Vehicle DVR (Digital Video Recorder) hard disk data storage method

Abstract

The invention discloses a vehicle DVR (Digital Video Recorder) hard disk data storage method. The vehicle DVR hard disk data storage method comprises step 1, dividing an available storage area of a vehicle DVR hard disk into an ext3 file system partition and a file-free system partition; step 2, collecting video files and dividing the collected video files into index files and video data corresponding to the index files; step 3, storing the index files in the ext3 file system partition and storing the video data corresponding to the index files in the file-free system partition according to the time sequence; step 4, performing cyclic covering when a storage space of the file-free system partition is full and cyclically cover the corresponding index files in the ext3 file system partition. According to the vehicle DVR hard disk data storage method, a file-free system storage method is adopted and accordingly the operation on a disk is reduced as far as possible, the convenience of the data storage and reading is ensured, the storage capacity is increased, the visits to the disk are reduced, and the damage rate of the disk is reduced, and the later maintenance cost is reduced.

Description

technical field [0001] The invention relates to a data storage method, in particular to a data storage method for a vehicle-mounted DVR hard disk. Background technique [0002] The existing car DVR (digital video recorder) storage methods mainly include the following three methods: 1. Using SD card storage, the disadvantage is that the capacity is small, the reading and writing speed is not fast enough, and it is easy to be damaged due to accidental power failure. The advantage is that it is not afraid of bumpy environments. 2. Using SSD (Solid State Drive) for storage has the advantages of large capacity, fast read and write speed, and is not afraid of bumps, but the price is relatively expensive, which increases product costs. 3. The traditional mechanical hard disk is used for storage, and the cache is used (the cache uses a storage medium without mechanical parts), that is, when the environment is in a bumpy environment, it is stored in the cache, and when it is stable, ...

AI Technical Summary

Problems solved by technology

[0002] The existing car DVR (digital video recorder) storage methods mainly include the following three methods: 1. Using SD card storage, the disadvantage is that the capacity is small, the reading and writing speed is not fast enough, and it is easy to be damaged due to accidental power failure. The advantage is that it is not afraid of bumpy environments

2. Using SSD (Solid State Drive) storage, the advantage is large capacity, fast read and write speed, not afraid of bumps, but the price is more expensive, which increases product cost

The advantage of this method is that it solves the problems of storage capacity, storage speed and cost. The disadvantage is that a special file system is used to manage data on the hard disk. Because of the existence of the file system, the workload of reading and writing to the hard disk is increased, and the hard disk is storing DVR data. When you have to read and write a lot of data corresponding to the maintenance file system, it greatly increases the workload of the hard disk.

Because the cache space is limited, it cannot be guaranteed that the hard disk will only store data when it is stable. When the cache is full, even if the road environment cannot meet the hard disk storage requirements, the hard disk must be read and written.

The more you read and write to the hard disk in a bumpy environment, the easier it is to damage the hard disk, and the price of a hard disk is not cheap, which will increase the later maintenance cost

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