A data recovery method and system

A recovery method and system recovery technology, applied in the field of computer systems, can solve problems such as no creation date, incorrect file size, and no file directory structure

Active Publication Date: 2011-12-21
WONDERSHARE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) no creation date;
[0006] 2) No modification date;
[0007] 3) The file size may be incorrect;
[0008] 4) No original file name;
[0009] 5) Directory structure without files;
[0010] 6) Fragmented files cannot be recovered;

Method used

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  • A data recovery method and system
  • A data recovery method and system

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Embodiment Construction

[0054]In the HFS+ file system under MAC OS, the log refers to a data area maintained in HFS+ to maintain the correctness of the file system, which stores some information related to file operations. After further research on the HFS+ file system, it is found that when users move, delete, create and other operations on files, they will write logs to its log system at the same time, so as to verify the file system in case of abnormal shutdown , to ensure the integrity of the file system. These logs also contain file description information for some deleted files.

[0055] As mentioned above, in the HFS+ file system under the MAC platform, after the user deletes the file, it is deleted together with the file description information. But for a period of time, the data of the recently deleted file and its file description information will still be saved in the log. In response to this situation, the present invention conceives a data recovery method for the HFS+ file system under...

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PUM

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Abstract

The invention relates to a data recovery method and system for recovering the HFS+file system under MAC OSX of Apple. The method comprises the following steps: A, reading a log; B, analyzing the log; and C, recovering a file by use of the file description information contained in the log. The file description information comprises file name, file path, creation time and data area of the file; andthe file path comprises the ID of the directory entry of the file as well as the ID of parent directory entry. The data recovery method and system provided by the invention have the beneficial effects that: data recovery is performed through the HFS+file system according to the log, the effect of quick scanning under MAC is realized, the shortcomings of no original file name, no file path and thelike in data file recovery under MAC are overcome, and the speed is many times faster than that of the deep scanning.

Description

technical field [0001] The present invention relates to a computer system, more specifically, relates to a data recovery method and system for the HFS+ file system under MAC OS X, to retrieve deleted files. Background technique [0002] At present, data recovery is generally divided into "deep scan" and "quick scan". "Deep Scan" scans the entire disk according to the identifier of a specific file. The disadvantage is that the scanning speed is slow and there is no information such as file name, file path, and file creation time. "Quick Scan" restores files based on the file description information of the file system. It makes up for the shortcomings of deep scanning, with fast scanning speed and information such as file name, file path, and file creation time. [0003] The file system under the Windows platform is generally NTFS, fat32, etc. After the user deletes the file, it is only changed to deleted in the file description information. When recovering, you only need t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06F11/14
Inventor 冯星
Owner WONDERSHARE TECH CO LTD
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