| 摘要 |
A method of updating disc information of an optical disc includes checking whether a file system bitmap in a user data area of the optical disc had been updated, and updating disc information in a lead in area of the optical disc when the file system bitmap had been updated. By choosing an appropriate updating timing of the disc information, the present invention can reduce the risks of accidents such as power break down or abnormal host behavior occurring before the disc information is updated completely, and can prevent frequent access of locations storing the disc information. Besides one method to choose the appropriate updating timing of disc information is introduced in this invention, one method to recover the bitmap of disc information is also introduced if the optical disc has bitmap table and bitmap table is defective.
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