[ Huaqiang Security Network News ] In our daily life, the video recorders we use are very similar to the PC devices we have seen. They are all in the hard disk file system. Currently, PC-based DVR is generally based on Windows. System, file system generally uses NTFS or FAT32; and the file system used by embedded DVR is closely related to the embedded operating system selected by the manufacturer. At present, the embedded operating systems used in embedded DVRs include RTOS, pSOS, embedded Linux, vxWorks, etc., and the file systems used are more types, such as MS-DOS compatible file system, UNIX compatible file system, and Windows compatible. File system, etc. This is facing a lot of compatibility issues. 
In response to the shortcomings of some file systems in the field of data storage, some professional teams began to develop a file system that is more suitable for storage. The video recorder is a video recorder segment from start to finish. The video recorder segment can range from a few seconds to tens of hours. It can range from a few K to tens of T. The use of this hard disk management method overcomes the shortcomings of the FAT system for long-term video management. Since there is no packet recording, there is no frame loss between the packet and the packet; the head does not need to frequently read and write data and file index to extend the life of the hard disk; after the hard disk is full, the frame-by-frame coverage technology is used, and there is no hard disk. Fragmentation. You can compare the hard disk to a video tape, and the error anywhere on the hard disk will not affect the video in front or behind. In the case of sudden power failure, the image immediately before the power failure can be saved. At the same time, the original video data disk is incompatible with the PC and cannot be directly modified on the PC to ensure the confidentiality and reliability of the original data.
Although there are compatibility problems in the FAT file storage method, it will be selected for the comparison of the current industry market capital investment ratio and development difficulty. Only a few companies in China have the technology to solve the compatibility problem. From the development direction of the embedded DVR hard disk file system, long-term stable recording can greatly improve the reliability of the DVR, but it requires a professional company to develop the hard disk. The capabilities and experience of the operating system. Therefore, in this respect, companies are still very competitive.
Although there are compatibility problems in the FAT file storage method, it will be selected for the comparison of the current industry market capital investment ratio and development difficulty. Only a few companies in China have the technology to solve the compatibility problem. From the development direction of the embedded DVR hard disk file system, long-term stable recording can greatly improve the reliability of the DVR, but it requires a professional company to develop the hard disk. The capabilities and experience of the operating system. Therefore, in this respect, companies are still very competitive.
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