| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently store data and backup data using a memory while improving the memory corruption resistance of a NAND flash memory. <P>SOLUTION: When data is stored in the NAND flash memory 11, the data is stored by using each page in order. An identification number (ID number) is assigned to each data to be stored, and the identification number is inserted to the header of each data. The data management device extracts ID numbers of all pages to generate memory management information, manages the storage position of data identified by each ID number, and determines a writable area for writing new data by specifying continuous pages with ID numbers showing non-use. When data corruption is recognized by checksum of the headers, the pages are retroactively checked to find data of the same ID number stored previously, and data is restored by use of this data. <P>COPYRIGHT: (C)2008,JPO&INPIT |
