CN107480012A - The data reconstruction method and data recovery system of a kind of solid state hard disc - Google Patents
The data reconstruction method and data recovery system of a kind of solid state hard disc Download PDFInfo
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- CN107480012A CN107480012A CN201710751544.5A CN201710751544A CN107480012A CN 107480012 A CN107480012 A CN 107480012A CN 201710751544 A CN201710751544 A CN 201710751544A CN 107480012 A CN107480012 A CN 107480012A
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- hard disc
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1469—Backup restoration techniques
Abstract
This application discloses a kind of data reconstruction method of solid state hard disc, including, according to the retention time of data in solid state hard disc, judge whether the data in the solid state hard disc are the recovery data for needing to perform data recovery operation；If so, then reading the recovery data, the recovery data are write in the solid state hard disc according to the address of reading.Pass through the judgement of the retention time to data, filter out the data for needing to recover, data are read out with the address for being written back reading, in the original location, just preserves certain amount of charge, clear operation is not now done to original electric charge, new electric charge is write simultaneously, supplements the charge number of leakage, it is possible to relatively low performance consumption, the operation of data recovery is completed, while excessive user performance will not be taken.Disclosed herein as well is a kind of data recovery system of solid state hard disc, has above-mentioned beneficial effect.
Description
Technical field
The application is related to field of computer technology, the data reconstruction method and data recovery of more particularly to a kind of solid state hard disc
System.
Background technology
With the development of computer technology, there are the technologies such as internet, cloud computing, Internet of Things, to human lives with
While to facilitate, the data and information of magnanimity can be produced.These substantial amounts of data and information are handled and stored, just
Need higher performance and desired stocking system.As technology develops, there is solid state hard disc, because its read or write speed is fast, energy consumption
It is relatively low, it is widely used.
But because making the material problem of solid state hard disc, many mistakes occur during NAND is used, wherein counting
It is relatively conventional one kind according to mistake is kept.The error reason of data retention failures is that caused electric charge is let out as time goes by
Leakage, after data write NAND, if for a long time without using the data of write-in, it may occur that the phenomenon of charge leakage, now if read
Go data, it may occur that the phenomenon of loss of data.
In general, prevent data from keeping the technology of error to be called dynamic refresh, be exactly that reading scanning periodically is carried out to data, such as
Fruit finds that error rate is higher, but within error correcting capability, corrects for mistake, writes data to new place.But so do
Three shortcomings, one is that amplification is write in increase, shortens the NAND life-spans, and another is that backstage read-write occupies other physics skies
Between, the pressure of garbage reclamation is added, have impact on the performance that user uses.The consumer level NAND high to power consumption requirements requirements in addition
When user does not read and write, NAND will dormancy, so scan data of also having no chance, if scanning increases work(by force
Consumption.
Therefore, the problem of data keep malfunctioning how is prevented, is that the focus of those skilled in the art's concern is asked
Topic.
The content of the invention
The purpose of the application is to provide a kind of data reconstruction method of solid state hard disc, passes through sentencing for the retention time to data
It is disconnected, the data for needing to recover are filtered out, data are read out with the address for being written back reading, in the original location, are just preserved
Certain amount of charge, clear operation is not now done to original electric charge, while writes new electric charge, supplement the charge number of leakage,
Can completes the operation of data recovery, while will not take excessive user performance with relatively low performance consumption.
In order to solve the above technical problems, the application provides a kind of data reconstruction method of solid state hard disc, including：
According to the retention time of data in solid state hard disc, judge whether the data in the solid state hard disc are that needs are held
The recovery data of row data recovery operation；
If so, then reading the recovery data, the recovery data are write into the solid state hard disc according to the address of reading
In.
Optionally, the retention time according to data in solid state hard disc, the data in the solid state hard disc are judged
Whether it is the recovery data for needing to perform data recovery operation, including：
The retention time of all data in the solid state hard disc is recorded, and all retention times are performed
Sorting operation, be maintained time-sequencing table；
Judge the retention time of the data whether in the preceding preset ratio of retention time sequencing table.
Optionally, it is described to read the recovery data, the recovery data are write into the solid-state according to the address of reading
In hard disk, including：
The recovery data are read, and judge whether the recovery is checked by ECC；
If so, then the recovery data are write in the solid state hard disc according to the address of reading；
If it is not, then selecting error correction algorithm to carry out correction process to the recovery data, obtain error correction and recover data；
The error correction is recovered into data to write in the solid state hard disc according to the address of reading.
Optionally, in addition to：
When the recovery data write the solid state hard disc, suggestion device is opened.
The application also provides a kind of data recovery system of solid state hard disc, including：
Recover data judge module, for the retention time according to data in solid state hard disc, judge in the solid state hard disc
The data whether be need perform data recovery operation recovery data；
Data recovery process module, for reading the recovery data, the recovery data are write according to the address of reading
Enter in the solid state hard disc.
Optionally, the recovery data judge module includes：
Data hold time sequencing unit, during for recording the holding of all data in the solid state hard disc
Between, and all retention times are performed into sorting operation, be maintained time-sequencing table；
Data hold time judging unit, for judging the retention time of the data whether in retention time sequence
In the preceding preset ratio of table.
Optionally, the data recovery process module includes：
Digital independent inspection unit, for reading the recovery data, and judge whether the recovery is checked by ECC；
Data write unit, the recovery data are write in the solid state hard disc for the address according to reading；
Correcting data error unit, for selecting error correction algorithm to carry out correction process to the recovery data, obtain error correction recovery
Data；
Error correction data writing unit, the solid-state is write according to the address of reading for the error correction to be recovered into data
In hard disk.
Optionally, in addition to：
Suggestion device, for being opened when the recovery data write the solid state hard disc.
A kind of data reconstruction method of solid state hard disc provided herein, including：According to the guarantor of data in solid state hard disc
The time is held, judges whether the data in the solid state hard disc are the recovery data for needing to perform data recovery operation；If so,
The recovery data are then read, write the recovery data in the solid state hard disc according to the address of reading.
By the judgement of the retention time to data, the data for needing to recover are filtered out, data are read out and are written back
The address of reading, in the original location, certain amount of charge is just preserved, clear operation is not now done to original electric charge,
New electric charge is write simultaneously, supplements the charge number of leakage, it is possible to relatively low performance consumption, complete the operation of data recovery, together
Shi Buhui takes excessive user performance.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of application, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of flow chart of the data reconstruction method for solid state hard disc that the embodiment of the present application provides；
Fig. 2 is a kind of flow for judging data manipulation of the data reconstruction method for solid state hard disc that the embodiment of the present application provides
Figure；
Fig. 3 is a kind of flow of the data recovery operation of the data reconstruction method for solid state hard disc that the embodiment of the present application provides
Figure；
Fig. 4 is a kind of structural representation of the data recovery system for solid state hard disc that the embodiment of the present application provides.
Embodiment
The core of the application is to provide a kind of data reconstruction method of solid state hard disc, passes through sentencing for the retention time to data
It is disconnected, the data for needing to recover are filtered out, data are read out with the address for being written back reading, in the original location, are just preserved
Certain amount of charge, clear operation is not now done to original electric charge, while writes new electric charge, supplement the charge number of leakage,
Can completes the operation of data recovery, while will not take excessive user performance with relatively low performance consumption.
To make the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In accompanying drawing, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belong to the scope of the application protection.
Fig. 1 is refer to, Fig. 1 is a kind of flow chart of the data reconstruction method for solid state hard disc that the embodiment of the present application provides.
The present embodiment provides a kind of data reconstruction method of solid state hard disc, can include：
S101, according to the retention time of data in solid state hard disc, judge whether the data in solid state hard disc are to need to perform
The recovery data of data recovery operation；
This step is intended to, and the data hold time in solid state hard disc judges whether data need to carry out data recovery.
NAND hard disks, due to its storage mechanism, are deposited during data storage and are used for representing data in the grid of data
It the electronics of position, can over time escape, when the electron amount effusion in grid is reduced to certain amount, user can be caused
Read error.Therefore, it is necessary to which the retention time of data storage judges whether to need to carry out recovery behaviour to data by judging
Make.The number that can be used as needs by recording time that all data keep data forward to the time in institute's having time and recover
According to.
It should be noted that the time that data are kept is related to several factors, wherein the PE mainly with physical location (writes
Wipe) number it is relevant.The algorithm typically used in solid state hard disc can ensure each block (module unit) PE number substantially
It is consistent, on this basis, selects the duration ratio of corresponding retention time, implement recovery operation.
Wherein, the retention time of data is started the clock from the write record of data last time, that is to say, that when one
Individual data are merely re-executed after write operation, it is necessary to record the time again.
It should be noted that under different PE, the retention time for keeping data of solid state hard disc also can be different, because
This can typically select preceding 10% to 20% data of retention time sum to be recovered, when avoiding using unified holding
Between standard make comparisons, there is the inaccurate situation of data judging.In addition, generally for different storage granular materials, data are kept
Retention time also have any different, therefore be also required to do not for different granular materials, the time scale of corresponding retention time
Same setting, should specifically select depending on data such as the attribute datas of its granular materials, no longer limit herein.
Certainly, the setting of the proportional numerical value of retention time can ask according to what the environment and needs of concrete application solved
Topic, then select, no longer repeat herein.
S102, recover data if so, then reading, will recover in data write-in solid state hard disc according to the address of reading.
On the basis of step S101, this step is intended to the data for needing to recover performing recovery operation, that is, reads data
Data are write in solid state hard disc according to address is read again.
Wherein, caused by the read error of data is due to the electronics effusion in the grid for store data bit, in general, solution
Certainly method is remapped the data in another position, and needs again to write the erasing of former data before write.Need
Other physical spaces are taken, while increase the pressure of extra data garbage recovery.But for the number in certain time
According to mistake, also there is a number of electronics in the grid of its error in data, is now grid write-in electricity to data storage element
Sub- can recovers original electron amount, can recover data to a certain extent.Original data need not be wiped, can be dropped
Hardware performance needed for low data recovery operation.
To sum up, the embodiment of the present application filters out the data for needing to recover by the retention time of data, reads data grid
The data bit preserved, electronics is filled to former grid according to the information of data bit, that is, number is re-write to the position of grid
According to.Clear operation is not now done to original electric charge, while writes new electric charge, supplements the charge number of leakage, it is possible to relatively low
Performance consumption, complete the operation of data recovery, while excessive user performance will not be taken.
Fig. 2 is refer to, Fig. 2 is a kind of judgement data of the data reconstruction method for solid state hard disc that the embodiment of the present application provides
The flow chart of operation.
With reference to a upper embodiment, the present embodiment be directed to a upper embodiment in how to carry out judge what data manipulation was made
One specific embodiment, other parts are substantially the same with a upper embodiment, and same section refer to an embodiment, herein no longer
Repeat.
The present embodiment can include：
S201, the retention time of all data in solid state hard disc is recorded, and all retention times are performed into sorting operation, obtained
To retention time sequencing table；
This step is intended to, and obtains that the basis for estimation and standard for judging data hold time can be used for.In the present embodiment
In be the retention time and the total time of obtaining that record all data sequencing table.The retention time of all data is recorded, will be all
The retention time of data being ranked up from front to back sequentially in time, it is possible to obtain the sequencing table of data hold time.
The sequential location in the retention time of total data of the retention time of data is may determine that from the sequencing table, so as to judge number
According to whether needing to recover.
S202, judge the retention time of data whether in the preceding preset ratio of retention time sequencing table.
Based on step S201, it is extensive that criterion that this step is intended in previous step judges whether data need to carry out
Multiple operation.Refer to judge in the present embodiment data retention time whether total holding time preceding preset ratio, wherein, in advance
If the setting of ratio should regard specific use environment, data renewal speed and expectation reach which type of data recovering efficiency is done
Selection, is not limited herein.
To sum up, the present embodiment is intended to judge whether data need to carry out data recovery operation according to the retention time of data.
It can effectively judge whether data reach the critical value for needing to recover data by the retention time of record data, can be rational
Arrange the recovery flow of data.
Fig. 3 is refer to, Fig. 3 is a kind of data recovery of the data reconstruction method for solid state hard disc that the embodiment of the present application provides
The flow chart of operation.
With reference to a upper embodiment, the present embodiment is that the data recovery operation that how to carry out being directed in a upper embodiment is made
One specific embodiment, other parts are substantially the same with a upper embodiment, and same section refer to an embodiment, herein no longer
Repeat.
The present embodiment can include：
S301, read and recover data, and judge recover whether to check by ECC；
This step, which is intended to read, recovers data, and judges whether data malfunction.
Wherein, ECC inspections are the Basic examination modes of the error in data in solid state hard disc.In using for solid state hard disc
Cheng Zhong, it will usually there is the read error of some data, can using some checking mechanisms come judge data whether read error, it is right
Follow-up correction process provides criterion.
S302, if so, will then recover in data write-in solid state hard disc according to the address of reading；
On the basis of step S301, this step is intended to the data of no read error carrying out write recovery operation,
Suitable electron amount exactly is poured for data storage data grid, to recover the data of data bit preservation.
S303, if it is not, then selecting error correction algorithm to carry out correction process to recovering data, obtain error correction and recover data；
On the basis of step S301, this step is intended to carry out error-correction operation to the data of read error.Wherein, typically make
Error correction is carried out with Read Retry error correction algorithms, its principle is to go to read again by transducer set voltage after readout error, one
Determine to be that can read correct data in degree.Therefore, error correction algorithm just is used after there is read error, after obtaining error correction
Data.
S304, error correction is recovered into data according in the address write-in solid state hard disc of reading.
On the basis of step S303, the data that this step is intended to recover error correction carry out write operation, that is, to just
Error correction recovers data and carries out recovery operation.
It should be noted that the data of read error, generally also because the electronics effusion for the grid for storing data causes
, solved with technical scheme similar.But be typically read out for the data of read error by error correction algorithm,
The electronics preserved in its data bit, which is still, will not supplement the electronics in grid, make in effusion state, error correction algorithm
Data bit reaches good state data memory.And the technical scheme of the application is directed on the basis of reading, to data grid
The electronics of loss supplemented.
Optionally, it can also include, when the recovery data write the solid state hard disc, open suggestion device.
The embodiment of the present application provides a kind of data reconstruction method of solid state hard disc, passes through sentencing for the retention time to data
It is disconnected, the data for needing to recover are filtered out, data are read out with the address for being written back reading, in the original location, are just preserved
Certain amount of charge, does not now do clear operation to original electric charge, while writes new electric charge, supplements the electric charge of leakage
Number, it is possible to relatively low performance consumption, complete the operation of data recovery, while excessive user performance will not be taken.
A kind of data recovery system of the solid state hard disc provided below the embodiment of the present application is introduced, described below
A kind of data recovery system of solid state hard disc can mutually corresponding ginseng with a kind of above-described data reconstruction method of solid state hard disc
According to.
Fig. 4 is refer to, Fig. 4 is a kind of structural representation of the data recovery system for solid state hard disc that the embodiment of the present application provides
Figure.
The present embodiment can include：
Recover data judge module 100, for the retention time according to data in solid state hard disc, judge in solid state hard disc
Whether data are the recovery data for needing to perform data recovery operation；
Data recovery process module 200, recover data for reading, will recover data write-in solid-state according to the address of reading
In hard disk.
Optionally, recovering data judge module can include：
Data hold time sequencing unit, for recording the retention time of all data in solid state hard disc, and by all guarantors
Time execution sorting operation is held, be maintained time-sequencing table；
Data hold time judging unit, for judge data retention time whether before retention time sequencing table it is pre-
If in ratio.
Optionally, data recovery process module can include：
Digital independent inspection unit, recover data for reading, and judge recover whether to check by ECC；
Data write unit, it will recover in data write-in solid state hard disc for the address according to reading；
Correcting data error unit, for selecting error correction algorithm to carry out correction process to recovering data, obtain error correction and recover data；
Error correction data writing unit, for error correction to be recovered into data according in the address write-in solid state hard disc of reading.
Optionally, data recovery system can also include：
Suggestion device, for being opened when the recovery data write the solid state hard disc.
Each embodiment is described by the way of progressive in specification, and what each embodiment stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think to exceed scope of the present application.
Directly it can be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The data reconstruction method to a kind of solid state hard disc provided herein and data recovery system have been carried out in detail above
It is thin to introduce.Specific case used herein is set forth to the principle and embodiment of the application, and above example is said
It is bright to be only intended to help and understand the present processes and its core concept.It should be pointed out that the ordinary skill for the art
For personnel, on the premise of the application principle is not departed from, some improvement and modification, these improvement can also be carried out to the application
Also fallen into modification in the application scope of the claims.
Claims (8)
- A kind of 1. data reconstruction method of solid state hard disc, it is characterised in that including：According to the retention time of data in solid state hard disc, judge whether the data in the solid state hard disc are to need to perform number According to the recovery data of recovery operation；If so, then reading the recovery data, the recovery data are write in the solid state hard disc according to the address of reading.
- 2. data reconstruction method according to claim 1, it is characterised in that the holding according to data in solid state hard disc Time, judge whether the data in the solid state hard disc are the recovery data for needing to perform data recovery operation, including：The retention time of all data in the solid state hard disc is recorded, and all retention times are performed into sequence Operation, be maintained time-sequencing table；Judge the retention time of the data whether in the preceding preset ratio of retention time sequencing table.
- 3. data reconstruction method according to claim 2, it is characterised in that it is described to read the recovery data, according to reading The address taken writes the recovery data in the solid state hard disc, including：The recovery data are read, and judge whether the recovery is checked by ECC；If so, then the recovery data are write in the solid state hard disc according to the address of reading；If it is not, then selecting error correction algorithm to carry out correction process to the recovery data, obtain error correction and recover data；The error correction is recovered into data to write in the solid state hard disc according to the address of reading.
- 4. data reconstruction method according to claim 3, it is characterised in that also include：When the recovery data write the solid state hard disc, suggestion device is opened.
- A kind of 5. data recovery system of solid state hard disc, it is characterised in that including：Recover data judge module, for the retention time according to data in solid state hard disc, judge the institute in the solid state hard disc State whether data are the recovery data for needing to perform data recovery operation；Data recovery process module, for reading the recovery data, the recovery data are write into institute according to the address of reading State in solid state hard disc.
- 6. data recovery system according to claim 5, it is characterised in that the recovery data judge module includes：Data hold time sequencing unit, for recording the retention time of all data in the solid state hard disc, and All retention times are performed into sorting operation, be maintained time-sequencing table；Data hold time judging unit, for judging the retention time of the data whether in retention time sequencing table In preceding preset ratio.
- 7. data recovery system according to claim 6, it is characterised in that the data recovery process module includes：Digital independent inspection unit, for reading the recovery data, and judge whether the recovery is checked by ECC；Data write unit, the recovery data are write in the solid state hard disc for the address according to reading；Correcting data error unit, for selecting error correction algorithm to carry out correction process to the recovery data, obtain error correction and recover data；Error correction data writing unit, the solid state hard disc is write according to the address of reading for the error correction to be recovered into data In.
- 8. data recovery system according to claim 7, it is characterised in that also include：Suggestion device, for being opened when the recovery data write the solid state hard disc.
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| CN110083478A (en) * | 2018-01-25 | 2019-08-02 | 力瑞信（深圳）科技有限公司 | A kind of data reconstruction method, data recovery system and solid state hard disk |
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