CN104252417A - Nand storage device and data storage method thereof - Google Patents
Nand storage device and data storage method thereof Download PDFInfo
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- CN104252417A CN104252417A CN201310270348.8A CN201310270348A CN104252417A CN 104252417 A CN104252417 A CN 104252417A CN 201310270348 A CN201310270348 A CN 201310270348A CN 104252417 A CN104252417 A CN 104252417A
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Abstract
The invention discloses a Nand storage device and a data storage method thereof. The Nand storage device comprises an SLC (Single-Level Cell)-format subregion and an MLC (Multi Level Cell)-format subregion, wherein the MLC-format subregion is a residual region, except for the SLC-format sub subregion, in the Nand storage device. According to the method and device provided by the invention, one Nand storage device is divided into the SLC-format subregion and the MLC-format subregion, so that one Nand storage device can integrate the advantages of the SLC-format subregion and the MLC-format subregion.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of Nand storer and date storage method.Background technology
Along with the development of science and technology, electronic technology have also been obtained development at full speed, and the kind of electronic product also gets more and more, and people have also enjoyed the various facilities that development in science and technology brings.Present people can pass through various types of electronic equipment, enjoy the comfortable life along with development in science and technology brings.Such as, the electronic equipment such as smart mobile phone, panel computer, has become a part indispensable in people's life.
Internal memory is one of parts important in electronic equipment, and it is the bridge carrying out with CPU linking up.In electronic equipment, the operation of all programs is all carried out in internal memory, therefore the performance of internal memory is very large on the impact of electronic equipment, Nand-flash internal memory is the one of flash internal memory in the prior art, the non-linear macroelement pattern of its inner employing, the realization for solid-state large-capacity internal memory provides cheap effective solution.It is larger that Nand-flash storer has capacity, the advantages such as rewriting speed is fast, be applicable to the storage of mass data, thus in the industry cycle obtain and apply more and more widely, as embedded product comprises the USB flash disk etc. of digital camera, MP3 walkman memory card, compact.
Existing Nand-flash is divided into SLC (Single Level Cell-SLC, namely single-layer type stores) and MLC (Multi Level Cell-MLC, namely multiple field stores) both file layouts, and the difference of above-mentioned two kinds of file layouts comprises:
SLC technical characterstic is that the oxide film among floating gate and source electrode is thinner, when writing data by the electric charge making alive to floating gate, then through source electrode, stored electric charge can be eliminated, by such mode, just 1 message unit can be stored, this technology can provide programming and reading fast, but this Technology Restriction is in the problem of Silicon efficiency, by more advanced flow process reinforcement technique (Process enhancements), could must upwards promote SLC process technique.
The effect of MLC be by the information of Liang Ge unit stored in a Floating Gate (depositing the part of electric charge in flash memory cell), then utilize the electric charge of different potentials (Level), precisely read and write by the Control of Voltage of memory storage.MLC is by using a large amount of electric pressures, and each unit stores two bits, and packing density is larger.SLC framework is 0 and 1 two value, and MLC framework once can store the value of more than 4, and therefore, MLC framework can have reasonable storage density.
SLC framework is 0 and 1 two value, and MLC framework once can store the value of more than 4, therefore the storage density of MLC framework is higher, and can utilize the standby capacity improving product of old production journey, need not extra investment production equipment, have the advantage of cost and yield.Compared with SLC, MLC production cost is lower, and capacity is large.If through improving, the readwrite performance of MLC should promote further.Compare the shortcoming of MLC with SLC: MLC framework has many shortcomings, be first that serviceable life is shorter, SLC framework can write 100,000 times, and MLC framework can only bear the write of about 10,000 times.Next is exactly that access speed is slow, and under current technical conditions, MLC chip theoretical velocity can only reach about 6MB.Quicker than MLC framework more than three times of SLC framework.Moreover SLC is high for MLC observable index, under identical service condition more than SLC about 15% current drain.Although compared with SLC, MLC shortcoming is a lot, and in single chips capacity, current MLC still account for absolute advantage.Because MLC framework and cost all have absolute predominance, the even more jumbo market demand of 2GB, 4GB, 8GB can be met.
Present inventor, in the process realizing technical scheme in the embodiment of the present application, finds that prior art exists following technical matters:
For ensureing Large Copacity and low cost, all adopting the file layout of MLC at present, due to the storage characteristics of MLC, causing system start-up loading slow, not having SLC system quick.So Nand-flash internal memory of the prior art can not accomplish that processing speed and storage space are taken into account.
Summary of the invention
The invention provides a kind of Nand storer and date storage method, method and apparatus provided by the present invention solves prior art Nand-flash internal memory can not accomplish that processing speed and storage space are ined succession the problem taken into account.
The invention provides a kind of method forming Nand storer, the method comprises:
When creating the division to Nand storer, receive the partitioned parameters for carrying out subregion, and be written in the embedded memory chip of described Nand storer, wherein, described partitioned parameters comprises the single-layer type storage SLC/ multiple field storage MLC attribute of the start address of each subregion, the area size of each subregion and each subregion;
According to described partitioned parameters, described Nand storer is marked off subregion and the multiple field storage MLC form subregion that a single-layer type stores SLC form, wherein said MLC form subregion is the remaining area in described Nand storer except the subregion of described SLC form.
The present invention also provides a kind of Nand storer, and this Nand storage comprises:
A single-layer type stores subregion and a multiple field storage MLC form subregion of SLC form, and wherein, described MLC form subregion is the remaining area in described Nand storer except the subregion of described SLC form.
Apply the date storage method that above-mentioned Nand storer realizes, the method comprises:
When the installation request of the first application program being detected, obtain the first attribute information of this first application program and the partition information of described Nand storer;
Whether meet first pre-conditioned, obtain the first testing result if detecting described first application program according to described first attribute information;
If the first testing result is satisfied, then according to the partition information of described Nand storer, the installation file of described first application program is stored into described single-layer type and stores in the subregion of SLC form.
The scheme more optimized, if the first testing result is not for meet, is then stored into described multiple field according to the partition information of described Nand storer by the installation file of described first application program and stores in the subregion of MLC form.
Whether the scheme more optimized, detect described first application program according to described first attribute information and meet first pre-conditioned, obtain the first testing result and comprise:
Determine that described first application program is that system starts application program according to described first attribute information, then it is first pre-conditioned that the first testing result obtained is that described application program meets.
The scheme more optimized, described system starts application program and comprises BIOS system program, OS system program, kernel system program or android system program.
The scheme more optimized, the method comprises further:
When the installation request of the second application program being detected, obtain the second attribute information of this second application program and the partition information of described Nand storer;
Whether meet first pre-conditioned, obtain the second testing result if detecting described second application program according to described second attribute information;
If the second testing result is satisfied, then determine that described single-layer type stores the subregion remaining area of SLC form according to the partition information of described Nand storer;
Judge whether the subregion remaining area of described single-layer type storage SLC form is greater than the region shared by described second application program installation, if so, then according to the partition information of described Nand storer, the installation file of described second application program is stored into described single-layer type to store in the remaining area of the subregion of SLC form.
The present invention also provides a kind of electronic equipment, and be provided with above-mentioned Nand storer in this electronic equipment, this electronic equipment also comprises:
Information acquisition unit, for the installation request of the first application program being detected, obtains the first attribute information of this first application program and the partition information of described Nand storer;
First detecting unit, pre-conditioned for whether meeting first according to described first application program of described first attribute information detection, obtain the first testing result;
First control module, if the first testing result is satisfied, stores in the subregion of SLC form for the installation file of described first application program being stored into described single-layer type according to the partition information of described Nand storer.
The scheme more optimized, if the first testing result is not for meet, described first control module also stores in the subregion of MLC form for the installation file of described first application program being stored into described multiple field according to the partition information of described Nand storer.
The scheme more optimized, described first detecting unit is also for determining that according to described first attribute information described first application program is that system starts application program, then it is first pre-conditioned that the first testing result obtained is that described application program meets.
The scheme more optimized, this electronic equipment also comprises:
Second control module, when the installation request of the second application program being detected, for the partition information of the second attribute information and described Nand storer that obtain this second application program; Whether meet first pre-conditioned, obtain the second testing result if detecting described second application program according to described second attribute information; If the second testing result is satisfied, then determine that described single-layer type stores the subregion remaining area of SLC form according to the partition information of described Nand storer; Judge whether the subregion remaining area of described single-layer type storage SLC form is greater than the region shared by described second application program installation, if so, then according to the partition information of described Nand storer, the installation file of described second application program is stored into described single-layer type to store in the remaining area of the subregion of SLC form.
One or two in technique scheme, at least has following technique effect:
The method and apparatus that the embodiment of the present invention provides is in a Nand-flash internal memory (i.e. Nand storer), mark off subregion and the multiple field storage MLC form subregion that single-layer type stores SLC form, makes to take into account single-layer type in a Nand storer and stores the subregion of SLC form and the advantage of multiple field storage MLC form subregion.
Accompanying drawing explanation
Fig. 1 is a kind of process flow diagram forming the method for Nand storer of the embodiment of the present invention ();
Fig. 2 is the process flow diagram of the embodiment of the present invention (three) a kind of date storage method;
Fig. 3 is the structural representation of a kind of electronic equipment of the embodiment of the present invention.
Embodiment
Embodiment one, the invention provides a kind of to reconfigure on an existing eMMC chip to overcome the problems referred to above, to make in a Nand-flash internal memory not only to comprise single-layer type and store the subregion of SLC form but also comprise multiple field and store MLC form subregion.Concrete methods of realizing can be:
When creating the division to Nand storer, receive the partitioned parameters for carrying out subregion, and be written in the embedded memory chip of described Nand storer, wherein, described partitioned parameters comprises the single-layer type storage SLC/ multiple field storage MLC attribute of the start address of each subregion, the area size of each subregion and each subregion;
According to described partitioned parameters, described Nand storer is marked off subregion and the multiple field storage MLC form subregion that a single-layer type stores SLC form, wherein said MLC form subregion is the remaining area in described Nand storer except the subregion of described SLC form.
Embodiment two, also provide a kind of Nand storer based on said method the present invention, this Nand storage comprises:
A single-layer type stores subregion and a multiple field storage MLC form subregion of SLC form, and wherein, described MLC form subregion is the remaining area in described Nand storer except the subregion of described SLC form.
The scheme that the embodiment of the present invention provides is in a Nand-flash internal memory (i.e. Nand storer), mark off subregion and the multiple field storage MLC form subregion that single-layer type stores SLC form, makes to take into account single-layer type in a Nand storer and stores the subregion of SLC form and the advantage of multiple field storage MLC form subregion.
Below in conjunction with accompanying drawing, the main of the embodiment of the present application technical scheme is realized principle, embodiment and be explained in detail the beneficial effect that should be able to reach.
Embodiment one, as shown in Figure 1, the embodiment of the present invention provides a kind of method forming Nand storer, is described in detail to the specific embodiment of the present invention below in conjunction with Figure of description:
Step 101, when creating the division to Nand storer, receive the partitioned parameters for carrying out subregion, and be written in the embedded memory chip of described Nand storer, wherein, described partitioned parameters comprises the single-layer type storage SLC/ multiple field storage MLC attribute of the start address of each subregion, the area size of each subregion and each subregion;
This step can be in concrete realization, in order to make the storage space of storer maximum, and can take into account the advantage of SLC again, and can arrange a SLC subregion in NAND, then other regions then remain MLC form.So in the concrete realization of step 101 can be:
Arrange an Enhanced user area when create partition, transmit start address, size, SLC/MLC attribute is (because only arrange a SLC so this place can be just the correlation parameter of SLC; Such as, described start address is then the start address of SLC form subregion), be written to eMMCExtended CSD register; Thus in described Nand storer, mark off a special SLC subregion: concrete realization order can be:
-ENH_START_ADDR?for?the?start?address
-ENH_SIZE_MULT?for?the?size
-PARTITIONS_ATTRIBUTE?for?the?Enhanced?attribute
Step 102, according to described partitioned parameters, described Nand storer is marked off subregion and the multiple field storage MLC form subregion that a single-layer type stores SLC form, wherein said MLC form subregion is the remaining area in described Nand storer except the subregion of described SLC form.
Then can form a kind of Nand storer after utilizing said method, this Nand storage comprises:
A single-layer type stores subregion and a multiple field storage MLC form subregion of SLC form, and wherein, described MLC form subregion is the remaining area in described Nand storer except the subregion of described SLC form.
Based on the fireballing characteristic of SLC form multidomain treat-ment, generally system file can be stored in the subregion of SLC form in embody rule, so the size of the subregion of described SLC form can be when embody rule: such as Win8 system can divide 512MB, android system 256MB or less.
The method implement three, being provided by this embodiment forms a kind of new Nand storer, this Nand storer other regions except comprising a special SLC form subregion are all the subregions of MLC form, so when concrete storage data, can store respectively different files according to the concrete advantage of two kinds of form subregions.Thus the benefit that SLC and MLC two kinds of form subregion advantages taken into account by a Nand storer can be reached.The Nand storer embodiment of the present invention provided in order to the use embodiment of the present invention more optimized also provides a kind of date storage method realized based on described Nand storer, and the method comprises (as shown in Figure 2):
Step 201, when the installation request of the first application program being detected, obtains the first attribute information of this first application program and the partition information of described Nand storer;
Whether step 202, detect described first application program according to described first attribute information and meet first pre-conditioned, obtain the first testing result;
In embodiments of the present invention, detect described first application program whether to meet the first pre-conditioned specific implementation and can be:
Pre-set the white list of an application program, if certain application program is recorded in white list, then determine that this application program is satisfied first pre-conditioned application program.
When arranging white list, the characteristic based on SLC is that little, the fireballing characteristic of capacity carries out corresponding setting, and wherein, the file being specified application based on the featured configuration that SLC capacity is little just can be stored in SLC; First the characteristic opened for SLC speed considers that when determining specified file processing speed requires high application program, because the fireballing characteristic of SLC can meet processing speed require high application program.
Such as: the processing speed of system program file directly has influence on the processing speed of whole electronics, so in embodiments of the present invention, if determine that described first application program is that system starts application program according to described first attribute information, then it is first pre-conditioned that the first testing result obtained is that described application program meets.
Wherein, described system startup application program comprises BIOS system program, OS system program, kernel system program or android system program.
Step 203, if the first testing result is satisfied, is then stored into described single-layer type according to the partition information of described Nand storer by the installation file of described first application program and stores in the subregion of SLC form.
In addition, if the first testing result is not for meet, then according to the partition information of described Nand storer, the installation file of described first application program is stored into described multiple field and stores in the subregion of MLC form.
Further, except system file requires except height processing speed in electronic equipment, also have some application programs also higher to the requirement of processing speed in addition, but in order to the storage size of taking into account storer and processing speed.So in the method that provides of the embodiment of the present invention, if when having stored system file in the subregion of SLC form, also can comprise further:
When the installation request of the second application program being detected, obtain the second attribute information of this second application program and the partition information of described Nand storer;
Whether meet first pre-conditioned, obtain the second testing result if detecting described second application program according to described second attribute information;
If the second testing result is satisfied, then determine that described single-layer type stores the subregion remaining area of SLC form according to the partition information of described Nand storer;
Judge whether the subregion remaining area of described single-layer type storage SLC form is greater than the region shared by described second application program installation, if so, then according to the partition information of described Nand storer, the installation file of described second application program is stored into described single-layer type to store in the remaining area of the subregion of SLC form.
Described second application program can be any one application program, if the second application program is recorded in described white list, and the subregion of SLC form also has enough regions can store the file content of the second application program after storage system file, then file corresponding for described second application program can be stored in the subregion of described SLC form.
The date storage method that the embodiment of the present invention is carried is based on a kind of new nand memory, this Nand storer comprises subregion and the multiple field storage MLC form subregion that a single-layer type stores SLC form, different application files can be stored in no subregion based on the advantage of different-format subregion by the memory construction based on this new Nand, thus makes to be reduced to minimum on the impact of storage size while achieving the processing speed improving data.
In addition, in embodiments of the present invention system file is stored in the subregion of SLC form, the processing speed of system file is accelerated.
Embodiment four, as shown in Figure 3, the embodiment of the present invention provides a kind of electronic equipment, and be provided with the Nand storer described in embodiment two in this electronic equipment, this electronic equipment also comprises:
Information acquisition unit 301, for the installation request of the first application program being detected, obtains the first attribute information of this first application program and the partition information of described Nand storer;
First detecting unit 302, pre-conditioned for whether meeting first according to described first application program of described first attribute information detection, obtain the first testing result;
First detecting unit 302 described in this is also for determining that according to described first attribute information described first application program is that system starts application program, then it is first pre-conditioned that the first testing result obtained is that described application program meets.
First control module 303, if the first testing result is satisfied, stores in the subregion of SLC form for the installation file of described first application program being stored into described single-layer type according to the partition information of described Nand storer.
If the first testing result is not for meet, described first control module 303 also stores in the subregion of MLC form for the installation file of described first application program being stored into described multiple field according to the partition information of described Nand storer.
Further, except system file requires except height processing speed in electronic equipment, also have some application programs also higher to the requirement of processing speed in addition, but in order to the storage size of taking into account storer and processing speed.So in the electronic equipment that provides of the embodiment of the present invention, if when having stored system file in the subregion of SLC form, also can comprise further:
Second control module 304, when the installation request of the second application program being detected, for the partition information of the second attribute information and described Nand storer that obtain this second application program; Whether meet first pre-conditioned, obtain the second testing result if detecting described second application program according to described second attribute information; If the second testing result is satisfied, then determine that described single-layer type stores the subregion remaining area of SLC form according to the partition information of described Nand storer; Judge whether the subregion remaining area of described single-layer type storage SLC form is greater than the region shared by described second application program installation, if so, then according to the partition information of described Nand storer, the installation file of described second application program is stored into described single-layer type to store in the remaining area of the subregion of SLC form.
Above-mentioned one or more technical scheme in the embodiment of the present application, at least has following technique effect:
The scheme that the embodiment of the present invention one provides is in a Nand-flash internal memory (i.e. Nand storer), mark off subregion and the multiple field storage MLC form subregion that single-layer type stores SLC form, makes to take into account single-layer type in a Nand storer and stores the subregion of SLC form and the advantage of multiple field storage MLC form subregion.
The date storage method that the embodiment of the present invention is carried is based on a kind of new nand memory, this Nand storer comprises subregion and the multiple field storage MLC form subregion that a single-layer type stores SLC form, different application files can be stored in no subregion based on the advantage of different-format subregion by the memory construction based on this new Nand, thus makes to be reduced to minimum on the impact of storage size while achieving the processing speed improving data.
In addition, in embodiments of the present invention system file is stored in the subregion of SLC form, the processing speed of system file is accelerated.
Method of the present invention is not limited to the embodiment described in embodiment, and those skilled in the art's technical scheme according to the present invention draws and other embodiment belongs to technological innovation scope of the present invention equally.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Nand-flash of the prior art is divided into SLC (Single Level Cell-SLC, namely single-layer type stores) and MLC (Multi Level Cell-MLC, namely multiple field stores) both file layouts, above-mentioned two kinds of file layouts have shortcoming and advantage separately.The advantage that wherein MLC is maximum is that MLC framework can have reasonable storage density, but is that serviceable life is shorter, access speed is slow relative to shortcoming SLC.Based on the above-mentioned situation of SLC and MLC so Nand-flash internal memory of the prior art can not accomplish that processing speed and storage space are taken into account.
Claims (11)
1. form a method for Nand storer, it is characterized in that, the method comprises:
When creating the division to Nand storer, receive the partitioned parameters for carrying out subregion, and be written in the embedded memory chip of described Nand storer, wherein, described partitioned parameters comprises the single-layer type storage SLC/ multiple field storage MLC attribute of the start address of each subregion, the area size of each subregion and each subregion;
According to described partitioned parameters, described Nand storer is marked off subregion and the multiple field storage MLC form subregion that a single-layer type stores SLC form, wherein said MLC form subregion is the remaining area in described Nand storer except the subregion of described SLC form.
2. a Nand storer, is characterized in that, this Nand storage comprises:
A single-layer type stores subregion and a multiple field storage MLC form subregion of SLC form, and wherein, described MLC form subregion is the remaining area in described Nand storer except the subregion of described SLC form.
3. application rights requires the date storage method that the Nand storer described in 2 realizes, and it is characterized in that, the method comprises:
When the installation request of the first application program being detected, obtain the first attribute information of this first application program and the partition information of described Nand storer;
Whether meet first pre-conditioned, obtain the first testing result if detecting described first application program according to described first attribute information;
If the first testing result is satisfied, then according to the partition information of described Nand storer, the installation file of described first application program is stored into described single-layer type and stores in the subregion of SLC form.
4. method as claimed in claim 3, is characterized in that, if the first testing result is not for meet, then according to the partition information of described Nand storer, the installation file of described first application program is stored into described multiple field and stores in the subregion of MLC form.
5. whether method as claimed in claim 3, is characterized in that, detect described first application program and meet first pre-conditioned, obtain the first testing result and comprise according to described first attribute information:
Determine that described first application program is that system starts application program according to described first attribute information, then it is first pre-conditioned that the first testing result obtained is that described application program meets.
6. method as claimed in claim 5, is characterized in that, described system starts application program and comprises BIOS system program, OS system program, kernel system program or android system program.
7. the method as described in as arbitrary in claim 3-6, it is characterized in that, the method comprises further:
When the installation request of the second application program being detected, obtain the second attribute information of this second application program and the partition information of described Nand storer;
Whether meet first pre-conditioned, obtain the second testing result if detecting described second application program according to described second attribute information;
If the second testing result is satisfied, then determine that described single-layer type stores the subregion remaining area of SLC form according to the partition information of described Nand storer;
Judge whether the subregion remaining area of described single-layer type storage SLC form is greater than the region shared by described second application program installation, if so, then according to the partition information of described Nand storer, the installation file of described second application program is stored into described single-layer type to store in the remaining area of the subregion of SLC form.
8. an electronic equipment, is characterized in that, be provided with Nand storer as claimed in claim 2 in this electronic equipment, this electronic equipment also comprises:
Information acquisition unit, for the installation request of the first application program being detected, obtains the first attribute information of this first application program and the partition information of described Nand storer;
First detecting unit, pre-conditioned for whether meeting first according to described first application program of described first attribute information detection, obtain the first testing result;
First control module, if the first testing result is satisfied, stores in the subregion of SLC form for the installation file of described first application program being stored into described single-layer type according to the partition information of described Nand storer.
9. electronic equipment as claimed in claim 8, it is characterized in that, if the first testing result is not for meet, described first control module also stores in the subregion of MLC form for the installation file of described first application program being stored into described multiple field according to the partition information of described Nand storer.
10. electronic equipment as claimed in claim 8, it is characterized in that, described first detecting unit is also for determining that according to described first attribute information described first application program is that system starts application program, then it is first pre-conditioned that the first testing result obtained is that described application program meets.
11. as arbitrary in claim 8-10 as described in electronic equipment, it is characterized in that, this electronic equipment also comprises:
Second control module, when the installation request of the second application program being detected, for the partition information of the second attribute information and described Nand storer that obtain this second application program; Whether meet first pre-conditioned, obtain the second testing result if detecting described second application program according to described second attribute information; If the second testing result is satisfied, then determine that described single-layer type stores the subregion remaining area of SLC form according to the partition information of described Nand storer; Judge whether the subregion remaining area of described single-layer type storage SLC form is greater than the region shared by described second application program installation, if so, then according to the partition information of described Nand storer, the installation file of described second application program is stored into described single-layer type to store in the remaining area of the subregion of SLC form.
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| CN106843762B (en) * | 2017-01-17 | 2019-11-12 | 深圳忆联信息系统有限公司 | The method and solid state hard disk of managing storage area |
| CN107832637A (en) * | 2017-11-20 | 2018-03-23 | 丹东瑞银科技有限公司 | EMMC and EMMC subregion Write-protection method |
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