| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology allowing easy update processing in a short time even when updating a lot of data of a storage medium of a navigation device. SOLUTION: In this data update system, a directory structure corresponding to a partition structure of the storage medium is formed, an image file IF of data contents after update inside each partition HDn (n=0, 1, 2, 4, 6) is generated, and is stored in a directory DIR corresponding to each of the partition HDn in the directory structure formed with the generated image file IF of each of the partition HDn, and data contents of the image file IF read from the directory DIR corresponding to the partition HDn are written into each of the partition HDn of the storage medium. COPYRIGHT: (C)2009,JPO&INPIT
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