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A data erasing method for a western digital hard disk defect table

A Western Digital hard disk and data erasure technology, which is applied in the field of data erasure of Western Digital hard disk defect tables, can solve the problems of inoperable hard disk firmware areas and hidden shielding areas, and achieve simple and effective erasing methods and simple and fast implementation methods Effect

Active Publication Date: 2019-05-07
INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The erasing machine on the existing market interacts with the Western Digital hard disk using the ATA protocol standard instruction set, and the standard instruction set cannot operate the hard disk firmware area and hidden shielding area
The standard instruction set of the ATA protocol can only read and write the user data area. For example, a 500GB Western Digital hard disk is recognized in the motherboard BIOS as 500G, so the existing erasing machine can only erase the partitions and partitions in the 500G space. Various data files, underlying code

Method used

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  • A data erasing method for a western digital hard disk defect table
  • A data erasing method for a western digital hard disk defect table
  • A data erasing method for a western digital hard disk defect table

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0037] The present invention first introduces the data distribution and description of the Western Digital mechanical hard disk.

[0038] 1. Hard disk partition

[0039] There are 11 places where there are data on the WD hard drive, namely: user data area, reserved area, used firmware area, unused firmware area, permanent defect table shielding area, growth defect table shielding area, firmware area defect table shielding area , segment mask area, unused disk mask area, NVRAM data area, and solid-state cache area. These 11 places are all readable and writable. However, the existing erasing machines on the market can only erase the user data area, and the data in the other 10 places cannot be erased. However, the present invention confirms through experiments that the data in other 10 locations can be erased with the factory-defined instruction set....

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Abstract

The invention relates to a data erasing method for a western digital hard disk defect table. The data erasing method is characterized by comprising the following steps: 1) erasing the permanent defecttable masking area in the Western Digital hard disk without using the P-List defect table; 2) erasing the growth defect table shielding area in the Western Digital hard disk without using the G-Listdefect table; 3) When erasing the firmware area defect table mask area in the Western Digital hard disk, enabling the hard disk to enter the factory mode, and then writing the specific data overlay into the corresponding firmware area track sector for erasing.. The data of different defect table areas of the Western digital hard disk is erased by customizing factory commands, the erasing method issimple and effective, and the method can be widely applied to the field of data erasing of non-used firmware areas of the Western digital hard disk.

Description

technical field [0001] The invention relates to a method for erasing data on a hard disk, in particular to a method for erasing data on a Western Digital hard disk defect list. Background technique [0002] According to a Kaspersky report in 2015 (https: / / www.ithome.com / html / it / 130313.htm), the US National Security Agency may have implanted viruses in the hard disk firmware. In this report, Kaspersky mentioned that many big-brand hard drives may be affected, and Western Digital hard drives are one of them. [0003] Since the virus is written into the hard disk firmware area and embedded in the hard disk firmware program, when the hard disk is powered on, the hard disk firmware program will automatically activate the virus and release the virus to the user area (the user area is the computer operation area). area accessible by the system). After the hard disk self-inspection is completed, the host computer can recognize the hard disk, and then the operating system can start...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/56G06F21/79G06F3/06
Inventor 赵露邢桂东康艳荣龙源楚川红张耀国
Owner INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
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