Method for protecting hardware key information area in embedded device

Abstract

This invention relates to a protection method for hard disk key information region in an inserted device including the following steps: 1, partitioning a disk and formatting, 2, pre-setting up files, setting up index files and N audio and video data files, the lengths of the files are 0 bytes and the length of the index files is corrected, 3, freezing and protecting the key information region of the disk when recording, 31, when writing every disk, comparing the destination address of the disk and the address sphere of a key information region, if it is in the sphere, then the disk drive program returns back the mistake directly, 32, all read / write operations to the index files and audio and video data files will not refresh the directory entry and FAT table.

Description

technical field [0001] The invention belongs to the field of information technology, and provides a method for protecting a key information area of ​​a hard disk in an embedded device, aiming at the characteristics of an embedded hard disk video recorder recording data on the hard disk. Background technique [0002] In the field of digital audio and video surveillance, with the development of embedded technology, EDVR (Embedded Digital Video Recorder) has fundamentally improved in performance, function, applicability, maintainability, stability and other aspects. , so its application fields are becoming wider and wider, from the initial financial field to various application places such as transportation, public security, electric power, mobile vehicles, and mining. With the diversification and complexity of the application environment, higher requirements are put forward for the reliability and fault recovery ability of the embedded digital hard disk video recorder. [000...

AI Technical Summary

Problems solved by technology

Since hard disks perform read / write operations in units of sectors, if the write operation of the hard disk is interrupted abnormally due to abnormal power failure or other reasons when updating the FAT table or directory entry of the file, it is easy to cause the entire sector to be corrupted. The data is corrupted, resulting in the loss of one or more files or the wrong state

Since the hard disk of the embedded DVR is used to record real-time audio and video data, the writing operation to the hard disk is very frequent, and the content of the directory entry or FAT table is constantly modified. In various complex application environments, it is easy to damage the hard disk due to various reasons. "soft errors" of

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