Data storage method of file allocation table
A file allocation table and data storage technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of long time spent and affecting the speed of file continuation, and achieve the effect of improving the speed of continuation
Inactive Publication Date: 2012-12-26
BYD CO LTD
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When storing data in the existing file allocation table, the applicant found that when continuing to write to a created file, it is necessary to start from the first cluster of the file and search for the next cluster in turn according to the cluster chain relationship until the last cluster is found. The continuation of the file starts after one cluster. However, as the capacity of the file increases, it will take longer to find the last cluster of the file, which affects the speed of the continuation of the file.
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[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0029] In the existing file allocation table data storage method, when a file is continued to be written, it is necessary to start from the first cluster of the file, search for the next cluster in turn according to the cluster chain relationship, and start to continue the file until the last cluster is found. Write, and as the capacity of the file becomes larger and larger, it will take longer to find the last cluster of the file, thus affecting the speed of file continuation. In order to solve the technical problems existing in the existing technology, the applicant fi...
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The invention discloses a data storage method of a file allocation table. The data storage method comprises the following steps of: writing a file into a cluster in a free state in a disc, and recoding the final written cluster as a current cluster of the file after the file is written. The data storage method of the existing file allocation table is overcome; when the file is continued to be written, the next cluster is orderly searched according to the cluster chain relationship from the first cluster of the file, and the file is written until the final cluster is searched, so that the larger the capacity of the file is, the longer the time for searching the final cluster of the file is, thereby affecting the writing speed of the file. Therefore, compared with the prior art, the time for searching the final cluster is saved by the data storage method of the file allocation table, so as to greatly improve a writing speed of the file.
Description
technical field [0001] The invention belongs to the field of data storage of file systems, and in particular relates to a data storage method of a file allocation table. Background technique [0002] File Allocation Table (English: File Allocation Table, FAT for short), as a file system, is widely used in various devices with data storage function (such as SD card). When storing data in the existing file allocation table, the applicant found that when continuing to write to a created file, it is necessary to start from the first cluster of the file and search for the next cluster in turn according to the cluster chain relationship until the last cluster is found. The continuation of the file begins after one cluster, but as the capacity of the file increases, the time it takes to find the last cluster of the file will also be longer, thereby affecting the speed of the continuation of the file. Contents of the invention [0003] In order to solve the technical problem that...
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IPC IPC(8): G06F17/30
Inventor 宋俊俊邱晓伟蓝梅
Owner BYD CO LTD