CN106155596A - Method for writing data and device - Google Patents
Method for writing data and device Download PDFInfo
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- CN106155596A CN106155596A CN201610626559.4A CN201610626559A CN106155596A CN 106155596 A CN106155596 A CN 106155596A CN 201610626559 A CN201610626559 A CN 201610626559A CN 106155596 A CN106155596 A CN 106155596A
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- Prior art keywords
- data
- storage device
- described storage
- backup
- write
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0614—Improving the reliability of storage systems
- G06F3/0619—Improving the reliability of storage systems in relation to data integrity, e.g. data losses, bit errors
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
Abstract
The present invention is applicable to the communications field, it is provided that a kind of method for writing data and device.Described method includes: on a storage device during electricity, it is judged that backed up and marked whether set；When backup completes labelling set, the data of the backup area of described storage device are write the target area of described storage device；When backup completes the non-set of labelling and receives data write request, read the data of the target area of described storage device, and the data of the target area of the described storage device read are compared with data to be written；Choose whether that being written into data writes described storage device according to comparative result.The integrity of the data of write target area can be improved by said method.
Description
Technical field
The embodiment of the present invention belongs to the communications field, particularly relates to a kind of method for writing data and device.
Background technology
In the daily life of user, it may be necessary to the various storage devices extra data of storage, such as, by smart card or
USBKey stores data.But smart card on the market or USBKey are when being stored in data, are directly data to be stored in smart card
Or the target area of the memory element of USBKey.And if data being stored in the target of the memory element of smart card or USBKey
Power-off occurring during region, then the target area of memory element may be caused to produce abnormal result, such as data are muddled things up,
Even smart card or USBKey can be caused to scrap because of the entanglement of internal data structure.
Summary of the invention
Embodiments provide a kind of method for writing data and device, it is intended to solve existing method for writing data and exist
Occur during power-off, to cause target area to produce abnormal result, even can cause intelligence because of the entanglement of internal data structure
The problem that energy card or USBKey scrap.
The embodiment of the present invention is achieved in that a kind of method for writing data, and described method includes:
On a storage device during electricity, it is judged that backed up and marked whether set；
When backup completes labelling set, the data of the backup area of described storage device are write described storage device
Target area；
When backup completes the non-set of labelling and receives data write request, read the target area of described storage device
Data, and the data of the target area of the described storage device read are compared with data to be written；
Choose whether that being written into data writes described storage device according to comparative result.
The another object of the embodiment of the present invention is to provide a kind of data transfer apparatus, and described device includes:
Back up flag state judging unit, when electricity on a storage device, it is judged that backed up and marked whether
Set；
Target region data writing unit, for when backup completes labelling set, by the backup area of described storage device
Data write described storage device target area；
Data comparing unit to be written, for when backup completes the non-set of labelling and receives data write request, reads
Take the data of the target area of described storage device, and by the data of the target area of described storage device read and data to be written
Relatively；
Data write selects unit, for choosing whether that being written into the data described storage of write sets according to comparative result
Standby.
In embodiments of the present invention, due to after electricity on a storage device, according to the number having backed up labelling and target area
Choose whether to be written into data write storage device according to the comparative result with data to be written, therefore, it is to avoid at target area weight
Make carbon copies into data to be written, thus ensure integrity and the accuracy of the data of target area.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of method for writing data that first embodiment of the invention provides；
Fig. 2 is the target area communication schematic diagram with backup area of first embodiment of the invention offer；
Fig. 3 is the PC terminal communication schematic diagram with smart card of first embodiment of the invention offer；
Fig. 4 is mobile terminal and bluetooth shield or the communication schematic diagram of card shield of first embodiment of the invention offer；
Fig. 5 is the PC terminal communication schematic diagram with USBKey of first embodiment of the invention offer；
Fig. 6 is the structure chart of a kind of data transfer apparatus that second embodiment of the invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
In the embodiment of the present invention, on a storage device during electricity, it is judged that backed up and marked whether set, completed in backup
During labelling set, the data of the backup area of described storage device are write the target area of described storage device, completes in backup
The non-set of labelling and when receiving data write request, reads the data of the target area of described storage device, and the institute that will read
The data of the target area stating storage device compare with data to be written, choose whether to be written into data write according to comparative result
Described storage device.
In order to technical solutions according to the invention are described, illustrate below by specific embodiment.
Embodiment one:
Fig. 1 shows the flow chart of a kind of method for writing data that first embodiment of the invention provides, and details are as follows:
Step S11, on a storage device during electricity, it is judged that backed up and marked whether set.
Can be stored in the backup information log of backup area as in figure 2 it is shown, backed up labelling.This backup information is remembered
The content of record table is except including that backup completes labelling, it is also possible to include data block address and size of data, the verification of target area
Positions etc., wherein check bit is for verifying the integrity having backed up labelling, data block address and size of data.
Storage device includes: contact or contact type intelligent card, Bluetooth intelligent card or bluetooth shield, USBKey etc..At this
In inventive embodiments, storage device includes backup area and target area.
On a storage device during electricity (such as storage device and mobile terminal or PC terminal called), when data need from mobile whole
When end or PC terminal transmission are to storage device, in order to ensure to write the integrity of the data of target area, storage device needs to judge
(wherein, the abnormal write including that power-off causes of write is abnormal, and system is collapsed suddenly and caused extremely whether data write before powering on
Write abnormal etc.) judge, specifically, it is judged that backed up and marked whether set, such as, when backup completes to be designated
When 1, represent that backup completes labelling set, when backup completes to be designated 0, represent that backup completes the non-set of labelling.Such as Fig. 3 institute
Show, it is provided that PC terminal and the communication schematic diagram of smart card, assist with 7816 smart cards between card reader and card (i.e. smart card)
View carries out communication.Fig. 4 provides mobile terminal and bluetooth shield or the communication schematic diagram of card shield.Fig. 5 provide PC terminal with
The communication schematic diagram of USBKey.
Step S12, when backup completes labelling set, deposits described in the data write of the backup area of described storage device
The target area of storage equipment.
When backup completes labelling set, show that data have been completely written to the backup area of storage device, now, even if
When the data of backup area are write target area, there is the Deviant Behavioies such as power-off, also again can read from backup area after again powering on
Fetch data write target area, thus ensures the integrity of the data of target area.
Wherein, described step S12 includes:
A1, when backup completes labelling set, it is judged that whether the target area of described storage device exists and described storage
The data that the data of the backup area of equipment are identical.
A2, the number not identical with the data of the backup area of described storage device in the target area of described storage device
According to time, the data of the backup area of described storage device are write the target area of described storage device.
In above-mentioned A1～A2, when the data that target area is not identical with backup area, show that target area is not the most deposited
The data of backup area now, then are write target area by the data of storage backup area storage, it is ensured that the data of target area complete
Property.Certainly, when there are the data identical with backup area in target area, no longer the data of backup area are write target area, owing to subtracting
Lack the write-once operation of storage device, be thus advantageous to improve the service life of storage device.
It is pointed out that in the target area that the data of the backup area of described storage device are write described storage device
Time, can be directly by the target area of the data write storage device of the backup area of storage device, it is also possible in above-mentioned A1 and A2,
First judge whether the target area of described storage device exists the data identical with the data of the backup area of described storage device, then root
It is judged that result chooses whether that the data of the backup area by described storage device write the target area of described storage device.
Alternatively, described A2 or directly by the target area of the data write storage device of the backup area of storage device it
After include:
Backup is completed labelling and is updated to non-SM set mode from SM set mode.Further, described, backup is completed
Labelling after SM set mode is updated to non-SM set mode, including:
Delete the data of the backup area of described storage device.After the data of backup area being write target area, in order to
Save the memory space of backup area, it is simple to data update and backup next time, need to delete the backup area written into storage device
Data.
In above-mentioned steps, it is updated to non-SM set mode owing to first backup to be completed labelling from SM set mode, then deletes standby
The data in part district rather than first delete the data of backup area and backup is completed labelling be again updated to non-set shape from SM set mode
State, therefore, it is possible to avoid the occurrence of delete backup area data after but backup is not completed labelling and is updated to from SM set mode
Power-off occurs during non-SM set mode, the data of backup area can not be write when next time powers on the situation of target area, thus enter one
Step ensures the integrity of the data of target area.
Step S13, when backup completes the non-set of labelling and receives data write request, reads described storage device
The data of target area, and the data of the target area of the described storage device read are compared with data to be written.
Here data to be written refer to will the data of write storage device, when storage device receives data write please
When asking, data to be written can be obtained from data write request.
Specifically, one by one the data of the target area of the storage device of reading are compared with data to be written, certainly, in order to carry
High data compare speed, after comparing a character, then can extract the character of same intervals in target area and data to be written
Compare.
According to comparative result, step S14, chooses whether that being written into data writes described storage device.
Alternatively, described step S14 specifically includes:
B1, when the data of target area of the described storage device read are identical with data to be written, refuse described data
Write request.Specifically, when refusing data write request, refusal is written into the target area of data write storage device.
B2, when the data of target area of the described storage device read are different from data to be written, by described to be written
Data write the backup area of described storage device, and backup complete flag update after the end of the write for SM set mode.
B3, the data of the backup area of described storage device are write the target area of described storage device.
B4, write described storage device target area after, backup is completed labelling and is updated to not from SM set mode
SM set mode, then delete the data of the backup area of described storage device.
In above-mentioned B1～B4, when the data of target area are identical with data to be written, show that target area is to be written written into this
Enter data, in order to avoid repeatedly writing, improve the life-span of storage device, data write request will be refused.Data when target area
Time different from data to be written, show that target area does not writes this data to be written, then in order to ensure the complete of the data of target area
Property, need the data of backup area are write target area.
Alternatively, after described step S14, including:
C1, reception data write request.Wherein, this data write request carries data to be written.
C2, described data to be written are write the backup area of described storage device, and after the end of the write backup is completed
Flag update is SM set mode.
C3, the data of the backup area of described storage device are write the target area of described storage device.
C4, write described storage device target area after, backup is completed labelling and is updated to not from SM set mode
SM set mode, then delete the data of the backup area of described storage device.
When after powering on not being write data first, when writing data into storage device, first can write storage device
Backup region, will update the backup mark of backup information log, finally after the backup region being completely written to storage device
Again by the target area of the data write storage device in the backup region of write storage device.If needing update all target area
The data in territory, then need not read the data of original target area, directly needing the data updated to be written to storage device
Backup region in.
In first embodiment of the invention, on a storage device during electricity, it is judged that backed up and marked whether set, in backup
When completing labelling set, the data of the backup area of described storage device are write the target area of described storage device, in backup
When completing the non-set of labelling and receive data write request, read the data of the target area of described storage device, and will read
The data of target area of described storage device compare with data to be written, choose whether to be written into data according to comparative result
Write described storage device.Due to after electricity on a storage device, according to having backed up the data of labelling and target area with to be written
The comparative result entering data chooses whether to be written into data write storage device, therefore, it is to avoid be repeatedly written in target area and treat
Write data, thus ensure integrity and the accuracy of the data of target area.
Should be understood that in embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the elder generation of execution sequence
After, the execution sequence of each process should determine with its function and internal logic, and should be to the implementation process structure of the embodiment of the present invention
Become any restriction.
Embodiment two:
Fig. 5 shows the structure chart of a kind of data transfer apparatus that second embodiment of the invention provides, these data write dress
Put and can be applicable in various storage device, such as, be applied to contact or contact type intelligent card, Bluetooth intelligent card or bluetooth
Shield, USBKey.For convenience of description, illustrate only the part relevant to the embodiment of the present invention.
This data transfer apparatus includes: backed up flag state judging unit 61, target region data writing unit 62, treated
Write data comparing unit 63, data write select unit 64.Wherein:
Back up flag state judging unit 61, when electricity on a storage device, it is judged that backed up and marked whether
Set.
On a storage device during electricity (such as storage device and mobile terminal or PC terminal called), when data need from mobile whole
When end or PC terminal transmission are to storage device, in order to ensure to write the integrity of the data of target area, storage device needs to judge
(wherein, the abnormal write including that power-off causes of write is abnormal, and system is collapsed suddenly and caused extremely whether data write before powering on
Write abnormal etc.) judge.
Target region data writing unit 62, for when backup completes labelling set, by the backup of described storage device
The data in district write the target area of described storage device.
When backup completes labelling set, show that data have been completely written to the backup area of storage device, now, even if
When the data of backup area are write target area, there is the Deviant Behavioies such as power-off, also again can read from backup area after again powering on
Fetch data write target area, thus ensures the integrity of the data of target area.
Data comparing unit 63 to be written, is used for when backup completes the non-set of labelling and receives data write request,
Read the data of the target area of described storage device, and by the data of the target area of described storage device read and number to be written
According to comparing.
Here data to be written refer to will the data of write storage device, when storage device receives data write please
When asking, data to be written can be obtained from data write request.
Specifically, one by one the data of the target area of the storage device of reading are compared with data to be written, certainly, in order to carry
High data compare speed, after comparing a character, then can extract the character of same intervals in target area and data to be written
Compare.
Data write selects unit 64, for choosing whether that being written into the data described storage of write sets according to comparative result
Standby.
Alternatively, the write of described data selects unit 64 to include:
Data write request refusal module, the data for the target area in the described storage device read and number to be written
According to time identical, refuse described data write request.
Backup area Data write. module, the data for the target area in the described storage device read and data to be written
Time different, described data to be written write the backup area of described storage device, and after the end of the write backup is completed labelling
It is updated to SM set mode.
First object district Data write. module, sets for the data of the backup area of described storage device are write described storage
Standby target area.
Back up flag update module, for after writing the target area of described storage device, backup has been completed mark
Note is updated to non-SM set mode from SM set mode, then deletes the data of the backup area of described storage device.
Above-mentioned data write request refusal module, backup area Data write. module, first object district Data write. module, standby
Part completes in flag update module, when the data of target area are identical with data to be written, shows that target area is to be written written into this
Enter data, in order to avoid repeatedly writing, improve the life-span of storage device, data write request will be refused.Data when target area
Time different from data to be written, show that target area does not writes this data to be written, then in order to ensure the complete of the data of target area
Property, need the data of backup area are write target area.
Alternatively, above-mentioned target region data writing unit 62 includes:
Data Comparison module, for when backup completes labelling set, it is judged that the target area of described storage device
Whether there are the data identical with the data of the backup area of described storage device.
Second target region data writing module, for not setting with described storage in the target area of described storage device
During the identical data of the data of standby backup area, the data of the backup area of described storage device are write the mesh of described storage device
Mark district.
In above-mentioned data Comparison module and the second target region data writing module, when target area not and backs up
During the identical data in district, show that target area does not the most store the data of backup area storage, now, then the data of backup area are write
Target area, it is ensured that the integrity of the data of target area.Certainly, when there are the data identical with backup area in target area, no longer
The data of backup area are write target area, operates owing to decreasing the write-once of storage device, be thus advantageous to improve storage
The service life of equipment.
It is pointed out that in the target area that the data of the backup area of described storage device are write described storage device
Time, can be directly by the target area of the data write storage device of the backup area of storage device, it is also possible to first judge described storage
Whether the target area of equipment exists the data identical with the data of the backup area of described storage device, selects further according to judged result
Whether by the target area of the data described storage device of write of the backup area of described storage device.
Alternatively, described data transfer apparatus includes:
First to have backed up flag update be non-set unit, is updated to from SM set mode for backup is completed labelling
Non-SM set mode.
Alternatively, described data transfer apparatus includes:
Backup area data deletion unit, for deleting the data of the backup area of described storage device.When by backup area
After data write target area, in order to save the memory space of backup area, it is simple to data update and backup next time, need to delete
Data written into the backup area of storage device.
First has backed up flag update in non-set unit and backup area data deletion unit, owing to first will back up
Become labelling to be updated to non-SM set mode from SM set mode, then delete the data of backup area rather than first delete the number of backup area
Being updated to non-SM set mode according to again backup being completed labelling from SM set mode, deleting backup area therefore, it is possible to avoid the occurrence of
After data but backup is not completed labelling and when SM set mode is updated to non-SM set mode, power-off occurs, when powering on next time
The data of backup area can not be write the situation of target area, thus be further ensured that the integrity of the data of target area.
Alternatively, described data transfer apparatus includes:
Data write request receives unit, is used for receiving data write request.Wherein, this data write request carries to be written
Enter data.
Back up flag update for set unit, for described data to be written are write the standby of described storage device
Part district, and after the end of the write backup is completed flag update for SM set mode.
The data transfer unit of backup area, for writing described storage device by the data of the backup area of described storage device
Target area.
Second to have backed up flag update be non-set unit, for after writing the target area of described storage device,
Backup is completed labelling and is updated to non-SM set mode from SM set mode, then delete the data of the backup area of described storage device.
When after powering on not being write data first, when writing data into storage device, first can write storage device
Backup region, will update the backup mark of backup information log, finally after the backup region being completely written to storage device
Again by the target area of the data write storage device in the backup region of write storage device.If needing update all target area
The data in territory, then need not read the data of original target area, directly needing the data updated to be written to storage device
Backup region in.
In second embodiment of the invention, due to after electricity on a storage device, according to having backed up labelling and target area
Data choose whether to be written into data write storage device, therefore, it is to avoid in target area with the comparative result of data to be written
It is repeatedly written data to be written, thus ensures integrity and the accuracy of the data of target area.
Those of ordinary skill in the art are it is to be appreciated that combine the list of each example that the embodiments described herein describes
Unit and algorithm steps, it is possible to being implemented in combination in of electronic hardware or computer software and electronic hardware.These functions are actually
Perform with hardware or software mode, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel
Each specifically should being used for can be used different methods to realize described function, but this realization is it is not considered that exceed
The scope of the present invention.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the system of foregoing description,
The specific works process of device and unit, is referred to the corresponding process in preceding method embodiment, does not repeats them here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method, permissible
Realize by another way.Such as, device embodiment described above is only schematically, such as, and described unit
Dividing, be only a kind of logic function and divide, actual can have other dividing mode, the most multiple unit or assembly when realizing
Can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or
The coupling each other discussed or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communication connection, can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme
's.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.
If described function is using the form realization of SFU software functional unit and as independent production marketing or use, permissible
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is the most in other words
The part contributing prior art or the part of this technical scheme can embody with the form of software product, this meter
Calculation machine software product is stored in a storage medium, including some instructions with so that a computer equipment (can be individual
People's computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.
And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-Only Memory), random access memory are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic disc or CD.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.
Claims (12)
1. a method for writing data, it is characterised in that described method includes:
On a storage device during electricity, it is judged that backed up and marked whether set；
When backup completes labelling set, the data of the backup area of described storage device are write the target of described storage device
District；
When backup completes the non-set of labelling and receives data write request, read the number of the target area of described storage device
According to, and the data of the target area of the described storage device read are compared with data to be written；
Choose whether that being written into data writes described storage device according to comparative result.
Method the most according to claim 1, it is characterised in that described choose whether to be written into data according to comparative result
Write described storage device, specifically include:
When the data of the target area of the described storage device read are identical with data to be written, refusing the write of described data please
Ask；
When the data of the target area of the described storage device read are different from data to be written, described data to be written are write
The backup area of described storage device, and after the end of the write backup is completed flag update for SM set mode；
The data of the backup area of described storage device are write the target area of described storage device；
After writing the target area of described storage device, backup is completed labelling and is updated to non-set shape from SM set mode
State, then delete the data of the backup area of described storage device.
Method the most according to claim 1 and 2, it is characterised in that described when backup completes labelling set, by described
The data of the backup area of storage device write the target area of described storage device, specifically include:
When backup completes labelling set, it is judged that it is standby whether the target area of described storage device exists with described storage device
The data that the data in part district are identical；
During not identical with the data of the backup area of described storage device in the target area of described storage device data, will
The data of the backup area of described storage device write the target area of described storage device.
Method the most according to claim 3, it is characterised in that write in the described data by the backup area of described storage device
After entering the target area of described storage device, including:
Backup is completed labelling and is updated to non-SM set mode from SM set mode.
Method the most according to claim 4, it is characterised in that backup is completed labelling from the renewal of SM set mode described
After non-SM set mode, including:
Delete the data of the backup area of described storage device.
Method the most according to claim 1, it is characterised in that choose whether to be written into number according to comparative result described
After writing described storage device, including:
Receive data write request；
Described data to be written are write the backup area of described storage device, and after the end of the write backup is completed flag update
For SM set mode；
The data of the backup area of described storage device are write the target area of described storage device；
After writing the target area of described storage device, backup is completed labelling and is updated to non-set shape from SM set mode
State, then delete the data of the backup area of described storage device.
7. a data transfer apparatus, it is characterised in that described device includes:
Back up flag state judging unit, when electricity on a storage device, it is judged that backed up and marked whether set；
Target region data writing unit, for when backup completes labelling set, by the number of the backup area of described storage device
According to the target area writing described storage device；
Data comparing unit to be written, for when backup completes the non-set of labelling and receives data write request, reads institute
State the data of the target area of storage device, and by the data of the target area of described storage device read and data ratio to be written
Relatively；
Data write selects unit, for choosing whether that being written into data writes described storage device according to comparative result.
Device the most according to claim 7, it is characterised in that the write of described data selects unit to include:
Data write request refusal module, for data and the data phase to be written of the target area in the described storage device read
Meanwhile, described data write request is refused；
Backup area Data write. module, the data for the target area in the described storage device read are different from data to be written
Time, described data to be written are write the backup area of described storage device, and after the end of the write backup is completed flag update
For SM set mode；
First object district Data write. module, for writing described storage device by the data of the backup area of described storage device
Target area；
Backed up flag update module, for write described storage device target area after, backup is completed labelling from
SM set mode is updated to non-SM set mode, then deletes the data of the backup area of described storage device.
9. according to the device described in claim 7 or 8, it is characterised in that described target region data writing unit includes:
Data Comparison module, for when backup completes labelling set, it is judged that whether the target area of described storage device
There are the data identical with the data of the backup area of described storage device；
Second target region data writing module, in the target area of described storage device not with described storage device
During the identical data of the data of backup area, the data of the backup area of described storage device are write the target of described storage device
District.
Device the most according to claim 9, it is characterised in that described device includes:
First to have backed up flag update be non-set unit, is updated to not put from SM set mode for backup is completed labelling
Position state.
11. devices according to claim 10, it is characterised in that described device includes:
Backup area data deletion unit, for deleting the data of the backup area of described storage device.
12. devices according to claim 7, it is characterised in that described device includes:
Data write request receives unit, is used for receiving data write request；
Back up flag update for set unit, for described data to be written being write the backup of described storage device
District, and after the end of the write backup is completed flag update for SM set mode；
The data transfer unit of backup area, for writing the mesh of described storage device by the data of the backup area of described storage device
Mark district；
Second to have backed up flag update be non-set unit, for after writing the target area of described storage device, by standby
Part completes labelling and is updated to non-SM set mode from SM set mode, then deletes the data of the backup area of described storage device.
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| CN201610626559.4A CN106155596B (en) | 2016-08-03 | 2016-08-03 | Data writing method and device |
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