Method and device for storing data

Abstract

The invention provides a method for storing data. The method comprises the steps of: verifying the integrity of the stored metadata file after starting, if incomplete metadata files exist, recovering the incomplete metadata files by using an integrated first backup file or integrated second backup file; writing the received data stream or information stream into the metadata files, and recording the updating times of the metadata files; and backing up the integrated metadata files and the updating times to the first backup file or the second backup file according to a preset backup threshold. The invention also provides a device for storing data. By adopting the method and the device provided by the invention, the performance and stability of the system can be improved, and the data size lost due to unusual power failure is reduced.

Description

Technical field [0001] The invention relates to the field of security and protection, in particular to a method and device for storing data in the field of video surveillance. Background technique [0002] figure 1 Flow chart for the existing method of using digital hard disk video recorder to store data. Now combined figure 1 , Describe the method of using digital hard disk video recorders to store data in the existing video surveillance field, as follows: [0003] Step 100: Format and partition the hard disk; [0004] Step 101: In each partition, create two index files with the same content and N data files with a fixed size of M bytes in advance; [0005] Among them, the index file records data file start time, end time, video clip size, file serial number, data file status and other information; data file status includes three types: unrecorded, recorded, and recording; N and M are both integers greater than 1. . [0006] Step 102: Write the recording start time and recording inf...

AI Technical Summary

Problems solved by technology

[0015] When using the existing method of storing data with a digital hard disk video recorder for data storage, if an abnormal power failure occurs during the recording of the index file, the index file being written will be damaged, and when it is restarted, the abnormal data cannot be corrected. Although the index file damaged by power failure can be operated, another index file without error can be used to find the data file. However, the index file damaged by abnormal power failure cannot be repaired in time, and the data stored in the corresponding data file In the process of writing data after startup, it will be overwritten by the d

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