CN103956172B - Hard disk and its demagnetization method and degaussing gear - Google Patents
Hard disk and its demagnetization method and degaussing gear Download PDFInfo
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- CN103956172B CN103956172B CN201410124207.XA CN201410124207A CN103956172B CN 103956172 B CN103956172 B CN 103956172B CN 201410124207 A CN201410124207 A CN 201410124207A CN 103956172 B CN103956172 B CN 103956172B
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- magnetic signal
- hard disk
- control module
- circuit
- disk
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Abstract
The embodiment of the present invention provides a kind of hard disk and its demagnetization method and degaussing gear.In the internal structure of hard disk of the present invention, the circuit for producing magnetic signal is set at least partition between disk, the circuit of the generation magnetic signal is electrically connected with the SOC in circuit board, and the magnetic signal that SOC controls produce the circuit evolving of magnetic signal is used for the direction for changing magnetic signal on disk.The embodiment of the present invention produces the circuit of magnetic signal by being set on partition, when to the power on circuitry of the generation magnetic signal, realizes the quick erasing of data storage in hard disk；Compared to prior art, without professional environment, it is powered and can be achieved, it is easy to operate.
Description
Technical field
The present embodiments relate to information security technology, more particularly to a kind of hard disk and its demagnetization method and degaussing gear.
Background technology
With the development of the communication technology, information security receives much concern.And hard disk is as one of main medium of storage information,
It is also that information security pays close attention to object.When hard disk corruptions or when scrapping, in order to ensure that individual privacy or confidential data are not let out
Dew, need to first destroy the information of storage.
In the prior art, include for the effective method of destruction of data in hard disk：Specialty demagnetization machine, chemical medicinal liquid and
Data are write to hard disk.But data in hard disk is destroyed using prior art, at least there is following defect：
1）Need the environment of specialty（The data dump equipment or chemical medicinal liquid of specialty）, but professional environment is not easy acquisition,
And professional environment is expensive；
2）If writing data to hard disk using magnetic head, the stand-by period is destroyed longer.
The content of the invention
The present invention provides a kind of hard disk and its demagnetization method and degaussing gear, to realize number in easily and fast erasing hard disk
According to.
In a first aspect, the present invention, which is provided, sets an electricity for producing magnetic signal at least partition between a kind of hard disk, disk
Road, the circuit of the generation magnetic signal is electrically connected with the on-chip system SOC in circuit board, the SOC controls generation magnetic letter
Number the magnetic signal of circuit evolving be used to change the direction of magnetic signal on the disk.
With reference in a first aspect, in the first possible implementation of first aspect, the circuit for producing magnetic signal
For a coil, the magnetic field intensity generated after the coil electricity is enough to change the direction of magnetic signal on the disk.
With reference to the first possible implementation of first aspect or first aspect, second in first aspect is possible
In implementation, in addition to：
Heating coil, is arranged on the disk and/or the partition, is heated for the inside to the hard disk；
Current control module, is arranged on the circuit board, and the first end of the current control module is electrically connected with the SOC
Connect, the second end of the current control module is electrically connected with the heating coil, the 3rd end of the current control module and institute
State the circuit electrical connection for producing magnetic signal.
With reference to second of possible implementation of first aspect, in the third possible implementation of first aspect
In, when the internal temperature that the current control module detects the hard disk reaches preset temperature, control the heating coil
Stop heating.
With reference to first aspect, first aspect the first into the third possible implementation any one, first
In 4th kind of possible implementation of aspect, in addition to：
User's control module, is electrically connected with the SOC, the trigger action for receiving user, and by the trigger action
Corresponding pass down the line gives the SOC, so that the SOC controls circuit for producing magnetic signal carries out data wiping to hard disk
Remove, wherein, the trigger action, which includes button, to be triggered and command triggers.
Second aspect, the present invention is by a kind of hard disk demagnetization method, and methods described includes：
Hard disk receives the trigger action of user, and the trigger action, which includes button, to be triggered and command triggers；
The circuit evolving magnetic signal of set generation magnetic signal on on-chip system SOC control partitions in the hard disk,
The magnetic signal is used for the direction for changing magnetic signal on disk.
With reference to second aspect, in the first possible implementation of second aspect, SOC in hard disk control every
The circuit evolving magnetic signal of set generation magnetic signal on piece, including：
The SOC control electric currents control module regulation circuit for producing magnetic signal in the hard disk generates magnetic signal
Magnetic field intensity.
With reference to the first possible implementation of second aspect, in second of possible implementation of second aspect
In, the SOC control electric currents control module regulation circuit for producing magnetic signal in the hard disk generates the magnetic field of magnetic signal
Intensity, including：
SOC control electric currents control module in the hard disk adjusts the internal temperature of the hard disk；
If it is determined that when the internal temperature of the hard disk reaches preset temperature, the current control module control heating coil stops
Only heat.
The third aspect, the present invention is by a kind of hard disk degaussing gear, and described device includes：
Receiving module, the trigger action for receiving user, the trigger action, which includes button, to be triggered and command triggers；
Control module, the circuit evolving magnetic signal for controlling generation magnetic signal set on partition, the magnetic signal
Direction for changing magnetic signal on disk.
With reference to the third aspect, in the first possible implementation of the third aspect, the control module specifically for：
The control electric current control module regulation circuit for producing magnetic signal generates the magnetic field intensity of magnetic signal.
With reference to the first possible implementation of the third aspect, in second of possible implementation of the third aspect
In, the control module is further used for：
Control electric current control module adjusts the internal temperature of the hard disk；
If it is determined that when the internal temperature of the hard disk reaches preset temperature, control heating coil stops heating.
The present invention produces the circuit of magnetic signal by being set on partition, when to the power on circuitry of the generation magnetic signal,
Realize the quick erasing of data storage in hard disk；Compared to prior art, without professional environment, it is powered and can be achieved, operation side
Just.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to do one simply to introduce, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of hard disk in the prior art；
Fig. 2 is the structural representation of hard disk embodiment one of the present invention；
Fig. 3 is position relationship schematic diagram between partition and disk in hard disk embodiment one of the present invention；
Fig. 4 is spacer structure schematic diagram in hard disk embodiment two of the present invention；
Fig. 5 is the structural representation of hard disk embodiment three of the present invention；
Fig. 6 is the flow chart of hard disk demagnetization method embodiment one of the present invention；
Fig. 7 is the structural representation of hard disk degaussing gear embodiment one of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Hard disk provided in an embodiment of the present invention, the difference with existing hard disk in structure is：Between disk at least one every
On-chip system in one circuit for producing magnetic signal, the circuit and circuit board of the generation magnetic signal is set on piece（System on a
Chip, referred to as：SOC）Electrical connection, the magnetic signal that SOC controls produce the circuit evolving of magnetic signal is used to change magnetic signal on disk
Direction.
Wherein, Fig. 1 is the structural representation of hard disk in the prior art.Fig. 2 shows for the structure of hard disk embodiment one of the present invention
It is intended to.
With reference to Fig. 1 and Fig. 2.In specific hard drive internal structure, hard drive internal is by cephali disc assembly and circuit board 10
Composition, wherein, cephali disc assembly is the core of hard disk, is arranged on pedestal 20, cephali disc assembly include disk 21, main shaft 22,
Read-write head 23 and the grade critical piece of magnetic arm 25, the wherein number of disk 21 are one or more, are the carrier of data storage, dish
By partition between piece 21（It is not shown）Separate, the main shaft 22 positioned at the centre of each disk 21, for driving disk 21 to do height
Speed rotation；SOC11, voice coil motor are provided with circuit board 10（Voice Coil Motor, referred to as：VCM）12nd, buffer 13,
Read channel 14, temperature sensor 15 and HPI 16, wherein, SOC11 controls the action of hard drive internal component, is connect by main frame
Mouth 16 is contacted with the external world, wherein, HPI can be serial connecting small computer system interface（Serial Attached
Small Computer System Interface, referred to as：SAS）Or Serial Advanced Technology Attachment（Serial Advanced
Technology Attachment, referred to as：SATA）Interface etc.；VCM12 is in permanent magnet（It is not shown）In the magnetic field of generation, lead to
The size for changing its internal direct current electric current is crossed, the action of magnetic arm 25 is controlled, and drive read-write head 23 to carry out dish by magnetic arm 25
The read-write of data in piece 21.
Specifically, in hard disk, the position relationship of partition and disk is as shown in figure 3, with 2 disks compositions in the embodiment
Illustrated exemplified by hard disk, but the number of disk is not limited to 2.In figure 3, main shaft 31 is arranged on pedestal 30, disk 32 it
Between be provided with partition 32.The hard disk that the present invention is provided, i.e., set up the circuit for producing magnetic signal on partition 32（That is marked in Fig. 2
For 26 parts, the circuit 26 of the generation magnetic signal generates magnetic signal by VCM12 controls during energization, and the magnetic signal is used to change dish
The direction of original magnetic signal on piece）, realize the erasing of data storage in hard disk.
The embodiment of the present invention produces the circuit of magnetic signal by being set on partition, leads in the circuit to the generation magnetic signal
When electric, the quick erasing of data storage in hard disk is realized；Compared to prior art, without professional environment, it is powered and can be achieved, behaviour
Facilitate.
In the above-described embodiments, the circuit for producing magnetic signal can be a coil, and the magnetic field generated after the coil electricity is strong
Degree is enough to change the direction of magnetic signal on disk.For example, as shown in figure 4, on partition 40 set coil 41, wherein, to coil 41
Coil number, coil thickness etc. do not limit, the magnetic field intensity that coil 41 is generated after being powered, which is enough to destroy on disk, to be stored
Data.
Further, on the basis of embodiment illustrated in fig. 2, as shown in figure 5, hard disk can also include the He of heating coil 27
Current control module 17, wherein, heating coil 27 is arranged on disk 21, is heated for the inside to hard disk；Electric current control
Molding block 17 is set on the circuit board 10, and the first end of current control module 17 is electrically connected with SOC11, current control module 17
Second end is electrically connected with heating coil 27, and the 3rd end of current control module 17 is electrically connected with producing the circuit 26 of magnetic signal.Need
It is noted that particular location of the heating coil 27 on disk 21 be not to influence data storage to be excellent, for example, heating coil 27
It is arranged on marginal position of disk 21 etc..Alternatively, heating coil 27 can also be arranged on partition（It is not shown）On.
On the basis of the above, when the internal temperature that current control module 17 detects hard disk reaches preset temperature, control
Heating coil 27 stops heating.The preset temperature is pre-set according to actual demand, for example, can be 80 ° etc..
Alternatively, hard disk can also include user's control module 18, be electrically connected with SOC11, the triggering for receiving user
Operation, and by the corresponding pass down the line of the trigger action to SOC11, so that 26 pairs of the circuit that SOC11 controls produce magnetic signal is hard
Disk carries out data erasing, wherein, the trigger action may include button triggering and command triggers.
Specifically, the order of quick formatting is increased in hard disk, when user needs what is stored in quick formatting hard disk
During data, pass through transmitting order to lower levels so that produce the power on circuitry of magnetic signal, produce magnetic signal, the magnetic signal causes dish in hard disk
Piece rotates, so that orderly magnetic signal all on disk quickly is changed into no sequential signal, realizes to data storage in hard disk
Erasing.
Fig. 6 is the flow chart of hard disk demagnetization method embodiment one of the present invention.The embodiment of the present invention provides a kind of hard disk demagnetization
Method, this method is used to wipe the data that hard disk in any of the above-described embodiment is stored.This method can have hard disk to disappear
Magnetic device is performed, and the device can be integrated in PC（Personal Computer, referred to as：PC）, it is notebook computer, flat
Plate computer or personal digital assistant（Personal Digital Assistant, referred to as：PDA）Deng in terminal device.Such as Fig. 6 institutes
Show, this method includes：
S601, hard disk receive the trigger action of user, and the trigger action, which includes button, to be triggered and command triggers.
The circuit evolving magnetic signal of set generation magnetic signal, the magnetic signal on SOC control partitions in S602, hard disk
Direction for changing magnetic signal on disk.
In the state of ideal, when externally-applied magnetic field is more than the coercivity of magnetic-based storage media, the small magnetic of magnetic-based storage media
The direction of magnetization of body just should be consistent with the direction of externally-applied magnetic field, and reaches the saturation magnetization of the magnetic material, when additional
After magnetic field is removed, the direction of small magnet and magnetic field intensity are just secured.If the original direction of magnetization and externally-applied magnetic field of small magnet
Direction it is inconsistent, will overturn, change its direction of magnetization, also just reach the purpose of demagnetization.
The embodiment of the present invention utilizes the circuit for being set on above-mentioned principle, the partition in hard disk and producing magnetic signal, works as user
When data storage in hard disk is destroyed in triggering, by the power on circuitry that SOC is the generation magnetic signal, it is set to generate magnetic signal, to change
Become the direction of original magnetic signal on disk.
The embodiment of the present invention controls the circuit evolving magnetic signal of the generation magnetic signal on partition by SOC, to being deposited in hard disk
Storage data are wiped, compared to the method that prior art destroys data using demagnetizer and liquid medicine etc., without special data
Equipment is removed, is realized simple and convenient；Data are write to hard disk using magnetic head compared to prior art, data are quickly wiped, destroy etc.
Treat that the time is short.
On the basis of the above, S602 can be specifically included：SOC control electric currents control module regulation in hard disk produces magnetic letter
Number circuit generate the magnetic field intensity of magnetic signal.Alternatively, the SOC control electric currents control module regulation generation in hard disk
The magnetic field intensity that the circuit of magnetic signal generates magnetic signal is specially：SOC control electric currents control module regulation hard disk in hard disk
Internal temperature；If it is determined that when the internal temperature of hard disk reaches preset temperature, current control module control heating coil stops adding
Heat.
Fig. 7 is the structural representation of hard disk degaussing gear embodiment one of the present invention.As shown in fig. 7, hard disk degaussing gear 70
Including：Receiving module 71 and control module 72.Wherein, receiving module 71 is used for the trigger action for receiving user, the trigger action
Including button triggering and command triggers；Control module 72 is used to control the circuit evolving magnetic of generation magnetic signal set on partition
Signal, the magnetic signal is used for the direction for changing magnetic signal on disk.
The device of the present embodiment, can be used for the technical scheme for performing embodiment of the method shown in Fig. 6, its realization principle and skill
Art effect is similar, and here is omitted.
On the basis of above-described embodiment, control module 72 can produce magnetic letter specifically for the regulation of control electric current control module
Number circuit generate the magnetic field intensity of magnetic signal.Alternatively, control module 72 can be further used for control electric current control module
Adjust the internal temperature of hard disk；If it is determined that when the internal temperature of hard disk reaches preset temperature, control heating coil stops heating.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (5)
1. a kind of hard disk a, it is characterised in that circuit for producing magnetic signal, the generation are set at least partition between disk
The circuit of magnetic signal is electrically connected with the on-chip system SOC in circuit board, the SOC controls circuit evolving for producing magnetic signal
Magnetic signal be used to change the direction of magnetic signal on the disk；
The hard disk also includes heating coil, and the heating coil is arranged on the marginal position of the disk or the partition, uses
Heated in the inside to the hard disk；
Current control module, is arranged on the circuit board, and the first end of the current control module is electrically connected with the SOC,
Second end of the current control module is electrically connected with the heating coil, the 3rd end and the production of the current control module
The circuit electrical connection of magnetisation signal；When the internal temperature that the current control module detects the hard disk reaches preset temperature
When, control the heating coil to stop heating.
2. hard disk according to claim 1, it is characterised in that the circuit of the generation magnetic signal is a coil, the line
The magnetic field intensity that circle is generated after being powered is enough to change the direction of magnetic signal on the disk.
3. hard disk according to claim 1 or 2, it is characterised in that also include：
User's control module, is electrically connected with the SOC, the trigger action for receiving user, and the trigger action is corresponding
Pass down the line give the SOC so that the SOC control it is described produce magnetic signal circuit to hard disk carry out data erasing, its
In, the trigger action, which includes button, to be triggered and command triggers.
4. a kind of hard disk demagnetization method, it is characterised in that methods described includes：
Hard disk receives the trigger action of user, and the trigger action, which includes button, to be triggered and command triggers；
The circuit evolving magnetic signal of set generation magnetic signal, described on on-chip system SOC control partitions in the hard disk
Magnetic signal is used for the direction for changing magnetic signal on disk；
The circuit evolving magnetic signal of set generation magnetic signal on SOC control partitions in the hard disk, including：
The SOC control electric currents control module regulation circuit for producing magnetic signal in the hard disk generates the magnetic field of magnetic signal
Intensity；
The SOC control electric currents control module regulation circuit for producing magnetic signal in the hard disk generates the magnetic field of magnetic signal
Intensity, including：
SOC control electric currents control module in the hard disk adjusts the internal temperature of the hard disk；
If it is determined that when the internal temperature of the hard disk reaches preset temperature, the current control module control heating coil stops adding
Heat；
Wherein, the heating coil sets the marginal position of the disk or the partition.
5. a kind of hard disk degaussing gear, it is characterised in that described device includes：
Receiving module, the trigger action for receiving user, the trigger action, which includes button, to be triggered and command triggers；
Control module, the circuit evolving magnetic signal for controlling generation magnetic signal set on partition, the magnetic signal is used for
Change the direction of magnetic signal on disk；
The control module specifically for：The control electric current control module regulation circuit for producing magnetic signal generates magnetic signal
Magnetic field intensity；
The control module is further used for：Control electric current control module adjusts the internal temperature of the hard disk；
If it is determined that when the internal temperature of the hard disk reaches preset temperature, control heating coil stops heating；
Wherein, the heating coil sets the marginal position of the disk or the partition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410124207.XA CN103956172B (en) | 2014-03-28 | 2014-03-28 | Hard disk and its demagnetization method and degaussing gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410124207.XA CN103956172B (en) | 2014-03-28 | 2014-03-28 | Hard disk and its demagnetization method and degaussing gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103956172A CN103956172A (en) | 2014-07-30 |
| CN103956172B true CN103956172B (en) | 2017-11-07 |
Family
ID=51333438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410124207.XA Expired - Fee Related CN103956172B (en) | 2014-03-28 | 2014-03-28 | Hard disk and its demagnetization method and degaussing gear |
Country Status (1)
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| CN (1) | CN103956172B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782619B (en) * | 2016-11-11 | 2019-05-31 | 中国农业银行股份有限公司 | Mechanical hard disk and its control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1805015A (en) * | 2005-01-14 | 2006-07-19 | 日立环球储存科技荷兰有限公司 | Hardware driver and recording method |
| CN1860540A (en) * | 2003-10-02 | 2006-11-08 | 皇家飞利浦电子股份有限公司 | Control means and method of controlling a current through a coil |
| CN101059961A (en) * | 2006-04-21 | 2007-10-24 | 日立环球储存科技荷兰有限公司 | Method for utilizing a bulk erase tool to erase perpendicularly recorded media |
| CN101331467A (en) * | 2005-10-20 | 2008-12-24 | 恩斯康斯数据处理技术公司 | Hard drive eraser |
| US7706102B1 (en) * | 2006-08-14 | 2010-04-27 | Lockheed Martin Corporation | Secure data storage |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8064183B2 (en) * | 2009-06-01 | 2011-11-22 | Olliges William E | Capacitor based bi-directional degaussing device with chamber |
-
2014
- 2014-03-28 CN CN201410124207.XA patent/CN103956172B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1860540A (en) * | 2003-10-02 | 2006-11-08 | 皇家飞利浦电子股份有限公司 | Control means and method of controlling a current through a coil |
| CN1805015A (en) * | 2005-01-14 | 2006-07-19 | 日立环球储存科技荷兰有限公司 | Hardware driver and recording method |
| CN101331467A (en) * | 2005-10-20 | 2008-12-24 | 恩斯康斯数据处理技术公司 | Hard drive eraser |
| CN101059961A (en) * | 2006-04-21 | 2007-10-24 | 日立环球储存科技荷兰有限公司 | Method for utilizing a bulk erase tool to erase perpendicularly recorded media |
| US7706102B1 (en) * | 2006-08-14 | 2010-04-27 | Lockheed Martin Corporation | Secure data storage |
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|---|---|
| CN103956172A (en) | 2014-07-30 |
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