DBR (DOS boot record) data repairing method of FAT32 file system

Abstract

The invention relates to a DBR (DOS boot record) data repairing method of an FAT32 file system. The DBR data repairing method comprises the following steps of: opening a disk, positioning a sector where the DBR of the current FAT32 subsection is located in the disk, and searching a back-up DBR; reading information of a field to be repaired in the DBR, and copying the DBR information of other FAT32 subsections to non-BPB (Bios Parameter Block) field information; and for BPB field information, judging which one of the three types the field of which the information is to be repaired is in, and then repairing the different types of fields by using different methods, wherein the three types of fields comprise a field non-relevant to a file storage structure, a field relevant to the file storage structure without need of verification, and a field relevant to the file storage structure and in need of verification. According to the DBR data repairing method provided by the invention, the BPB field information in the DBR is reasonably classified, and different repairing methods are used for the fields with different types, so that the time and the cost for repairing the DBR parameters can be effectively reduced, and the accuracy of repairing the DBR parameter can be improved.

Description

technical field [0001] The invention relates to a data repair method, more specifically, to a DBR data repair method of a FAT32 file system. Background technique [0002] With the development of informatization and information technology, governments, enterprises and individuals pay more and more attention to information security. The core of information security is data security, and many factors such as virus infection, misuse, and accidents are threatening the security of data. Once some important data is damaged or lost, the loss is sometimes quite serious. However, in practical applications, it is difficult to avoid data damage and loss. Therefore, it is quite necessary to effectively restore the damaged important data. [0003] There are many software and methods for data recovery. Among them, partition repair software is an indirect method of data recovery, that is, recovering lost data by repairing partitions. The advantage of this repair method is: the recovery s...

AI Technical Summary

Problems solved by technology

However, at present, these partition repair software or methods cannot better meet the needs of FAT32 DBR data repair, wherein FAT32 is a widely used Windows file system, and many operating platforms support the FAT32 file system

[0004] At present, there are generally two methods for repairing FAT32 DBR data: one is to use the "backup repair method", but when the backup DBR is damaged, the repair results of this method will be completely invalid; the other is to use the partition type and The difference in size reassigns each field of DBR, and the assignment of some parameters adopts default values ​​or statistical values, which is obviously incorrect

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