CN101634938A - Data migration method and data migration device of solid state disk and solid state disk - Google Patents
Data migration method and data migration device of solid state disk and solid state disk Download PDFInfo
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Abstract
The embodiment of the invention relates to a data migration method and a data migration device of a solid state disk and the solid state disk. The data migration method comprises the following steps: reading first data of a first data block in a solid state storage unit in a data register of the storage unit, and naming the first data of the data register with read-in data as second data; checking and correcting the second data; and writing the checked and corrected second data in a second data block of the storage unit. The embodiment of the invention improves the efficiency of data migration, reduces the time of the data migration and improves the data rate of the data migration.
Description
Technical field
The present invention relates to computer technology, relate in particular to a kind of data migration method, data migration device and solid state hard disc of solid state hard disc.
Background technology
Solid state hard disc (Solid State Disk; Hereinafter to be referred as: SSD), as the speedy storage equipment of a new generation, be made into notebook hard disk, micro harddisk, storage card or flash disk etc. usually, SSD adopts the flash chip as storage medium usually.In the process that the data of storing in to SSD are operated, the data of storing in the flash chip need be moved to another data block from a data block of chip internal usually.
In the data migration method of existing solid state hard disc, SSD adopts the copyback order to carry out data migtation.When needs read the data of migration, adopt error correcting code (the Error Correction Code among the SSD; Hereinafter to be referred as: EEC) module is carried out error correction to these data.Because error in data taking place in the process that adopts the copyback order that data are moved easily, and error in data constantly adds up in data migration process, can't correct the data that mistake occurs owing to correct the restriction of figure place thereby cause ECC.
In the data migration method of another kind of solid state hard disc, SSD adopts the copyback order to carry out data migtation, and will adopt ECC module check whether to have error in data in data read (reading in) the SSD buffer memory of migration.If migration data makes a mistake, then adopt the copyback order to carry out data migtation once more.Because this method has carried out once reading the process of migration data after finishing data migtation, if migration data makes a mistake, then increased data migration process one time, caused that efficiency of data migration is low, the time is long.
Summary of the invention
The data migration method, data migration device and the solid state hard disc that the purpose of this invention is to provide solid state hard disc, the mistake that prior art data migtation efficient is low to solve, produce in the data migtation is difficult for being corrected and moving the long problem that expends time in.
For achieving the above object, the embodiment of the invention provides a kind of data migration method of solid state hard disc, comprising:
First data in first data block of solid state storage unit are read in data register in the described storage unit, are second data with described first numerical nomenclature that reads in the described data register;
Described second data are checked and proofreaied and correct;
To write second data block in the described storage unit through second data of inspection and correction.
The embodiment of the invention also provides a kind of data migration device of solid state hard disc, comprising:
Read module is used for first data of first data block of solid state storage unit are read in data register in the described storage unit, is second data with described first numerical nomenclature that reads in described data register;
Correction module is used for described second data are checked and proofreaied and correct;
Writing module is used for and will writes second data block of described storage unit through second data of checking and proofread and correct.
The embodiment of the invention provides a kind of solid state hard disc again, comprise control module, storage unit and data migration device, described data migration device is used for first data of first data block of described storage unit are read in data register in the described storage unit, is second data with described first data of reading in the described data register; Described second data are checked and proofreaied and correct; And will write second data block in the described storage unit through described second data of checking and proofread and correct.
Therefore, the data migration method of the solid state hard disc that the embodiment of the invention provides, data migration device and solid state hard disc, adopt the copyback order when the flash chip internal carries out data migtation, migration data to be checked and proofreaied and correct by the control module among the SSD, improved efficiency of data migration, reduce the data migtation time, improved the data transfer rate of data migtation.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing the embodiment of the invention below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The data migration method process flow diagram of the solid state hard disc that Fig. 1 provides for one embodiment of the invention;
The data migration method process flow diagram one of the solid state hard disc that Fig. 2 A provides for another embodiment of the present invention;
The data migration method flowchart 2 of the solid state hard disc that Fig. 2 B provides for another embodiment of the present invention;
The data migration device structural representation of the solid state hard disc that Fig. 3 provides for one embodiment of the invention;
The data migration device structural representation one of the solid state hard disc that Fig. 4 A provides for another embodiment of the present invention;
The data migration device structural representation two of the solid state hard disc that Fig. 4 B provides for another embodiment of the present invention;
The solid state hard disc structural representation that Fig. 5 provides for one embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The data migration method process flow diagram of the solid state hard disc that Fig. 1 provides for one embodiment of the invention, as shown in Figure 1, this method comprises:
Step 101, first data in first data block of solid state storage unit being read in data register in the storage unit, is second data with first numerical nomenclature that reads in the data register;
SSD is made of control module and storage unit usually, and the storage unit of SSD is generally the flash chip, has a data register (data register) and a plurality of data block in this chip.The data block of data to be migrated from the flash chip to be moved to another data block, at first need data to be migrated are read in data register in (read) flash chip, and the process of data to be migrated being read in data register is finished by the copyback order, be specially: the control module among the SSD is assigned the copyback order to the flash chip, and the flash chip reads in data to be migrated in the data register according to this order.
Step 102, second data are checked and proofreaied and correct;
Concrete, in the copyback order that the flash chip is assigned according to the SSD control module data to be migrated are read in the process of data register, because the reasons such as hardware interference among " bit reversal " or the SSD, second data and first data to be migrated that often cause reading in the data register are inconsistent.Can adopt relative method inspection to this mistake, be specially and whether exist in comparison second data and the inconsistent data of first data, and the misdata in second data proofreaied and correct, make second data consistent with first data, proofreading and correct with the inconsistent data of first data in second data is specifically as follows: control module is assigned the copyback order to the flash unit, directly correct data is write data register.Second data are checked and the process of proofreading and correct can realize by at the flash chip internal relevant hardware circuit being set.In the copyback order that the flash chip is assigned according to the SSD control module data to be migrated are read in the process of data register, also may also there be misdata owing to first data itself exist misdata to cause reading in second data in the data register, in this case, can be earlier second data be read in ECC module in the SSD control module, by whether having misdata in these module check second data, and misdata is proofreaied and correct.To the misdata in second data proofread and correct specifically also can for: control module is assigned the copyback order to the flash unit, directly correct data is write data register.
Step 103, will be through second data block in the second data write storage unit of checking and proofreading and correct.
After second data being checked and are proofreaied and correct, if do not exist and the inconsistent misdata of first data in second data, then the control module of SSD is assigned the copyback order to the flash chip, directly the data register in the control flash chip writes purpose migration data module, i.e. second data block with second data.If exist and the inconsistent misdata of first data in second data, then after second data were proofreaied and correct, second data that control module will be assigned after copyback order control data register will be proofreaied and correct to the flash chip write purpose migration data module.
The data migration method of the solid state hard disc that present embodiment provides, adopt the copyback order when the flash chip internal carries out data migtation, migration data to be checked and proofreaied and correct by the control module among the SSD, improved efficiency of data migration, reduce the data migtation time, improved the data transfer rate of data migtation.
The data migration method process flow diagram one of the solid state hard disc that Fig. 2 A provides for another embodiment of the present invention, shown in Fig. 2 A, this method comprises:
Step 202-203 is specially second data and first data is carried out by bit comparison, thereby can check out whether exist in second data and the inconsistent data of first data for second data being checked and being proofreaied and correct.After second data are checked, according to first data inconsistent data are proofreaied and correct again.This step can be finished by at the flash chip internal relevant hardware circuit being set.
Second data are checked and the process of proofreading and correct can also be carried out in the control module in solid state hard disc, second data are checked and proofreaied and correct by the ECC module in the control module.Referring to Fig. 2 B, at first second data are read in control module, this step can be assigned copyback to flash by control module and order and finish; Wherein, first data that are stored in the SSD storage unit also have error correcting code, concrete, when SSD received the user from first data of some equipment (being generally computing machine) storages, SSD was by Bo Si-Cha Dehuli-Huo Kun lattice nurse coding (Bose-Chaudhuri-Hocquenghem Code; Hereinafter to be referred as: BCH) or Reed Solomon code (Reed-Solomon codes; Hereinafter to be referred as: RS) algorithm carries out computing to first data, generates error correcting code, then these first data and error correcting code is together write flash.Therefore, first data that are stored among the flash of SSD have its error correcting code, read in first data in the data register, and promptly second data also comprise this error correcting code.At this moment, Dui Ying step 202-step 203 is as follows:
Concrete, the ECC module in the control module can be carried out computing to second data and error correcting code according to the ECC algorithm, judges whether there is misdata in second data according to operation result, and the misdata in second data is proofreaied and correct.After misdata in second data proofreaied and correct, control module was assigned the copyback order to flash, and correct data are write data register.
After second data having been carried out inspection and having proofreaied and correct, second data in the data register are the correct data after overcorrect at this moment, the control module of SSD directly sends the copyback order to data register, the control data register writes purpose migration data module, i.e. second data module with second data.
The data migration method of the solid state hard disc that present embodiment provides, when adopting the copyback order, the control module among the SSD carries out in the process of data migtation at the flash chip internal, data to be migrated are read in ECC module to the SSD to be checked and proofreaies and correct, improved efficiency of data migration, reduced the data migtation time, improved the data transfer rate of data migtation, present embodiment also provides in carrying out data migration process, treating migration data at the flash chip internal checks and proofreaies and correct, because this scheme has reduced the process of migration data being read the flash chip, therefore, further reduce the time of data migtation, improved the data transfer rate of data migtation.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of the foregoing description is to instruct relevant hardware to finish by program, this program can be stored in the computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.
The data migration device structural representation of the solid state hard disc that Fig. 3 provides for one embodiment of the invention, as shown in Figure 3, this device comprises: read module 31, correction module 32 and writing module 33; Wherein, read module 31 is used for first data of first data block of solid state storage unit are read in data register in the storage unit, is second data with first numerical nomenclature that reads in data register; Correction module 32 is used for second data are checked and proofreaied and correct; Writing module 33 is used for second data block with the second data write storage unit of process inspection and correction.
SSD is made of control module and storage unit usually, and the storage unit of SSD is generally the flash chip, has a data register and a plurality of data block in this chip.The data block of data to be migrated from the flash chip to be moved to another data block, read module 31 at first reads in data to be migrated data register in the flash chip, and the process of data to be migrated being read in data register is finished by the copyback order, be specially: the control module among the SSD is assigned the copyback order to the flash chip, and the flash chip reads in data to be migrated in the data register according to this order.In the copyback order that the flash chip is assigned according to the SSD control module data to be migrated are read in the process of data register, because the reasons such as hardware interference among " bit reversal " or the SSD, tend to occur mistake, second data and first data to be migrated that cause reading in the data register are inconsistent.In this case, whether correction module 32 can adopt relative method to check to exist in second data and the inconsistent misdata of first data, and the misdata in the data register is proofreaied and correct, and makes second data consistent with first data.At this moment, correction module 32 can be arranged on the flash chip internal, realizes by concrete hardware circuit.In the copyback order that the flash chip is assigned according to the SSD control module data to be migrated are read in the process of data register, also may also there be misdata owing to first data itself promptly exist misdata to cause reading in second data in the data register, in this case, correction module 32 can be arranged on the outside of flash chip, be specifically as follows the ECC module in the SSD control module, by whether having misdata in these module check second data, and misdata is proofreaied and correct.
After second data being checked and proofreaied and correct, if do not exist and the inconsistent misdata of first data in second data, then writing module 33 direct control data registers write purpose migration data module, i.e. second data module with second data.If exist and the inconsistent misdata of first data in second data, after correction module 32 control data register pair misdatas were proofreaied and correct, second data after will proofreading and correct by writing module 33 again write purpose migration data module.
The data migration device of the solid state hard disc that present embodiment provides, adopt the copyback order when the flash chip internal carries out data migtation, migration data to be checked and proofreaied and correct by the control module among the SSD, improved efficiency of data migration, reduce the data migtation time, improved the data transfer rate of data migtation.
The data migration device structural representation one of the solid state hard disc that Fig. 4 A provides for another embodiment of the present invention, shown in Fig. 4 A, this device comprises: read module 31, correction module 32 and writing module 33; Correction module 32 can comprise: comparison sub-module 321 and syndrome module 322; Comparison sub-module 321 is used for second data and first data are carried out by bit comparison; Syndrome module 322 is used for if comparison sub-module 321 compares second data to be existed and the inconsistent data of first data, then inconsistent data is proofreaied and correct.
Concrete, correction module 32 can be arranged on the flash chip internal, realizes by concrete hardware circuit, and the correction module 32 of flash chip internal can specifically comprise comparison sub-module 321 and syndrome module 322; Relatively submodule fast 321 is at first carried out by bit comparison second data and first data, thereby can check out whether exist in second data and the inconsistent data of first data.After second data were checked, syndrome module 322 was proofreaied and correct the misdata in second data according to first data.
The data migration device of the solid state hard disc that present embodiment provides, when adopting the copyback order, the control module among the SSD carries out in the process of data migtation at the flash chip internal, data to be migrated can be read in ECC module to the SSD checks and proofreaies and correct, improved efficiency of data migration, reduced the data migtation time, improved the data transfer rate of data migtation, present embodiment also provides in carrying out data migration process, treating migration data at the flash chip internal checks and proofreaies and correct, because this scheme has reduced the process of migration data being read the flash chip, therefore, further reduce the time of data migtation, improved the data transfer rate of data migtation.
The solid state hard disc structural representation that Fig. 5 provides for one embodiment of the invention, as shown in Figure 5, this device comprises: control module 1, storage unit 2 and data migration device 3; Data migration device 3 is used for first data of first data block of storage unit 2 are read in data register in the storage unit 2, is second data with first numerical nomenclature that reads in the data register; Second data are checked and proofreaied and correct; And will be through second data block in the second data write storage unit 2 of checking and proofreading and correct.
SSD is made of control module 1 and storage unit 2 usually, and the storage unit 2 of SSD is generally the flash chip, has a data register and a plurality of data block in this chip.The data block of data to be migrated from a flash chip to be moved to another data block, at first adopt the data migration device 3 of solid state hard disc to read in data register in the flash chip with migration data, tend to occur mistake and will read in the process of data register, thereby second data and first data to be migrated that cause reading in the data register are inconsistent with migration data.In this case, the data migration device 3 of solid state hard disc checks in second data whether exist and the inconsistent data of first data, and these misdatas are proofreaied and correct, and makes second data consistent with first data.Whether concrete inspection and trimming process can at first compare second data consistent with first data, if inconsistent, then to proofreading and correct with the inconsistent data of first data in second data.
Because first data that are stored in the SSD storage unit 2 have its error correcting code, concrete, when SSD receives the user from first data of some equipment (being generally computing machine) storages, SSD carries out computing by BCH or RS algorithm to first data, generate error correcting code, then these first data and error correcting code are together write flash.Therefore, first data that are stored among the flash of SSD have its error correcting code, read in first data in the data register, and promptly second data also comprise this error correcting code.Therefore, whether data migration device 3 can also judge in second data misdata according to error correcting code, if exist, then the misdata in second data is proofreaied and correct.After second data were proofreaied and correct, the data migration device 3 in the solid state hard disc write purpose migration data piece, i.e. second data block with second data.Detailed process repeats no more referring to previous embodiment.
The solid state hard disc that present embodiment provides, adopt the copyback order when the flash chip internal carries out data migtation, migration data to be checked and proofreaied and correct by the control module among the SSD, improved efficiency of data migration, reduce the data migtation time, improved the data transfer rate of data migtation.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1, a kind of data migration method of solid state hard disc is characterized in that, comprising:
First data in first data block of solid state storage unit are read in data register in the described storage unit, are second data with described first numerical nomenclature that reads in the described data register;
Described second data are checked and proofreaied and correct;
To write second data block in the described storage unit through second data of inspection and correction.
2, method according to claim 1 is characterized in that, described described second data are checked and are proofreaied and correct comprise:
Described second data and described first data are carried out by bit comparison;
If described second data exist and the inconsistent data of described first data, then described inconsistent data are proofreaied and correct.
3, method according to claim 1 is characterized in that, also comprises error correcting code in described first data, also comprises described error correcting code in described second data, described described second data are checked and are proofreaied and correct comprise:
Judge in described second data whether have misdata according to described error correcting code;
If exist, then the misdata in described second data proofreaied and correct.
4, method according to claim 3 is characterized in that, describedly judges in described second data whether exist misdata to comprise according to described error correcting code:
According to set algorithm described second data and described error correcting code are carried out computing, judge in described second data whether have misdata.
5, a kind of data migration device of solid state hard disc is characterized in that, comprising:
Read module is used for first data of first data block of solid state storage unit are read in data register in the described storage unit, is second data with described first numerical nomenclature that reads in described data register;
Correction module is used for described second data are checked and proofreaied and correct;
Writing module is used for and will writes second data block of described storage unit through second data of checking and proofread and correct.
6, device according to claim 5 is characterized in that, described correction module comprises:
Comparison sub-module is used for described second data and described first data are carried out by bit comparison;
The syndrome module is used for then described inconsistent data being proofreaied and correct if described comparison sub-module compares described second data to be existed and the inconsistent data of described first data.
7, device according to claim 5 is characterized in that, also comprises error correcting code in described first data, also comprises described error correcting code in described second data, and described correction module comprises:
Judge submodule, be used for judging according to described error correcting code whether described second data exist misdata;
Processing sub is used for then the misdata in described second data being proofreaied and correct when described judgement submodule is judged described second data and had misdata.
8, device according to claim 7 is characterized in that, described judgement submodule comprises:
Arithmetic element is used for according to set algorithm described second data and described error correcting code being carried out computing;
Processing unit is used for judging according to the operation result of described arithmetic element whether described second data exist misdata.
9, a kind of solid state hard disc, comprise: control module and storage unit, it is characterized in that, also comprise data migration device as each described solid state hard disc of claim 5-8, described data migration device is used for first data of first data block of described storage unit are read in data register in the described storage unit, is second data with described first numerical nomenclature that reads in the described data register; Described second data are checked and proofreaied and correct; And will write second data block in the described storage unit through described second data of checking and proofread and correct.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012022024A1 (en) * | 2010-08-17 | 2012-02-23 | 成都市华为赛门铁克科技有限公司 | Method and apparatus for moving data in memory device and memory device |
| CN103019883A (en) * | 2012-12-31 | 2013-04-03 | 华为技术有限公司 | Internal memory error correction method and system |
| CN103049582A (en) * | 2013-01-25 | 2013-04-17 | 苏州皓琪信息科技有限公司 | Automatic digital imaging and communications in medicine (DICOM) medical image data migration system and method |
| CN104123900A (en) * | 2014-07-25 | 2014-10-29 | 西安诺瓦电子科技有限公司 | LED (light-emitting diode) lamp panel calibration system and method |
| CN107301132A (en) * | 2017-06-09 | 2017-10-27 | 华中科技大学 | A kind of flash memory garbage reclamation optimization method |
| CN108415853A (en) * | 2018-03-15 | 2018-08-17 | 深圳市江波龙电子有限公司 | A kind of method, apparatus and storage device of garbage reclamation |
| CN110515646A (en) * | 2019-07-26 | 2019-11-29 | 华为技术有限公司 | A kind of difference upgrade method and relevant device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012022024A1 (en) * | 2010-08-17 | 2012-02-23 | 成都市华为赛门铁克科技有限公司 | Method and apparatus for moving data in memory device and memory device |
| CN103019883A (en) * | 2012-12-31 | 2013-04-03 | 华为技术有限公司 | Internal memory error correction method and system |
| CN103019883B (en) * | 2012-12-31 | 2015-08-26 | 华为技术有限公司 | A kind of internal memory error correction and system |
| CN103049582A (en) * | 2013-01-25 | 2013-04-17 | 苏州皓琪信息科技有限公司 | Automatic digital imaging and communications in medicine (DICOM) medical image data migration system and method |
| CN104123900A (en) * | 2014-07-25 | 2014-10-29 | 西安诺瓦电子科技有限公司 | LED (light-emitting diode) lamp panel calibration system and method |
| CN107301132A (en) * | 2017-06-09 | 2017-10-27 | 华中科技大学 | A kind of flash memory garbage reclamation optimization method |
| CN108415853A (en) * | 2018-03-15 | 2018-08-17 | 深圳市江波龙电子有限公司 | A kind of method, apparatus and storage device of garbage reclamation |
| CN110515646A (en) * | 2019-07-26 | 2019-11-29 | 华为技术有限公司 | A kind of difference upgrade method and relevant device |
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