METHOD AND DEVICE FOR RESTORING SYSTEM FILE INDEXES

摘要

The present invention provides a method and device for restoring system file indexes, which belongs to the technical field of data store methods. In the present invention, when a storage medium is loaded and an index information set is not read, or when the storage medium is loaded and the indexes in the index information set are judged to be incorrect, or when a read operation is executed for a file in the storage medium and an index of the file in the index information set doesn't correspond to a backup index in the file, or when a writing operation is executed for a file in the storage medium and an index of the file in the index information set doesn't correspond to a backup index in the file, the backup indexes of all files in the storage medium are updated, and the index information set is restored or re-established. By using the method and device for restoring system file indexes of the present invention, a deficiency of repeated restarts without recording is overcome.

主权项

1. A method for restoring system file index, comprising:
step A. when a storage medium is loaded, judging whether an index information set is read or not, if no, executing a step E, if yes, executing a step B; step B. judging whether an index in the index information set is correct or not, if no, executing the step E; step C. when executing a read operation for a first file in the storage medium, judging whether an index of the first file in the index information set corresponds to a backup index in the first file or not, if no, executing the step E; step D. when executing a writing operation for a second file in the storage medium, judging whether an index of the second file in the index information set corresponds to a backup index in the second file or not, if no, executing the step E; step E. updating backup indexes of all files in the storage medium, and restoring or re-establishing the index information set.