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Information recording medium

A technology for recording media and information recording, applied in the direction of input/output to record carriers, instruments, electrical digital data processing, etc., can solve the problems of short rewrite life and inability to change, so as to reduce the number of rewrite operations and avoid The effect of the reduction in useful life

Active Publication Date: 2007-02-07
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
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Embodiment approach 1

[0051] figure 1 A recording medium of a nonvolatile semiconductor, a recording format of the medium, and a recording method of the medium according to the preferred embodiment 1 of the present invention are shown. refer to figure 1 In the reference numerals shown, 100 represents the partition management information area, 110 represents the swap area, 120 represents the partition boot information area, 130 represents the file management information area, and 140 represents the user data area. The partition management information area 110, also referred to as the master boot record, includes information such as the start position, the size and type of the partition present in the recording medium, the code to read the activation code from the partition, and the like. The partition boot information area 120, also referred to as the partition boot record, includes various information in the partition and activation codes. The file management information area 130 includes file ...

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, the nonvolatile semiconductor recording medium in which the swap area is obtained in the user data area in the partition, the recording format of the medium, and the recording method of the medium are described. The format within the partition depends on the type of file system. The preferred embodiment 3 of the present invention will be 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 In the reference numerals shown, 900 designates a partition management information area, 920 designates a partition boot information area, 930 designates a file management information area, 940 designates a user data area, and 910 designates a swap area. These areas and references figure 1 The areas described are the same. exist Figure 5 In the user data area 940, the swa...

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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, semiconductor memory cards with built-in nonvolatile semiconductor recording media, which can electronically record and erase data and retain data even after a power failure, have been widely used. Since such cards require a smaller number of mechanical moving parts than conventional tape media and magnetic disk media, devices for recording and reproducing data with respect to such semiconductor memory cards can be constructed to reduce size, weight and occurrence of mechanical failures. 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 semiconductor memory cards are gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/00G06F12/16G06F3/06G06F12/02
CPCG06F2212/1036G06F3/0679G06F3/0616G06F2212/7211G06F3/0644G06F12/0246
Inventor 冈田孝文石田景一斋藤浩
Owner PANASONIC CORP
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