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    • 7. 发明申请
    • ACCESS DEVICE, INFORMATION RECORDING DEVICE, INFORMATION RECORDING SYSTEM, FILE MANAGEMENT METHOD, AND PROGRAM
    • 访问设备,信息记录设备,信息记录系统,文件管理方法和程序
    • US20110022645A1
    • 2011-01-27
    • US12934334
    • 2009-04-01
    • Takuji MaedaShinji Inoue
    • Takuji MaedaShinji Inoue
    • G06F17/30
    • G06F11/1435G06F11/1004G06F17/30091
    • An information recording device, which includes a nonvolatile memory whose areas are managed using an FAT file system and enhances the reliability of directory entries using a cyclic shift checksum, recalculates the cyclic shift checksum efficiently and performs seeking at a higher speed. A nonvolatile memory (25) of an information recording device 2 is managed using an FAT file system. In the memory, a plurality of directory entries are allocated to a single file. The device enhances the reliability of the directory entries using a cyclic shift checksum, and manages information indicating the position and the size of a storage area of file data using an extent information entry (203). The device further uses an update information entry (204) and a dummy entry (205).
    • 包括使用FAT文件系统管理区域的非易失性存储器并且使用循环移位校验和提高目录条目的可靠性的信息记录装置重新计算循环移位校验和并以更高的速度执行寻找。 使用FAT文件系统来管理信息记录装置2的非易失性存储器(25)。 在存储器中,将多个目录条目分配给单个文件。 该装置使用循环移位校验和增强目录条目的可靠性,并且使用扩展信息条目来管理指示文件数据的存储区域的位置和大小的信息(203)。 设备还使用更新信息条目(204)和虚拟条目(205)。
    • 10. 发明授权
    • Information recording medium and region management method for a plurality of recording regions each managed by independent file system
    • 用于由独立文件系统管理的多个记录区域的信息记录介质和区域管理方法
    • US07653796B2
    • 2010-01-26
    • US10546453
    • 2004-02-19
    • Shinji InoueTakuji Maeda
    • Shinji InoueTakuji Maeda
    • G06F13/00
    • G06F3/0644G06F3/0607G06F3/0643G06F3/0674G06F3/0679
    • A region management method for an information recording medium capable of maintaining data interchangeability among devices and preventing malfunction when one information recording medium shared among devices different in type or number of file systems that can be interpreted by devices is provided. A recording region of the information recording medium is divided into a plurality of regions, and region information such as position and size of each region is held in the information recording medium. Different file systems are constructed in individual data recording regions. In response to a command from an information processing apparatus, accessible regions by the information processing apparatus are changed over by, for example, referring to validity flag information that indicates a presently valid region.
    • 一种用于信息记录介质的区域管理方法,用于在设备中可以解释的文件系统的类型或数量不同的设备之间共享一个信息记录介质时,能够维护设备之间的数据可互换性并防止故障。 信息记录介质的记录区域被划分为多个区域,并且各区域的位置和大小等区域信息保存在信息记录介质中。 在各个数据记录区域中构建不同的文件系统。 响应于来自信息处理设备的命令,通过例如参考指示当前有效区域的有效性标志信息来改变信息处理设备的可访问区域。