Research And Implementation Of Technology In Hard Disk Formatted Data Recovery

As the fast development of information globalization, information has become an important resource, and the global competition has become increasingly fierce as well. "Computer has price, but data is priceless." is a kind of recognition of the importance of computer data in the information era. The development of information society has made the information resources become valuable assets,therefore disaster recovery has been made to be a new subject nowadays. System and data recovery technology come into being and become a heated issue for study at present. Data loss is quite common and is also very complex. Hard disk Formatted data recovery belongs to the"soft recovery". The recovery technology can bring far-reaching influence on individuals, businesses and even the whole country. So, it is very important to develop hard disk formatted data recovery software.This article first introduces the significance of the study,and analyzes the relative researches at home and abroad. An in-depth analysis and research of the hard disk data storage structure is given in this part, including FAT32, NTFS file system structure under Windows and EXT3 file system structure under Linux. What is followed is the focus, that is, the design and implementation of the hard disk formatted data recovery system, including partition table recovery, formatted data recovery on Windows and Linux three aspects in detail. Finally a comparison is made between this scheme and other popular formatted data recovery software according to the experimental results, which can be listed as follows:In terms of the design and the implementation of partition table recovery,this thesis mainly presents the initialization process, obtains physical sector number of each partition node, as well as recovery the partition table using physical sector number in detail.In terms of the design and implementation of formatted data recovery on windows, this thesis mainly presents the design of formatted data recovery on Windows FAT32 and formatted data recovery on Windows NTFS. Their implementation is given in details.In terms of the design and implementation of formatted data recovery on Linux, this thesis mainly presents the design of four data recovery schemes on Linux, and focus on the implementation of "RAW" file recovery.Finally, the analysis of hard disk formatted data recovery system is made. The thesis also summarizes the design and its implementation, and puts forward new requirements for the follow-up system development.