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Method, device and system for obliterating data

A technology for erasing data and data, applied in the field of storage and information, to achieve the effect of ensuring security

Active Publication Date: 2009-06-24
CHENGDU HUAWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In special cases, it is particularly important to destroy data quickly and efficiently to ensure data security, but currently there is no method for quickly and efficiently destroying or overwriting data stored in SSDs with high-speed data

Method used

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  • Method, device and system for obliterating data
  • Method, device and system for obliterating data
  • Method, device and system for obliterating data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 of the present invention provides a method for erasing solid state disk SSD data, referring to figure 2 , the method includes the following steps:

[0029] Step 101, the flash memory controller receives a data destruction command;

[0030] Step 102, the flash memory controller distributes the received data destruction command to each layer of the flash memory chip;

[0031] Step 103, each layer of the flash memory chip erases the data in this layer in parallel according to the data destruction command.

[0032] The method may further include: step 104, covering new data on each layer of the flash memory chip where data erasing has been performed. The way to overwrite the new data can be to set "0" and "1" for each layer in the flash memory chip, and set the data in the flash memory chip to "0", "1", or "0" and "1". "The combination.

[0033] Wherein, receiving the data destruction command in step 101 may be: when the solid state disk is in the online s...

Embodiment 2

[0039] This embodiment provides a method for erasing data in a solid-state disk SSD, which can start all layers of the flash memory in the entire disk to concurrently perform bypass (Bypass) erasure; and overwrite new data according to electrical characteristics. Referring to 3, the method specifically includes the following steps:

[0040] In step 201, the SSD controller of the solid state disk receives a data destruction command.

[0041] When the solid-state disk SSD is in the online state, the SSD controller receives a data destruction command from the host; or, when the solid-state disk SSD is in the offline state, the SSD controller receives the data destruction command sent by the destroy switch.

[0042] In order for the SSD controller to be able to receive the data destruction command sent by the destroy switch when the SSD controller is offline, a power supply unit can be set for the SSD controller, which is responsible for waking up the SSD when it is offline and ma...

Embodiment 3

[0056] refer to Figure 5 , the embodiment of the present invention provides a device 300 for erasing solid state hard disk data, including:

[0057] a receiving unit 310, configured to receive a data destruction command;

[0058] The distribution unit 320 is configured to distribute the data destruction command received by the receiving unit 310 to each layer of the flash memory chip;

[0059] The erasing operation unit 330 is configured to erase the data of each layer of the flash memory chip in parallel according to the data destruction command distributed by the distribution unit 320 .

[0060] Wherein, the device 300 includes a plurality of erasing operation units 330, each erasing operation unit 330 is responsible for erasing the data of a layer in the flash memory chip, and each erasing operation unit 330 distributes the data according to the distribution unit 320 received by it. , performing data destruction operations independently, and erasing the data of the layer...

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Abstract

The invention discloses a method for obliterating data in a solid state disk, which comprises the following steps: data destroying commands are received; the received data destroying commands are dispatched to each layer of a flash memory chip; and each layer of the flash memory chip obliterates the data in the layer according to the data destroying commands. The invention further provides a corresponding device and a system. The invention adopts that the commands for data obliterating operation are obliterated to each layer of the solid state disk, so that data stored in the solid state diskcan be quickly obliterated, thereby ensuring the security of the data stored in the solid state disk.

Description

technical field [0001] The invention relates to the field of storage and information technology, in particular to a method, device and system for erasing data. Background technique [0002] Solid State Disk (SSD) is a hard disk composed of a control unit and a solid state storage unit (DRAM or FLASH chip). The interface specifications and definitions, functions, and usage methods of solid-state hard disks are the same as those of ordinary hard disks, and they do not have mechanical rotating devices. Therefore, SSDs have the advantages of high read and write performance, strong shock resistance, and low power consumption, and are widely used in military, Vehicle, industrial control, video surveillance, network surveillance, network terminal, electric power, medical, aviation, etc., navigation equipment and other fields. [0003] A flash-based solid-state drive uses a FLASH chip as a storage medium. In flash memory-based solid-state drives, storage cells in flash memory are ...

Claims

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Application Information

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IPC IPC(8): G11C16/10G11C7/10
Inventor 柯乔刘明刚
Owner CHENGDU HUAWEI TECH
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