CN104281505A - Data backup method and device and electronic device - Google Patents
Data backup method and device and electronic device Download PDFInfo
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- CN104281505A CN104281505A CN201310276421.2A CN201310276421A CN104281505A CN 104281505 A CN104281505 A CN 104281505A CN 201310276421 A CN201310276421 A CN 201310276421A CN 104281505 A CN104281505 A CN 104281505A
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Abstract
The invention discloses a data backup method and device and an electronic device, and belongs to the technical field of computers. The data backup method comprises the steps that data backup signals are received; data located in a preset logic address section are subjected to backup according to the data backup signals; a mapping table corresponding to the backup data is subjected to backup, the mapping table comprises the corresponding relation between a logic block address corresponding to the data after backup and a preset physical address, and the preset physical address comprises a physical block address and/or the combination of the physical block address and preset offset. The effects that after the electronic device receives the data backup signals, the data in the preset logic address section can be directly subjected to backup, the mapping table corresponding to the data after backup can be correspondingly subjected to backup without any auxiliary equipment, and the data backup method and device and the electronic device are suitable for all usage scenarios are achieved.
Description
Technical field
The present invention relates to field of computer technology, particularly a kind of data back up method, device and electronic equipment.
Background technology
Data storage is the most conventional in the electronic equipment of such as mobile phone, panel computer or electronic reader and so on and one of of paramount importance function.But, use in the process of electronic equipment user, may because the reason such as the maloperation of user or electronic equipment infection virus makes the loss of data in electronic equipment, so now electronic equipment recovers the data of having lost with regard to needing.
In order to can recover the data of losing in electronic equipment, data can first back up by electronic equipment.Existing a kind of data back up method can comprise: electronic equipment is connected with computer by user's usage data line; Then by the Backup and Restore software in computer the data in electronic equipment are transferred in computer and back up; Such as, after electronic equipment is connected with computer by user's usage data line, by softwares such as such as ' the X beanpods ' installed in computer the data in electronic equipment is transferred in computer and backs up.
Realizing in process of the present invention, inventor finds prior art, and at least there are the following problems:
When carrying out data backup, electronic equipment needs by other utility appliance such as computer and data line; So this just causes the data backup operation when user does not have computer or data line not realize, existing scheme is not suitable for all application scenarioss.
Summary of the invention
Electronic equipment can be caused when carrying out data backup in order to solve the data back up method needing prior art to provide, need by other utility appliance such as computer and data line, the problem not being suitable for all application scenarioss, embodiments provide a kind of data back up method, device and electronic equipment.Described technical scheme is as follows:
First aspect, provides a kind of data back up method, and for including in the electronic equipment of the storage card adopting block to map, described data back up method comprises:
Backup reception data signal;
According to described data backup signal, the data being arranged in predetermined logical address section are backed up;
Mapping table corresponding to data after backup is backed up, described mapping table comprises the corresponding relation between LBA (Logical Block Addressing) corresponding to the data after described backup and preset physical address, and described preset physical address comprises the combination of physical block address and/or physical block address and predetermined offset.
Second aspect, provides a kind of data backup device, and for including in the electronic equipment of the storage card adopting block to map, described data backup device, comprising:
First receiver module, for backup reception data signal;
The data being arranged in predetermined logical address section are backed up for the described data backup signal received according to described first receiver module by the first backup module;
Second backup module, for the mapping table corresponding to the data after backup is backed up, described mapping table comprises the corresponding relation between LBA (Logical Block Addressing) corresponding to the data after described backup and preset physical address, and described preset physical address comprises the combination of physical block address and/or physical block address and predetermined offset.
The third aspect, provides a kind of electronic equipment, and described electronic equipment comprises the data backup device described in second aspect.
The beneficial effect of the technical scheme that the embodiment of the present invention provides is:
By backup reception data signal, thus according to data backup signal, the data being arranged in predetermined logical address section are backed up, and the mapping table corresponding to the data after backup is backed up; The data back up method that solving prior art provides can cause electronic equipment when carrying out data backup, needs by other utility appliance such as computer and data line, the problem not being suitable for all application scenarioss; Reach electronic equipment after receiving data backup signal, directly the data in predetermined logical address section can be backed up, and accordingly the mapping table corresponding to the data after backup is backed up, and do not need by any utility appliance, the effect going for all use scenes.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the method flow diagram of the data back up method that the embodiment of the present invention one provides;
Fig. 2 is the method flow diagram of the data back up method that the embodiment of the present invention two provides;
Fig. 3 is the schematic diagram of a kind of data merging method that the embodiment of the present invention two provides;
Fig. 4 is the schematic diagram of the another kind of data merging method that the embodiment of the present invention two provides;
Fig. 5 is the method flow diagram of the data back up method that the embodiment of the present invention three provides;
Fig. 6 is the schematic diagram of data back up method when carrying out date restoring that the embodiment of the present invention three provides;
Fig. 7 is the block diagram of the data backup device that the embodiment of the present invention four provides;
Fig. 8 is the block diagram of the data backup device that the embodiment of the present invention five provides;
Fig. 9 is the block diagram of the first backup module that the embodiment of the present invention five provides;
Figure 10 is another block diagram of the first backup module that the embodiment of the present invention five provides;
Figure 11 is another block diagram that the embodiment of the present invention five provides data backup device.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
For convenience of description, first the relevant knowledge involved by the embodiment of the present invention is described in detail.
Existing storage card is mainly divided into NAND and XOR two type, and wherein, NAND aims at data design Storage.The storage area of a NAND storage card can comprise at least one block, and each piece comprises at least one page, and block is the minimum unit of erasable operation, and page is the minimum unit of read-write operation.In the electronic equipment of storage card including NAND type, when electronic equipment need to read and write the data in storage card or renewal rewards theory time, electronic equipment needs to carry out the address maps between logic magnetic disc address and physical disk address.And according to the difference of address mapping granule, address maps can be divided into page mapping, block mapping and mixed-use developments.Wherein:
Page mapping is the address maps in units of page, each logical page (LPAGE) corresponds to a Physical Page, and the mapping table preserved in internal memory based on page, thus when electronic equipment needs to read the data stored in storage card, electronic equipment directly can read according to the mapping relations between logical page (LPAGE) with Physical Page the data stored in corresponding Physical Page; When actual realization, the storage card mapped based on page mainly contains the memory devices such as solid state hard disc;
Block mapping is the address maps in units of block, and the address offset in logical block is identical with the address offset in physical block, and each logical block corresponds to a physical block, preserves block-based mapping table in internal memory.Concrete, when electronic equipment reads the data stored in the storage card adopting block to map, need first logical address to be converted to LBA (Logical Block Addressing), and calculate the address offset of this logical address in logical block; Such as, electronic equipment needs the logical address read to be 261, and size corresponding to each logical address is 512B, and comprise 64 pages in each logical block, the size of each page is 2KB; Then logical address first can be converted to logical page address LPN=261/4=65 by electronic equipment, then logical page address is converted to LBA (Logical Block Addressing) LBN=65/64=1, and the address offset offset=65%64=1 in computational logic block, after above-mentioned conversion, electronic equipment can be known to be needed to read data in first page of the physical block corresponding with logical block 1.When actual realization, the storage card of block mapping table is adopted to have the memory devices such as SD card, mmc card and eMMC card
Mixed-use developments refers in storage card that there is page maps and block maps simultaneously, is also that mapping table comprises mapping table based on page and block-based mapping table simultaneously, specifically please refer to above-mentioned two situations, do not repeat them here.
Embodiment one
Please refer to Fig. 1, it illustrates the method flow diagram of the data back up method that the embodiment of the present invention one provides, this data back up method may be used for including in the electronic equipment of the storage card adopting block to map, and this data back up method can comprise:
Step 101, backup reception data signal;
The data being arranged in predetermined logical address section are backed up according to data backup signal by step 102;
Step 103, backs up the mapping table corresponding to the data after backup.
Wherein, mapping table comprises the corresponding relation between LBA (Logical Block Addressing) corresponding to the data after backup and preset physical address, and preset physical address comprises the combination of physical block address and/or physical block address and predetermined offset.
In sum, the data being arranged in predetermined logical address section by backup reception data signal, thus are backed up according to data backup signal by the data back up method that the present embodiment provides, and are backed up by the mapping table corresponding to the data after backup; The data back up method that solving prior art provides can cause electronic equipment when carrying out data backup, needs by other utility appliance such as computer and data line, the problem not being suitable for all application scenarioss; Reach electronic equipment after receiving data backup signal, directly the data in predetermined logical address section can be backed up, and accordingly the mapping table corresponding to the data after backup is backed up, and do not need by any utility appliance, the effect going for all use scenes.
Embodiment two
Please refer to Fig. 2, it illustrates the method flow diagram of the data back up method that the embodiment of the present invention two provides, this data back up method may be used for including in the electronic equipment of the storage card adopting block to map, and this data back up method can comprise:
Step 201, backup reception data signal;
Use in the process of electronic equipment user, in order to can loss of data in the electronic device time, recover the data of having lost, user can ask some data in electronic equipment to back up, accordingly, electronic equipment can receive data backup signal.
The data being arranged in predetermined logical address section under the current backup moment are merged by step 202 in units of block, make the storage area occupied by data after merging be less than the storage area initially occupied;
Because electronic equipment is when performing data deletion action or Data Update operation, the data stored in the page in the storage area of storage card can be made to become invalid data, so the storage space in order to discharge the page storing invalid data, after electronic equipment receives the data backup signal of user's input, the data being arranged in predetermined logical address section can merge by electronic equipment; But, in the storage card mapped owing to adopting block, electronic equipment can only manage block, the concrete page that can not manage, so when electronic equipment carries out Data Data merging, the data being arranged in predetermined logical address section under the current backup moment can merge by electronic equipment in units of block, make the storage area occupied by data after merging be less than the storage area initially occupied.Concrete, the step that electronic equipment carries out data merging can comprise the following two kinds implementation.
In the implementation that the first is possible, the data being arranged in predetermined logical address section under the current backup moment merge by electronic equipment in units of block, and the step making the storage area occupied by data after merging be less than the storage area initially occupied can comprise:
First, detect in the storage area occupied by data in predetermined logical address section and whether there are at least two blocks meeting the first predetermined condition, the first predetermined condition comprises in the page being in same position at least two blocks has at most the data stored in a page to be valid data;
In the storage card mapped owing to adopting block, the storage size of storage card is all more limited, so when electronic equipment merges the data data of carrying out in units of block, electronic equipment selects at least two blocks meeting the first predetermined condition to merge as much as possible, thus reduces the storage space of the additional information brought when data merge.Wherein, the first predetermined condition comprises in the page being in same position at least two blocks has at most the data stored in a page to be valid data.
Concrete, because the storage card in electronic equipment is that the mode adopting block to map carries out address maps, electronic equipment cannot manage concrete page, so when carrying out data and merging, normally the valid data stored in the whole pages in the block of at least two in storage card are merged in same piece and store, so before carrying out data merging, electronic equipment first can detect at least two blocks whether existing in the storage area occupied by data in predetermined logical address section and meet the first predetermined condition.
The second, if testing result is there are at least two blocks meeting the first predetermined condition, then the valid data stored at least two blocks is incorporated into other block and stores, make all valid data including at least two blocks in other block.
If testing result is there are at least two blocks meeting the first predetermined condition, then the valid data stored at least two blocks can be incorporated in other block and store by electronic equipment, thus make all valid data including at least two blocks in other block.
Such as, electronic equipment detects in the storage area occupied by the data in predetermined logical address section to there is the data block that two are respectively BLOCK A and BLOCK B, being in the page of same position of these two data blocks only has the data stored in a page to be valid data, so now, the data mobile stored in the page of valid data in BLOCK A and BLOCK B can directly store by electronic equipment in the free block BLOCK C of in storage area, please refer to Fig. 3.
It should be noted that, the data block of more than three or three can be there is when actual realization, be in these data blocks in the page of same position and only have the data stored in a page to be valid data, so now, the data stored in these data blocks in the page of valid data can move in the corresponding page of other free block and store by electronic equipment respectively respectively, and the present embodiment does not repeat them here.
In the implementation that the second is possible, the data being arranged in predetermined logical address section under the current backup moment merge by electronic equipment in units of block, and the step making the storage area occupied by data after merging be less than the storage area initially occupied can comprise:
The first, detect in the storage area occupied by data in predetermined logical address section whether there are at least two blocks meeting the second predetermined condition; At least two blocks comprise at least one first kind block and at least one Second Type block, and the second predetermined condition is in the page of same position after comprising each piece of predetermined offset that skew is identical or different separately in first kind block compared with each piece in Second Type block has at most the data stored in a page to be valid data;
In the implementation that the second is possible, due in the storage card adopting block to map, the storage size of storage card is all more limited, so when electronic equipment merges the data data of carrying out in units of block, electronic equipment as much as possible selection combining time additional information few at least two data blocks merge, so before electronic equipment performs data merging, electronic equipment can detect in the storage area occupied by the data in predetermined logical address section at least two blocks whether storing and meet the second predetermined condition.Wherein, at least two blocks comprise at least one first kind block and at least one Second Type block, and the second predetermined condition is in the page of same position after comprising each piece of predetermined offset that skew is identical or different separately in first kind block compared with each piece in Second Type block has at most the data stored in a page to be valid data.
The second, if testing result is there are at least two blocks meeting the second predetermined condition, then by the predetermined offset that skew is corresponding separately of each piece in first kind block; First kind block after skew and the valid data in Second Type block are incorporated in other block and store, make all valid data including at least two blocks in other block.
If the testing result of electronic equipment is there are at least two blocks meeting the second predetermined condition, then electronic equipment can by the predetermined offset that skew is corresponding separately of each piece in first kind block, and the first kind block after skew and valid data in Second Type block are incorporated in other block and store, thus make all valid data including at least two blocks in other block.Wherein, predetermined offset is the figure place of all page collectives skew made to make the valid data stored in the page of at least two blocks to be merged into carry out storing in a block in data block.
Such as, electronic equipment detects BLOCK A and BLOCK B two data blocks, then now the valid data stored in all pages in BLOCK can down be offset 5 by electronic equipment, thus make to be in the page of same position in the BLOCK B after offseting and BLOCK A to only have the data stored in a page to be valid data, specifically please refer to Fig. 4, wherein predetermined offset is 5, certainly when specific implementation, still down offset in order to the page in mark data block up offsets, electronic equipment can also arrange positive and negative values for predetermined offset, when the such as page set in block up offsets, predetermined offset is just, when page in block down offsets, predetermined offset is negative, and the present embodiment does not repeat them here.
When actual realization, the data block of more than three or three can be there is, wherein, have in one or two data blocks store valid data page skew predetermined offset after, can make to be in the page of same position only has the data stored in a page to be valid data, then now, electronic equipment can by after some data block skew predetermined offset in these data blocks, be merged in the data block of other free time with the valid data in other data block and store, the present embodiment does not repeat them here.
What need supplementary notes is a bit, store after in data to storage card at electronic equipment, electronic equipment can mark the data in page each in storage area, thus the data stored in which page are valid data to make electronic equipment to know, the data stored in which page are invalid datas; Certainly, when specific implementation, whether the data stored in the page that electronic equipment can also adopt other labeling methods to come in mark data block are valid data, and the present embodiment does not limit this.
The second point of needs supplementary notes is; after the data in predetermined logical address section back up by electronic equipment in units of block; do not deleted by user to make the data after backing up; or recovery when not carried out garbage reclamation by electronic equipment, the storage area occupied by the data after backup can be set to protection zone by electronic equipment.Wherein protection zone is read-only and forbids the region that is wiped free of, and the present embodiment does not repeat them here.
Step 203, backs up the mapping table corresponding to the data after backup.
In order to make electronic equipment can read according to logic magnetic disc address the content stored in storage card, after the data in predetermined logical address section back up by electronic equipment, the mapping table corresponding to the data after backup can back up by electronic equipment.
Concrete, in the first implementation, the step that the mapping table corresponding to the data after backup carries out backing up can comprise by electronic equipment: stored as the mapping table corresponding with the data after backup by the corresponding relation between the LBA (Logical Block Addressing) corresponding to the data after backup and physical block address.
Such as, electronic equipment is when data merge, valid data in BLOCK A and BLOCK B are moved in BLOCK C and stores, if the address of the logical block corresponding with physical block BLOCK A is X, the address of the logical block corresponding with physical block BLOCK B is Y, then now LBA (Logical Block Addressing) X and LBA (Logical Block Addressing) Y will correspond to physical block BLOCK C simultaneously, and the mapping table corresponding to data after the backup of also i.e. electronic equipment backup is that X corresponds to BLOCK C, and Y corresponds to BLOCK C.
In the implementation that the second is possible, the mapping table step carrying out backing up corresponding to the data after backup can comprise by electronic equipment: using the LBA (Logical Block Addressing) corresponding to the data after backup and physical block address and/or the corresponding relation between physical block address and the combination of predetermined offset as with backup after the corresponding mapping table of data store.
Such as, electronic equipment is when data merge, be merged in BLOCK with the data in BLOCK A after data in BLOCK B down being offset 5 and store, then set the address of the logical block corresponding with physical block BLOCK A as X, the address of the logical block corresponding with physical block BLOCK B is Y, then now LBA (Logical Block Addressing) X corresponds to BLOCK C, and LBA (Logical Block Addressing) Y corresponds to BLOCK C and predetermined offset 5, and the present embodiment does not repeat them here.
Concrete, because electronic equipment is when carrying out data backup, the block of the first kind at least two blocks has been carried out certain skew, when making electronic equipment read logical address, can not according to logical page (LPAGE) determination Physical Page thus read data, electronic equipment can will set up the predetermined offset of first kind block after offseting and the corresponding relation between the combination of physical block address and LBA (Logical Block Addressing), thus using this corresponding relation as the mapping item corresponding to this LBA (Logical Block Addressing), so electronic equipment can using LBA (Logical Block Addressing) and the in the corresponding relation between physical block address and the combination of predetermined offset and the corresponding relation between LBA (Logical Block Addressing) and physical block address one or two combination as with backup after the corresponding mapping table of data store, the present embodiment does not repeat them here.
It should be added that; in order to avoid the mapping table corresponding with the data after backup is deleted by user; thus make electronic equipment cannot read the data stored in storage card; also namely date restoring cannot be realized; after electronic equipment backs up the mapping table corresponding to the data after backup, the region occupied by the mapping table corresponding to the data after backup can also be set to protection zone by electronic equipment.Wherein, protection zone is read-only and forbids the region that is wiped free of, and the present embodiment does not repeat them here.Simultaneously, in order to whether the mapping table characterized corresponding to the data after backup is effective, electronic equipment can also arrange zone bit by the storage area occupied by mapping table, wherein, zone bit is for representing that the mapping table stored in storage area is effective, and the present embodiment also repeats no more at this.
The second point of needs supplementary notes is, when actual realization, user can ask the backup carrying out more than twice or twice, accordingly, electronic equipment can receive two or more data backup signal, then now can there is the data after two or more backup and the mapping table corresponding to data after each backup in storage card, this present embodiment is repeated no more.
In sum, the data being arranged in predetermined logical address section by backup reception data signal, thus are backed up according to data backup signal by the data back up method that the present embodiment provides, and are backed up by the mapping table corresponding to the data after backup; The data back up method that solving prior art provides can cause electronic equipment when carrying out data backup, needs by other utility appliance such as computer and data line, the problem not being suitable for all application scenarioss; Reach electronic equipment after receiving data backup signal, directly the data in predetermined logical address section can be backed up, and accordingly the mapping table corresponding to the data after backup is backed up, and do not need by any utility appliance, the effect going for all use scenes.
Embodiment three
Please refer to Fig. 5, it illustrates the method flow diagram of the data back up method that the embodiment of the present invention three provides, this data back up method may be used for including in the electronic equipment of the storage card adopting block to map, and this data back up method can comprise:
Step 301, backup reception data signal;
Use in the process of electronic equipment user, in order to can loss of data in the electronic device time, recover the data of having lost, user can ask some data in electronic equipment to back up, accordingly, electronic equipment can receive data backup signal.
The data being arranged in described predetermined logical address section under the current backup moment are merged by step 302 in units of block, make the storage area occupied by data after merging be less than the storage area initially occupied;
Because electronic equipment is when performing deletion action or Data Update operation, the data stored in the page in the storage area of storage card can be made to become invalid data, so the storage space in order to discharge the page storing invalid data, after electronic equipment receives the data backup signal of user's input, the data being arranged in predetermined logical address section can merge by electronic equipment; But, in the storage card mapped owing to adopting block, electronic equipment can only manage block, the concrete page that can not manage, so when electronic equipment carries out Data Data merging, the data being arranged in predetermined logical address section under the current backup moment can merge by electronic equipment in units of block, make the storage area occupied by data after merging be less than the storage area initially occupied.Concrete, the step that electronic equipment carries out data merging can comprise the following two kinds implementation.
In the implementation that the first is possible, the data being arranged in predetermined logical address section under the current backup moment merge by electronic equipment in units of block, and the step making the storage area occupied by data after merging be less than the storage area initially occupied can comprise:
First, detect in the storage area occupied by data in predetermined logical address section and whether there are at least two blocks meeting the first predetermined condition, the first predetermined condition comprises in the page being in same position at least two blocks has at most the data stored in a page to be valid data;
The second, if testing result is there are at least two blocks meeting the first predetermined condition, then the valid data stored at least two blocks is incorporated into other block and stores, make all valid data including at least two blocks in other block.
It should be noted that, the first the possible implementation in the step 202 of this and embodiment two is similar, and detailed technology detail with reference embodiment two, the present embodiment does not repeat them here.
In the implementation that the second is possible, the data being arranged in predetermined logical address section under the current backup moment merge by electronic equipment in units of block, and the step making the storage area occupied by data after merging be less than the storage area initially occupied can comprise:
The first, detect in the storage area occupied by data in predetermined logical address section whether there are at least two blocks meeting the second predetermined condition; At least two blocks comprise at least one first kind block and at least one Second Type block, and the second predetermined condition is in the page of same position after comprising each piece of predetermined offset that skew is identical or different separately in first kind block compared with each piece in Second Type block has at most the data stored in a page to be valid data;
The second, if testing result is there are at least two blocks meeting the second predetermined condition, then by the predetermined offset that skew is corresponding separately of each piece in first kind block; First kind block after skew and the valid data in Second Type block are incorporated in other block and store, make all valid data including at least two blocks in other block.
It should be noted that, the possible implementation of the second in the step 202 of this and embodiment two is similar, and detailed technology detail with reference embodiment two, the present embodiment does not repeat them here.
What need supplementary notes is a bit, store after in data to storage card at electronic equipment, electronic equipment can mark the data in page each in storage area, thus the data stored in which page are valid data to make electronic equipment to know, the data stored in which page are invalid datas; Certainly, when specific implementation, whether the data stored in the page that electronic equipment can also adopt other labeling methods to come in mark data block are valid data, and the present embodiment does not limit this.
The second point of needs supplementary notes is; after the data in predetermined logical address section back up by electronic equipment in units of block; do not deleted by user to make the data after backing up; or recovery when not carried out garbage reclamation by electronic equipment, the storage area occupied by the data after backup can be set to protection zone by electronic equipment.Wherein protection zone is read-only and forbids the region that is wiped free of, and the present embodiment does not repeat them here.
Step 303, backs up the mapping table corresponding to the data after backup;
In order to make electronic equipment can read according to logic magnetic disc address the content stored in storage card, after the data in predetermined logical address section back up by electronic equipment, the mapping table corresponding to the data after backup can back up by electronic equipment.
Concrete, in the first implementation, the step that the mapping table corresponding to the data after backup carries out backing up can comprise by electronic equipment: stored as the mapping table corresponding with the data after backup by the corresponding relation between the LBA (Logical Block Addressing) corresponding to the data after backup and physical block address.
In the implementation that the second is possible, the mapping table step carrying out backing up corresponding to the data after backup can comprise by electronic equipment: using the LBA (Logical Block Addressing) corresponding to the data after backup and physical block address and/or the corresponding relation between physical block address and the combination of predetermined offset as with backup after the corresponding mapping table of data store.
Need supplementary notes a bit, the step 203 in this step and embodiment two is similar, and detailed technology detail with reference embodiment two, the present embodiment does not repeat them here.
Need supplementary notes on the other hand; in order to avoid the mapping table corresponding with the data after backup is deleted by user; thus make electronic equipment cannot read the data stored in storage card; also namely date restoring cannot be realized; after electronic equipment backs up the mapping table corresponding to the data after backup, the region occupied by the mapping table corresponding to the data after backup can also be set to protection zone by electronic equipment.Wherein, protection zone is read-only and forbids the region that is wiped free of, and the present embodiment does not repeat them here.Simultaneously, in order to whether the mapping table characterized corresponding to the data after backup is effective, electronic equipment can also arrange zone bit by the storage area occupied by mapping table, wherein, zone bit is for representing that the mapping table stored in storage area is effective, and the present embodiment also repeats no more at this.
Step 304, receives date restoring signal;
After electronic equipment is to the data backup in storage card, when user needs to carry out date restoring signal, user can input date restoring signal in the electronic device, and accordingly, electronic equipment can receive date restoring signal.When actual realization, electronic equipment is after receiving date restoring signal, and can enter rebooting status, the present embodiment does not limit this, and the present embodiment carries out restarting for electronic equipment.
It should be added that, the data stored in electronic equipment is to storage card have been carried out twice or have repeatedly been backed up, also the data namely after backup and the mapping table corresponding to data after backup have two groups or more than two, when data often after group backup and mapping table correspond to different backup times, the step that electronic equipment receives date restoring signal can comprise:
The first, receive the selection signal being used for selecting a backup time in two or more backup time;
User is when carrying out date restoring to electronic equipment, the state corresponding to data after the backup of any one backup time returned in two or more backup time can be selected, so now, electronic equipment can receive the selection signal for selecting a backup time in two or more backup time.
The second, the mapping table corresponding with the backup time selected is set to effectively, and effective mapping table will be set to as date restoring signal;
After electronic equipment receives selection signal, the mapping table corresponding with the backup time selected can be set to effectively by electronic equipment, thus will be set to effective mapping table as date restoring signal.
Step 305, according to the mapping table stored in date restoring signal-obtaining storage card;
When electronic equipment starts to restart, electronic equipment can according to the mapping table stored in date restoring signal-obtaining storage card.This that is, after electronic equipment receives date restoring signal, the mapping table stored in storage card can be set to run mode by electronic equipment, and the mapping table being in run mode is before carried out deleting or preserving, thus when electronic equipment is restarted, electronic equipment can read the mapping table corresponding to the data after backing up being in run mode.
It should be added that, when the date restoring signal that electronic equipment receives is signal when being set to effective by the zone bit of the mapping table corresponding with the backup time selected, electronic equipment can read in storage card the mapping table be set to corresponding to effective zone bit, and the present embodiment repeats no more this.
Step 306, reads the data after backup according to mapping table;
Because electronic equipment is in the process of restarting, electronic equipment can read data corresponding in logical address, logical address can be converted to LBA (Logical Block Addressing) and the address offset in logical block by electronic equipment, and at least one in the corresponding relation stored in storage card between LBA (Logical Block Addressing) and physical block address and LBA (Logical Block Addressing) and the corresponding relation between physical block address and the combination of predetermined offset, so after electronic equipment reads mapping table, electronic equipment can read the data after the backup stored in storage card.
Such as, with the mapping table of electronic equipment backup for LBA (Logical Block Addressing) X corresponds to BLOCK C(list item 1), and LBA (Logical Block Addressing) Y corresponds to BLOCK C and predetermined offset 5(list item 2), then when electronic equipment reads logical address block X, electronic equipment can read the data in physical block BLOCK C according to the situation of the valid data stored in BLOCK A; When electronic equipment reads logical address Y, electronic equipment can read according to the situation of the valid data stored in BLOCK B and predetermined offset the data read in physical block BLOCK C, specifically please refer to Fig. 6.
Step 307, loads the data after the backup read.
After data after electronic equipment reads backup, electronic equipment can load the data after the backup read, thus realizes date restoring.
In sum, the data being arranged in predetermined logical address section by backup reception data signal, thus are backed up according to data backup signal by the data back up method that the present embodiment provides, and are backed up by the mapping table corresponding to the data after backup; The data back up method that solving prior art provides can cause electronic equipment when carrying out data backup, needs by other utility appliance such as computer and data line, the problem not being suitable for all application scenarioss; Reach electronic equipment after receiving data backup signal, directly the data in predetermined logical address section can be backed up, and accordingly the mapping table corresponding to the data after backup is backed up, and do not need by any utility appliance, the effect going for all use scenes.In the present embodiment simultaneously, after the mapping table that electronic equipment backup is corresponding with the data after backup, electronic equipment receives date restoring signal, and according to date restoring signal-obtaining mapping table thus read and load backup after data, reach electronic equipment can not need to carry out date restoring when utility appliance, thus go for the effect of all application scenarioss.
It should be added that, the present embodiment is just the electronic equipment comprising the storage card adopting block to map for electronic equipment, when actual realization, electronic equipment can also be comprise to adopt electronic equipment the present embodiment of the storage card of mixed-use developments not limit this.
Embodiment four
Please refer to Fig. 7, it illustrates the block diagram of the data backup device that the embodiment of the present invention is to provide, this data backup device may be used for including in the electronic equipment of the storage card adopting block to map, and this data backup device can realize becoming all or part of of electronic equipment by software, hardware or both combinations, and this data backup device can comprise: the first receiver module 410, first backup module 420 and the second backup module 430;
First receiver module 410, for backup reception data signal;
The data being arranged in predetermined logical address section are backed up for the described data backup signal received according to described first receiver module 410 by the first backup module 420;
Second backup module 420, for the mapping table corresponding to the data after backup is backed up, described mapping table comprises the corresponding relation between LBA (Logical Block Addressing) corresponding to the data after described backup and preset physical address, and described preset physical address comprises the combination of physical block address and/or physical block address and predetermined offset.
In sum, the data being arranged in predetermined logical address section by backup reception data signal, thus are backed up according to data backup signal by the data backup device that the present embodiment provides, and are backed up by the mapping table corresponding to the data after backup; The data back up method that solving prior art provides can cause electronic equipment when carrying out data backup, needs by other utility appliance such as computer and data line, the problem not being suitable for all application scenarioss; Reach electronic equipment after receiving data backup signal, directly the data in predetermined logical address section can be backed up, and accordingly the mapping table corresponding to the data after backup is backed up, and do not need by any utility appliance, the effect going for all use scenes.
Embodiment five
Please refer to Fig. 8, it illustrates the block diagram of the data backup device that the embodiment of the present invention five provides, this data backup device may be used for including in the electronic equipment of the storage card adopting block to map, and this data backup device can realize becoming all or part of of electronic equipment by software, hardware or both combinations, and this data backup device can comprise: the first receiver module 410, first backup module 420 and the second backup module 430;
First receiver module 410, for backup reception data signal;
The data being arranged in predetermined logical address section are backed up for the described data backup signal received according to described first receiver module 410 by the first backup module 420;
Second backup module 420, for the mapping table corresponding to the data after backup is backed up, described mapping table comprises the corresponding relation between LBA (Logical Block Addressing) corresponding to the data after described backup and preset physical address, and described preset physical address comprises the combination of physical block address and/or physical block address and predetermined offset.
Preferably, the storage area of described storage card comprises at least one block,
Described first backup module 420, also for the data being arranged in described predetermined logical address section under the current backup moment being merged in units of block, makes the storage area occupied by data after merging be less than the storage area initially occupied.
Preferably, please refer to Fig. 9, each piece in described storage area comprises at least one page, and described first backup module 420, comprising: the first detecting unit 421 and the first backup units 422;
First detecting unit 421, for detecting at least two blocks whether existing in the storage area occupied by the data in described predetermined logical address section and meet the first predetermined condition, being at least two blocks described in described first predetermined condition comprises in the page of same position and having at most the data stored in a page to be valid data;
First backup units 422, if the testing result for described first detecting unit 421 is there are at least two blocks meeting described first predetermined condition, then the valid data stored in described at least two blocks are incorporated into other block to store, make all valid data of at least two blocks described in including in other block described.
Preferably, described second backup module 430, also for being stored as the mapping table corresponding with the data after described backup by the corresponding relation between the LBA (Logical Block Addressing) corresponding to the data after backup and physical block address.
Preferably, please refer to Figure 10, each piece in described storage area comprises at least one page, and described first backup module 420, comprising: the second detecting unit 423 and the second backup units 424;
Second detecting unit 423, for detecting at least two blocks whether existing in the storage area occupied by the data in described predetermined logical address section and meet the second predetermined condition; Described at least two blocks comprise at least one first kind block and at least one Second Type block, and described second predetermined condition is in the page of same position after comprising each piece of predetermined offset that skew is identical or different separately in described first kind block compared with each piece in Second Type block has at most the data stored in a page to be valid data;
Second backup units 424, if be there are at least two blocks meeting described second predetermined condition for the testing result of described second detecting unit 423, then by the predetermined offset that skew is corresponding separately of each piece in described first kind block; Described first kind block after skew and the valid data in described Second Type block are incorporated in other block and store, make all valid data of at least two blocks described in including in other block described.
Preferably, described second backup module 430, also for using LBA (Logical Block Addressing) and the physical block address corresponding to the data after backup and/or the corresponding relation between physical block address and the combination of predetermined offset as with described backup after the corresponding mapping table of data store.
Preferably, described data backup device, also comprises:
First setting module 440, for the storage area occupied by the data after described backup is set to protection zone, described protection zone is read-only and forbids the region that is wiped free of.
Preferably, described data backup device, also comprises:
Second setting module 450, for the storage area occupied by described mapping table is set to protection zone, described protection zone is read-only and forbids the region that is wiped free of;
3rd setting module 460, arranges zone bit for the storage area occupied by described mapping table, and whether described zone bit is effective for representing in described storage area the described mapping table stored.
Preferably, please refer to Figure 11, described device also comprises:
Second receiver module 470, for receiving date restoring signal;
First read module 480, for the mapping table stored in storage card described in the described date restoring signal-obtaining that receives according to described second receiver module 470;
Second read module 490, reads the data after described backup for the described mapping table read according to described first read module 480;
Data import module 500, reads the data after the described backup that reads of 490 modules for loading described second.
Preferably, the mapping table corresponding to data after data after described backup and described backup has two groups or more than two, often organize the data after described backup and described mapping table and correspond to different backup times, described second receiver module 470, comprising: signal receiving unit 471 and information setting unit 472;
Signal receiving unit 471, for receiving the selection signal for selecting a backup time in two or more backup time;
Information setting unit 472, for being set to effectively by the mapping table corresponding with the backup time selected, and will be set to effective mapping table as described date restoring signal;
Accordingly, described first read module 480, is also set to effective mapping table for reading in described storage card.
In sum, the data being arranged in predetermined logical address section by backup reception data signal, thus are backed up according to data backup signal by the data backup device that the present embodiment provides, and are backed up by the mapping table corresponding to the data after backup; The data back up method that solving prior art provides can cause electronic equipment when carrying out data backup, needs by other utility appliance such as computer and data line, the problem not being suitable for all application scenarioss; Reach electronic equipment after receiving data backup signal, directly the data in predetermined logical address section can be backed up, and accordingly the mapping table corresponding to the data after backup is backed up, and do not need by any utility appliance, the effect going for all use scenes.
It should be noted that: the data backup device that above-described embodiment provides is when carrying out data backup, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, inner structure by equipment is divided into different functional modules, to complete all or part of function described above.In addition, the embodiment of the method for the data backup device that above-described embodiment provides and data back up method belongs to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (21)
1. a data back up method, is characterized in that, for including in the electronic equipment of the storage card adopting block to map, described method comprises:
Backup reception data signal;
According to described data backup signal, the data being arranged in predetermined logical address section are backed up;
Mapping table corresponding to data after backup is backed up, described mapping table comprises the corresponding relation between LBA (Logical Block Addressing) corresponding to the data after described backup and preset physical address, and described preset physical address comprises the combination of physical block address and/or physical block address and predetermined offset.
2. data back up method according to claim 1, is characterized in that, the storage area of described storage card comprises at least one block, describedly the data being arranged in predetermined logical address section is backed up according to described data backup signal, comprising:
The data being arranged in described predetermined logical address section under the current backup moment are merged in units of block, makes the storage area occupied by data after merging be less than the storage area initially occupied.
3. data back up method according to claim 2, is characterized in that, each piece in described storage area comprises at least one page, describedly the data being arranged in described predetermined logical address section under the current backup moment is merged in units of block, comprising:
Detect at least two blocks whether existing in the storage area occupied by data in described predetermined logical address section and meet the first predetermined condition, be at least two blocks described in described first predetermined condition comprises in the page of same position and have at most the data stored in a page to be valid data;
If testing result is there are at least two blocks meeting described first predetermined condition, then the valid data stored in described at least two blocks is incorporated into other block and stores, make all valid data of at least two blocks described in including in other block described.
4. data back up method according to claim 3, is characterized in that, described by backup after data corresponding to mapping table back up, comprising:
Corresponding relation between LBA (Logical Block Addressing) corresponding to data after backup and physical block address is stored as the mapping table corresponding with the data after described backup.
5. data back up method according to claim 2, is characterized in that, each piece in described storage area comprises at least one page, describedly the data being arranged in described predetermined logical address section under the current backup moment is merged in units of block, comprising:
Detect at least two blocks whether existing in the storage area occupied by data in described predetermined logical address section and meet the second predetermined condition; Described at least two blocks comprise at least one first kind block and at least one Second Type block, and described second predetermined condition is in the page of same position after comprising each piece of predetermined offset that skew is identical or different separately in described first kind block compared with each piece in Second Type block has at most the data stored in a page to be valid data;
If testing result is there are at least two blocks meeting described second predetermined condition, then by the predetermined offset that skew is corresponding separately of each piece in described first kind block; Described first kind block after skew and the valid data in described Second Type block are incorporated in other block and store, make all valid data of at least two blocks described in including in other block described.
6. data back up method according to claim 5, is characterized in that, described by backup after data corresponding to mapping table back up, comprising:
Using LBA (Logical Block Addressing) and the physical block address corresponding to the data after backup and/or the corresponding relation between physical block address and the combination of predetermined offset as with described backup after the corresponding mapping table of data store.
7., according to the arbitrary described data back up method of claim 1 to 6, it is characterized in that, described according to described data backup signal the data being arranged in predetermined logical address section are backed up after, described method also comprises:
Storage area occupied by data after described backup is set to protection zone, and described protection zone is read-only and forbids the region that is wiped free of.
8., according to the arbitrary described data back up method of claim 1 to 7, it is characterized in that, described mapping table corresponding to data after backup is backed up after, described method also comprises:
Storage area occupied by described mapping table is set to protection zone, and described protection zone is read-only and forbids the region that is wiped free of;
Storage area occupied by described mapping table arranges zone bit, and whether described zone bit is effective for representing in described storage area the described mapping table stored.
9., according to the arbitrary described data back up method of claim 1 to 8, it is characterized in that, described mapping table corresponding to data after backup is backed up after, described method also comprises:
Receive date restoring signal;
The mapping table stored in storage card according to described date restoring signal-obtaining;
The data after described backup are read according to described mapping table;
Load the data after the described backup read.
10. data back up method according to claim 9, it is characterized in that, the mapping table corresponding to data after data after described backup and described backup has two groups or more than two, often organize the data after described backup and described mapping table and correspond to different backup times, described reception date restoring signal, comprising:
Receive the selection signal being used for selecting a backup time in two or more backup time;
The mapping table corresponding with the backup time selected is set to effectively, and effective mapping table will be set to as described date restoring signal;
The mapping table stored in described storage card according to described date restoring signal-obtaining, comprising:
Read in described storage card and be set to effective mapping table.
11. 1 kinds of data backup devices, is characterized in that, for including in the electronic equipment of the storage card adopting block to map, described device comprises:
First receiver module, for backup reception data signal;
The data being arranged in predetermined logical address section are backed up for the described data backup signal received according to described first receiver module by the first backup module;
Second backup module, for the mapping table corresponding to the data after backup is backed up, described mapping table comprises the corresponding relation between LBA (Logical Block Addressing) corresponding to the data after described backup and preset physical address, and described preset physical address comprises the combination of physical block address and/or physical block address and predetermined offset.
12. data backup devices according to claim 11, is characterized in that, the storage area of described storage card comprises at least one block,
Described first backup module, also for the data being arranged in described predetermined logical address section under the current backup moment being merged in units of block, makes the storage area occupied by data after merging be less than the storage area initially occupied.
13. data backup devices according to claim 12, is characterized in that, each piece in described storage area comprises at least one page, and described first backup module, comprising:
First detecting unit, for detecting at least two blocks whether existing in the storage area occupied by the data in described predetermined logical address section and meet the first predetermined condition, being at least two blocks described in described first predetermined condition comprises in the page of same position and having at most the data stored in a page to be valid data;
First backup units, if the testing result for described first detecting unit is there are at least two blocks meeting described first predetermined condition, then the valid data stored in described at least two blocks are incorporated into other block to store, make all valid data of at least two blocks described in including in other block described.
14. data backup devices according to claim 13, is characterized in that,
Described second backup module, also for being stored as the mapping table corresponding with the data after described backup by the corresponding relation between the LBA (Logical Block Addressing) corresponding to the data after backup and physical block address.
15. data backup devices according to claim 12, is characterized in that, each piece in described storage area comprises at least one page, and described first backup module, comprising:
Second detecting unit, for detecting at least two blocks whether existing in the storage area occupied by the data in described predetermined logical address section and meet the second predetermined condition; Described at least two blocks comprise at least one first kind block and at least one Second Type block, and described second predetermined condition is in the page of same position after comprising each piece of predetermined offset that skew is identical or different separately in described first kind block compared with each piece in Second Type block has at most the data stored in a page to be valid data;
Second backup units, if be there are at least two blocks meeting described second predetermined condition for the testing result of described second detecting unit, then by the predetermined offset that skew is corresponding separately of each piece in described first kind block; Described first kind block after skew and the valid data in described Second Type block are incorporated in other block and store, make all valid data of at least two blocks described in including in other block described.
16. data backup devices according to claim 15, is characterized in that,
Described second backup module, also for using LBA (Logical Block Addressing) and the physical block address corresponding to the data after backup and/or the corresponding relation between physical block address and the combination of predetermined offset as with described backup after the corresponding mapping table of data store.
17. according to claim 11 to 16 arbitrary described data backup devices, and it is characterized in that, described data backup device, also comprises:
First setting module, for the storage area occupied by the data after described backup is set to protection zone, described protection zone is read-only and forbids the region that is wiped free of.
18. according to claim 11 to 17 arbitrary described data backup devices, and it is characterized in that, described data backup device, also comprises:
Second setting module, for the storage area occupied by described mapping table is set to protection zone, described protection zone is read-only and forbids the region that is wiped free of;
3rd setting module, arranges zone bit for the storage area occupied by described mapping table, and whether described zone bit is effective for representing in described storage area the described mapping table stored.
19. according to claim 11 to 18 arbitrary described data backup devices, and it is characterized in that, described device also comprises:
Second receiver module, for receiving date restoring signal;
First read module, for the mapping table stored in storage card described in the described date restoring signal-obtaining that receives according to described second receiver module;
Second read module, the described mapping table for reading according to described first read module reads the data after described backup;
Data import module, for loading the data after described backup that described second read module reads.
20. data backup devices according to claim 19, it is characterized in that, the mapping table corresponding to data after data after described backup and described backup has two groups or more than two, often organize the data after described backup and described mapping table and correspond to different backup times, described second receiver module, comprising:
Signal receiving unit, for receiving the selection signal for selecting a backup time in two or more backup time;
Information setting unit, for being set to effectively by the mapping table corresponding with the backup time selected, and will be set to effective mapping table as described date restoring signal;
Accordingly, described first read module, is also set to effective mapping table for reading in described storage card.
21. 1 kinds of electronic equipments, is characterized in that, it comprise as arbitrary in claim 11 to 20 as described in data backup device.
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