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Catalog inlet system without recovering and method thereof

A directory and entry technology, applied in the field of file systems, can solve problems such as space waste, time-consuming, and difficult to use

Inactive Publication Date: 2009-09-16
SUNPLUS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the uncertainty of space usage, when traversing the file system, it is necessary to read the directory entry 12 one by one and judge the content of the directory entry 12 in order to obtain complete and sufficient information to judge the next directory / file 13 presence or absence, and location of archive 13, thus generating a waste of time
by the above figure 2 , image 3 ,and Figure 4 It can be seen from the flow chart that the operation of the directory entry 12 of the existing FAT32 file system is still quite time-consuming due to the need to perform multiple comparisons in the prior art
Simultaneously, because after a directory / file 13 is deleted, because the length of space left over by it is also uncertain, it is difficult to use these spaces for subsequent files 13, which also causes a waste of space
Therefore, there are still many deficiencies in the existing file system and it is necessary to improve it

Method used

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  • Catalog inlet system without recovering and method thereof
  • Catalog inlet system without recovering and method thereof
  • Catalog inlet system without recovering and method thereof

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Embodiment Construction

[0025] Currently common random access media, such as hard disks, NOR-type flash memory, or NAND-type flash memory, etc., use a sector as the smallest access unit, and each sector contains 512 bytes. The file system (file system) uses one or more directory entries (directory entry, DE) to record the name and related data of a directory / file. In the present invention, the file mentioned herein generally refers to a directory or a file, which is an existing term used by those skilled in the art. That is, the technology of the present invention can be applied to directories or files in a file system. Each directory entry uses 32 bytes (byte) of space. That is, one sector can accommodate 16 directory entries. Since a file in FAT occupies up to 10 directory entries, one sector is enough to accommodate the directory entries of any directory / file. The invention stores the directory entry of a directory / file in the same sector, thereby reducing the operation time of the directory en...

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PUM

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Abstract

The present invention relates to a directory entry system and its method without recovery, which is applied to a file system. The file system uses directory entries to record a file / directory name. The directory entry system consists of multiple files stored in a storage device. Composed of directory entries, the storage device has multiple sectors, each sector only records the directory entry corresponding to a file / directory, and each directory entry has a directory name field, a directory attribute field and a reserved field. The directory name field is used to record the name of the corresponding file / directory. The directory attribute field is used to record the attribute of the corresponding file / directory. The reserved field is used to record an identification byte to indicate that the directory entry corresponding to a file / directory is exclusively recorded in a single sector.

Description

technical field [0001] The present invention relates to the technical field of the file system, in particular to a directory entry system and its method applied to a file system without recovery. Background technique [0002] Due to the rapid evolution of semiconductor technology, more transistors can be accommodated in the same area. As a result, the functions of electronic products are enhanced compared to the past, and at the same time, the sizes of electronic products are all evolving toward lightness, thinness, and smallness. Due to the evolution of semiconductor technology, the capacity of single-package NAND flash memory continues to increase. Therefore, the memory capacity of the handheld MP3 player (MP3 player) using NAND flash memory is also increasing rapidly. For the convenience of downloading songs in MP3 format under different platforms, a FAT32 file system is generally built in a handheld MP3 player. [0003] figure 1 Display the directory entry recorded b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30G06F12/02
Inventor 乔梦麟
Owner SUNPLUS TECH CO LTD