Research On Data Recovery Technology Based On Media Storage Structure

Information and various data are the most valuable riches in information society, the loss or damage of critical data will result in irreparable damage. The purpose of this paper is to investigate how to prevent these important data from being damaged and how to recover data or electronic evidence of the crime that has been lost or destroyed.This thesis mainly focuses on the theory and methods of file recovery and partition recovery. Some results are obtained and summarized as follows:1. The data recovery technology at home and abroad is summarized. The principle of magnetic media storage is discussed briefly. The structure of main partition and file system are illuminated.2. The principle of file storage is investigated. The performance of the domestic and foreign data recovery software to recovery the file and partition are analyzed, and the merit and shortcoming are summarized.3. For the shortcoming of traditional data recovery software which can't recovery data when the directory or master file table is damaged, the file-level data recovery algorithms based on DATARUNS and pattern matching, and the programs of incomplete compound document recovery are proposed. Experimental results show that these algorithms and programs have a good performance to recovery some of the data under extreme data disaster.4. To compensate the shortcoming of traditional data recovery software can't recovery the partition chain when it is multiple damaged or overwritten, a set of relatively complete partition table rules is proposed. Based on these rules, the partition location algorithm and computing tool of the partition table are given, the test and analysis results show that this method can effectively recover the partition when the MBR, EBR and DBR and others are damaged.