Invalid data erasing method, device and system

A technology of invalid data and valid data, applied in the field of storage, can solve the problem that the information leakage of deleted data cannot be guaranteed, and achieve the effect of protecting safe information

Inactive Publication Date: 2012-08-01
HUAWEI DIGITAL TECH (CHENGDU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the inventor found that in the prior art, when the user needs to write new data at a specified address to overwrite the original data, or to delete the data at the specified location, only the mapping relationship between the logical address and the physical address of the data is cleared. The information to the user indicates that the original data has been overwritten or deleted, but in essence, the original data still exists, and the data can be read by professional and technical personnel, so the existing technology cannot guarantee that the deleted data information will not be leaked

Method used

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  • Invalid data erasing method, device and system
  • Invalid data erasing method, device and system

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0020] see figure 1 , the embodiment of the present invention provides a method for erasing invalid data, comprising:

[0021] Step 10: receiving invalid data erasure instruction information;

[0022] Wherein, the "invalid data erasure" in this embodiment means that the user needs to erase invalid data from the storage medium. It should be noted that the "delete" mentioned in the embodiment of the present invention is an operation on the user level. The erasure described in the embodiment of the present invention is an operation at the storage medium level, and the d...

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Abstract

The embodiment of the invention provides an invalid data erasing method, device and system. Through the embodiment of the invention, after invalid data erasing instruction information is received, a dirty data recovery procedure is started immediately so as to erase all invalid data, so that all the invalid data can be erased from a memory medium, thereby effectively protecting the safety information of users.

Description

technical field [0001] The invention relates to the technical field of storage, in particular to a method, device and system for erasing invalid data. Background technique [0002] A solid state drive (Solid State Drive), also known as an electronic hard disk or a solid state electronic disk, is a hard disk composed of a control unit and a solid state storage unit (usually a NAND FLASH chip). Different from the traditional disk writing process, SSD can perform multiple read operations after writing data, but before performing data writing, the location must be erased first, and then new data can be written. [0003] In order to avoid the impact of frequent execution of erasing operations on the life of the SSD, and the removal of valid data each time the data is erased, therefore, in the prior art, when the SSD performs a write operation, it usually stores data at a new physical address. The unit writes new data instead of writing new data in the original address after eras...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/14
CPCG06F12/14G06F12/0246G06F2212/1052G06F2212/7205
Inventor 高志宏李科杨琴琴
Owner HUAWEI DIGITAL TECH (CHENGDU) CO LTD
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