| 摘要 |
A computer file system, in which directory files and real files are organized in a tree structure, includes data items which are recorded in a high-ranking directory file in the tree structure, a high-ranking file management table which records file management data indicative of the assignment relation with low-ranking directory files or real files created below the high-ranking directory file, and a low-ranking file management data which is stored in any of the low-ranking directory files and indicative of the assignment relation between the low-ranking directory file and other low-ranking directory files or real files. The system further includes an assignment relation copy device which copies the file management data of a high-ranking or low-ranking file management table indicative of the assignment relation between the high-ranking or low-ranking directory files or real files into another high-ranking or low-ranking file management table.
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