3/0652 ,  G06F3/0619 ,  G06F3/0677 ,  G06F3/0689

    Abstract: A data erasing method of the present disclosure is a data erasing method for erasing data stripe-recorded in a plurality of write-once optical discs constituting a redundant arrays of inexpensive disks (RAID) system and each including a plurality of data recording blocks and a redundant data block. In the data erasing method, alternate recording of at least one target block and the redundant data block is performed in a predetermined alternate area. The target block is one of the data recording blocks in which target data as erase target data is recorded. The target block is overwritten such that the target data is not correctly read.

    Abstract translation: 本公开的数据擦除方法是用于擦除构成廉价磁盘（RAID）系统的冗余阵列的多个一次写入光盘中条带记录的数据的数据擦除方法，并且每个包括多个数据记录块和 冗余数据块。 在数据擦除方法中，在预定的交替区域中执行至少一个目标块和冗余数据块的交替记录。 目标块是其中记录作为擦除对象数据的目标数据的数据记录块之一。 目标块被覆盖，使得目标数据未正确读取。

    INFORMATION RECORDING DEVICE AND INFORMATION RECORDING METHOD
    2.
    发明申请
    INFORMATION RECORDING DEVICE AND INFORMATION RECORDING METHOD 审中-公开

    公开(公告)号：US20170097789A1

    公开(公告)日：2017-04-06

    申请号：US15277804

    申请日：2016-09-27

    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

    Inventor： Toshiaki TAKASU ,  Takahiro YAMADA ,  Kenichi TANAKA ,  Hirotaka ENDOU ,  Kouretsu BOKU

    IPC: G06F3/06

    CPC classification number: G06F3/0677 ,  G06F3/0604 ,  G06F3/0643 ,  G06F3/0652

    Abstract: An information recording device including a controller records information in a write-once optical disk group including one or a plurality of write-once optical disks. When recording new data, the controller calculates a residual quantity of an alternate area. The calculation of the residual quantity of the alternate area corresponds to a subtraction of a first consumption size and a second consumption size from a size of the alternate area of the write-once optical disk group. The first consumption size is a size of the alternate area already consumed when the data recorded in the write-once optical disk group was erased. The second consumption size is an estimated size of the alternate area to be consumed when the data recorded in the write-once optical disk group is erased. The controller records the new data when the residual quantity is greater than or equal to a third consumption size.

    INFORMATION RECORDING DEVICE AND DATA ERASING METHOD
    3.
    发明申请
    INFORMATION RECORDING DEVICE AND DATA ERASING METHOD 审中-公开
    信息记录装置和数据擦除方法

    公开(公告)号：US20170031960A1

    公开(公告)日：2017-02-02

    申请号：US15221916

    申请日：2016-07-28

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Toshiaki TAKASU ,  Shinichi KIMURA ,  Takeharu YAMAMOTO

    IPC: G06F17/30 ,  G06F12/0804 ,  G06F3/06

    CPC classification number: G06F12/0804 ,  G06F3/0605 ,  G06F3/0652 ,  G06F3/0677 ,  G06F16/23

    Abstract: An information recording device includes: a storage in which a database is stored, the database managing data recorded in an optical disk and history data associated with the data; and a controller that controls recording, update, and erase of the data with respect to the optical disk. The history data is pre-update data when the data recorded in the optical disk is updated. The controller determines whether at least one piece of history data associated with target data exists when the target data recorded in the optical disk is erased, and the controller erases the target data and the history data associated with the target data on the optical disk when at least the one piece of history data associated with the target data exists.

    Abstract translation: 信息记录装置包括：存储数据库的存储器，数据库管理记录在光盘中的数据和与数据相关联的历史数据; 以及控制器，其控制关于光盘的数据的记录，更新和擦除。 当更新记录在光盘中的数据时，历史数据是更新前的数据。 当记录在光盘中的目标数据被擦除时，控制器确定是否存在与目标数据相关联的至少一条历史数据，并且控制器在当时在光盘上擦除与光盘上的目标数据相关联的目标数据和历史数据 至少存在与目标数据相关联的一条历史数据。

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