Airborne radar-oriented data storage file management method and management system

Abstract

The invention discloses an airborne radar-oriented data storage file management method. The method comprises the following steps of: 1, continuously writing data of 128 clusters into a data area; 2, updating cluster link information corresponding to 128 cluster spaces in the FAT table; 3, repeatedly and circularly carrying out the operations of the previous two steps until the data of one file is completely stored; 4, caching FDT table information corresponding to the file; 5, repeating the operation of the previous four steps, and completing the data storage of 16 files in the data area and the FAT table; 6, completing file information updating corresponding to 16 files in the FDT table; and 7, completing subsequent data storage in sequence according to the operations of the previous six steps. According to the method, the address jump frequency caused by updating of the FAT table and the FDT table in the data storage process is greatly reduced, the problem that abrasion of three areas in a traditional FAT file system is unbalanced is solved, the data storage rate is increased, and the service life of a storage medium is guaranteed.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to an airborne radar-oriented data storage file management method and management system. Background technique [0002] Airborne radar has a high data rate, which can reach hundreds of Mbps or even Gbps in many applications. Such a high data rate has far exceeded the current wireless data transmission rate between the air and the ground, so airborne radar requires an on-board data storage system in many applications. [0003] Flash memory has the advantages of high storage density, strong vibration resistance, low power consumption, fast storage speed, and low price. It is the most widely used medium in solid-state data storage. Fully meet the requirements of high storage rate. [0004] Like other data storage systems, the flash-based airborne solid-state data storage system also requires the file system to manage its internal space, so that the data in the system can be read,...

AI Technical Summary

Problems solved by technology

The traditional method will cause two main problems: one is frequent address jumps, resulting in long read and write response time, because the physical space of the FAT table, FDT table and data area is usually discontinuous, and each stored cluster is about For tens of KB of data, the address needs to be jumped at least three times, and the read and write response time of discontinuous data in the physical space is longer, which cannot be ignored compared with the real single-cluster data write time; the second is the FAT table in the file area and The data update frequency of the FDT table is much higher than that of the data area, resulting in uneven wear and greatly reducing the service life of the storage medium, because the data area is only updated once when a single cluster of data is written, and the FAT table and the FDT table only need to update 4B and 32B respectively data, and the smallest unit of flash memory data writing is a sector of 512B space, causing the FAT table and FDT to update 512B data, so the update frequency of the FAT table and FDT table is at least dozens of times that of the data area in the process of continuous data storage

[0005] In short, airborne solid-state data storage generally has the problem of long read and write response time caused by frequent address jumps, and the problem of uneven wear caused by high update frequency of the file area, resulting in reduced data storage rate and reduced service life.

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