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Storage device

A storage device and storage area technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as security difficulties, and achieve the effect of preventing leakage accidents

Inactive Publication Date: 2014-06-04
GENUSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to improve security on storage devices that cannot understand the structure of the file system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] figure 1 It is a block diagram showing the configuration of the file system 11 and storage device 13 (sometimes referred to as an external disk, auxiliary storage device, data storage memory, etc. for the host system) related to the first embodiment of the present invention.

[0042] The computer not shown in the figure is composed of CPU, main memory, display and display interface, keyboard and keyboard interface, etc. The main memory has an operating system (OS) and application software (AS). The OS manages the execution of the AS, and consists of a core part that controls the display interface and keyboard interface and a user interface part. The OS and AS are located in the storage area 15 of the storage device 13, and are loaded into the main memory at startup. A computer having such a configuration is called a mainframe.

[0043] As part of the OS, includes the file system. As mentioned above, a file system manages and controls data (information) modules that ...

Embodiment 2

[0057] Below, with Figure 2-7 Example 2 of the present invention is shown. Components that are the same as those in Embodiment 1 are given the same reference numerals, and description thereof will be omitted. In this second embodiment, the file system 11 is FAT, and the storage area 15 is constituted by a nonvolatile semiconductor storage device. The controller / file system unit 18 is equipped with functions such as conversion between logical addresses and physical addresses, wear leveling, garbage collection, file system monitoring, and erasure.

[0058] The storage area 15 is composed of a plurality of flash memory chips 19 . The flash memory is composed of a plurality of blocks that can be erased as a whole at one time, and each erase block is composed of a plurality of pages written simultaneously. A flash memory chip 19, for example, has four banks, one bank has 16 blocks, and one bank has 4096 pages, each page is 2k bits, that is to say, consists of 128 words.

[005...

Embodiment 3

[0071] The block diagram of the storage device related to Embodiment 3 of the present invention is as Figure 8 shown. Components that are the same as in Embodiments 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. The storage device in the third embodiment of the present invention is that a battery 61 and a timer 62 are added to the storage device in the second embodiment. And, when the time specified by the timer is detected, the controller erases or writes the area corresponding to the file so that it cannot be restored.

[0072] With this configuration, forgetting to delete files can be effectively prevented, and leakage of confidential files can be prevented at a higher level.

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Abstract

A storage device is provided to really delete data using file as a unit on a storage device, and a file system structure of the storage device cannot be originally learned; the storage device refers to the storage device connected with a computer operating a file system (the file system arranges a data zone with many stored file content and a management zone managing the said files into a storage zone of the storage device). The storage device comprises the storage zone; a file system monitoring method detecting file system files deleting motion; and a control method. When the file system monitoring method deleting the files is detected, the zone in which the deleted file is located in the storage zone can be deleted or written in, so no replay can be carried out.

Description

technical field [0001] The present invention relates to a storage device, in particular to a running file system (the file system saves a data area for storing the contents of multiple files and a management area for managing the above-mentioned multiple files in the storage area of ​​the storage device) computer-attached storage device. Background technique [0002] A file system is software that manages and controls a variable-sized data (information) module called a file, stores it in a storage device such as a disk drive (auxiliary storage device), and reads it. In most cases, the file system is an integral part of the operating system. [0003] The file system defines attribute information such as file name, size, and date, allocation information such as which area of ​​the disk to store what, and the area where the data body is stored, respectively, and stores them in the storage area of ​​the storage device. Then, the file system processes these attribute informatio...

Claims

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Application Information

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IPC IPC(8): G06F21/79
CPCG06F3/062G06F16/162G06F16/1734G06F21/79G06F2221/2143
Inventor 笠靖
Owner GENUSION
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