Information recording medium

一种记录介质、信息记录的技术，应用在输入/输出到记录载体、仪器、电数字数据处理等方向，能够解决不能够改变、短重写寿命等问题，达到减少重写操作的次数、避免可用年限的减少的效果

Active Publication Date: 2009-04-22
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The problem to be solved by the present invention is that, in the case where it is not possible to change the number of spare blocks previously prepared in a semiconductor memory card or to perform swap processing in memory blocks divided into a plurality of groups, information containing information to be frequently updated Any block in a block group has a shorter rewrite lifetime than any block in another group

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0051] figure 1 The recording medium of the nonvolatile semiconductor, the recording format of the medium, and the recording method of the medium according to the preferred embodiment 1 of the present invention are shown. refer to figure 1 Of the reference symbols shown, 100 denotes a partition management information area, 110 denotes a swap area, 120 denotes a partition boot information area, 130 denotes a file management information area, and 140 denotes a user data area. The partition management information area 110, which is also called a master boot record, includes information such as a start location, a size and type of a partition existing in a recording medium, a code to read an activation code from a partition, and the like. The partition boot information area 120, also called a partition boot record, includes various information in partitions and activation codes. The file management information area 130 includes file management information based on the file sys...

Embodiment approach 2

[0069] Next, a nonvolatile semiconductor recording medium in which a swap area is secured in a partition, a recording format of the medium, and a recording method of the medium will be described. The format within a partition depends on the type of file system. Preferred Embodiment 2 according to the present invention is described below with reference to the FAT file system.

[0070] image 3 A nonvolatile semiconductor recording medium, a recording format of the medium, and a recording method of the medium according to Preferred Embodiment 2 are shown. refer to image 3 Of the reference numerals shown, 700 denotes a partition management information area, 720 denotes a partition boot information area, 710 denotes a swap area, 730 denotes a file management information area, and 740 denotes a user data area. These areas and reference figure 1 The areas described are the same.

[0071] Next, refer to Figure 4 The allocation example is shown to describe how to allocate the...

Embodiment approach 3

[0080] Next, a nonvolatile semiconductor recording medium in which a swap area is obtained in a user data area in a partition, a recording format of the medium, and a recording method of the medium are described. The format within a partition depends on the type of file system. Preferred Embodiment 3 of the present invention is described below with reference to the FAT file system.

[0081] Figure 5 A nonvolatile semiconductor recording medium, a recording format of the medium, and a recording method of the medium according to the present invention are shown. refer to Figure 5 Of the reference numerals shown, 900 denotes a partition management information area, 920 denotes a partition guide information area, 930 denotes a file management information area, 940 denotes a user data area, and 910 denotes a swap area. These areas and reference figure 1 The areas described are the same. exist Figure 5 , the swap area 910 is reserved in the user data area 940 .

[0082] Ne...

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PUM

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Abstract

It is possible to solve the problem that a memory block of a group containing information frequently updated quickly reaches the rewrite service life end when the number of spare blocks prepared in a non-volatile semiconductor recording medium cannot be modified or when the memory block is divided into a plurality of groups so as to be processed alternately. The non-volatile semiconductor recording medium includes a partition management information area and a partition area. Partition area start position information is recorded in the partition management information area. The start position information contains a value assuring a predetermined area between the end of the partition management information area and the head of the partition area. The area assured between the end of the partition management information area and the head of the partition area is set to a state where data is physically erased.

Description

technical field [0001] The present invention relates to a nonvolatile semiconductor recording medium and a method of recording information in the medium. Background technique [0002] In recent years, a semiconductor memory card built with a nonvolatile semiconductor recording medium capable of electronically recording and erasing data and retaining data even after power failure has been widely used. Since this card requires a smaller number of mechanically active parts than conventional tape media and magnetic disk media, devices for recording and reproducing data with respect to this semiconductor memory card can be constructed to reduce size, weight, and occurrence of mechanical failure. Storage elements have increasingly larger capacities and higher recording / reproducing rates, and such semiconductor memory cards are beginning to be used in image and audio recording applications. [0003] Information such as audio and images recorded in such a semiconductor memory card ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/00G06F12/16G06F3/06G06F12/02
CPCG06F3/0644G06F2212/7211G06F3/0679G06F2212/1036G06F3/0616G06F12/0246
Inventor 冈田孝文石田景一斋藤浩
Owner PANASONIC CORP
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