Data memory device and method for initializing same

A technology of a data storage device and an initialization method, which is applied in the field of initialization and can solve problems such as the decline in file writing efficiency

Inactive Publication Date: 2009-05-27
BUFFALO CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the practice of recording management information separately for the two file allocation tables will become the main cause of the decline in file writing efficiency.
This problem is not limited to the FAT file system, and the same problem exists in data storage devices using other file systems that need to record two management tables with the same content.

Method used

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  • Data memory device and method for initializing same
  • Data memory device and method for initializing same
  • Data memory device and method for initializing same

Examples

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Deformed example 1

[0073] In the above-mentioned embodiments, the data storage device 10 has a flash memory as a storage device. In contrast, other storage devices, such as hard disk drives or rewritable optical discs, may also be used.

Deformed example 2

[0075] In the above-described embodiments, the data storage device 10 is formatted according to the FAT format. However, the format is not limited to this, and may be formatted according to other formats in which a plurality of management tables with the same content are written.

Deformed example 3

[0077] In the above-mentioned embodiments, the host device 20 and the data storage device 10 are connected through a USB interface. However, the interface type is not limited to this. For example, it may be connected through a PCMCIA interface, or may be connected through a Serial ATA interface, an IEEE1394 interface, or the like.

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Abstract

A data memory device is provided with a USB connector, a USB control circuit, a flash controller and a flash memory. When format processing is carried out by a host device, the flash controller forcibly rewrites a FAT number data recorded in a bios parameter product region from ''2'' to ''1'' at a power source resetting-up time. With this, since the existence of only one FAT region is recognized from the host device, the efficiency of writing data can be improved in the data memory device where a plurality of managing tables are generated by format processing from the host device.

Description

technical field [0001] The present invention relates to an initialization technique of a data storage device storing data transferred from a host device. Background technique [0002] As a storage device for storing data transferred from a host device such as a computer, there are various devices such as a hard disk drive, a memory card, or a USB flash memory. A file system called FAT is generally used as a file system applied to these storage devices. In the initialization (formatting) process based on this FAT file system, a management table called a file allocation table is stored in the data storage device. In the file allocation table, for each file to be managed, management information indicating the cluster structure and storage location of the file is recorded. [0003] As mentioned above, very important information is recorded in the file allocation table. Therefore, the host device usually stores two file allocation tables with the same content in the data stora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/00
CPCG06F3/0643G06F3/0679G11C16/349G06F3/061
Inventor 荒川忠史
Owner BUFFALO CORP LTD
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