CN101894076A - Implementation method and system for improving writing speed of storage equipment - Google Patents
Implementation method and system for improving writing speed of storage equipment Download PDFInfo
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Abstract
The invention is applicable to the technical field of storage, and provides an implementation method and an implementation system for improving the writing speed of storage equipment. The method comprises the following steps of: calculating a storage space occupied by a first file distribution table according to the sizes of storage spaces occupied by a preset concealed area and a preset reserved area; calculating a storage space occupied by a second file distribution table according to the sizes of the storage spaces occupied by the concealed area, the reserved area and the first file distribution table; calculating capacity range data of the storage equipment according to the size of the storage space occupied by the second file distribution table, and recording the capacity range data into a firmware of the storage equipment; controlling formatting of the storage equipment; and calculating the storage space occupied by the reserved area after the formatting according to the sizes of the storage spaces occupied by the reserved area and the second file distribution table before the formatting. The method provided by the invention writes the data at the start position of a middle page of the storage equipment so as to improve the speed of the data writing storage equipment.
Description
Technical field
The invention belongs to technical field of memory, relate in particular to a kind of implementation method and system that improves writing speed of storage equipment.
Background technology
Memory device (flash memory) is used more and more general in daily life, the writing speed of flash memory device becomes the important indicator of weighing the flash memory device performance, the writing speed that improves flash memory device will improve data-handling efficiency greatly, help the application of increased flash memory memory device.
The physics of flash memory constitutes: comprise one or more crystal grain in each case chip; Comprise a plurality of in each crystal grain; Comprise a plurality of pages or leaves in each piece; Generally be divided into one or more sectors in each page or leaf by the user.Physically, flash memory is unit management with the page or leaf, then is to be unit management with the sector in logic, and a page or leaf is one group with one or more sectors, and grouping is left in the flash media.
Existing file management system (for example FAT file system) to the process that memory device writes data is: write hidden areas such as directory area, FAT district earlier, again the write data district.And flash memory device to be least unit with the page or leaf manage, the data that write often are not the page or leaf beginnings from flash memory device, but begin to write from certain page middle part, end in the middle of certain page again.Because the characteristic of flash memory, certain page of write data is begun to write if not the beginning from this page, will move RAM to the legacy data of this page preservation, the new data that will write is write RAM, then legacy data and new data are write into this page or leaf together, process is consuming time and be not easy to management, also produces a large amount of fragments in page or leaf, needs many time of waste to reclaim fragment.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of implementation method that writing speed of storage equipment is provided, it is consuming time to be intended to solve in the prior art process that writes data to memory device, and in page or leaf, produce a large amount of fragments easily, need many time of waste to reclaim the problem of fragment.
The embodiment of the invention is achieved in that a kind of implementation method that improves writing speed of storage equipment, and described method comprises the steps:
According to the size of the shared storage space in the hidden area that sets in advance, reserved area, calculate the shared storage space of first file allocation table;
According to the size of the shared storage space of hidden area, reserved area and first file allocation table, calculate the shared storage space of second file allocation table;
According to the size of the shared storage space of described second file allocation table, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device;
Control is formatd processing to memory device;
According to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
Another purpose of the embodiment of the invention is to provide a kind of realization system that improves writing speed of storage equipment, and described system comprises:
The first file allocation table computing module is used for the size according to the shared storage space in the hidden area, the reserved area that set in advance, calculates the shared storage space of first file allocation table;
The second file allocation table computing module is used for the size according to the shared storage space of hidden area, reserved area and first file allocation table, calculates the shared storage space of second file allocation table;
The range of capacity computing module, the size that is used for the shared storage space of second file allocation table that calculates according to the described second file allocation table computing module, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device;
The format processing and control module is used for control memory device is formatd processing; And
The reserved area computing module, be used for according to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
In embodiments of the present invention, according to the size of the shared storage space in the hidden area that sets in advance, reserved area, calculate the shared storage space of first file allocation table; According to the size of the shared storage space of hidden area, reserved area and first file allocation table, calculate the shared storage space of second file allocation table; According to the size of the shared storage space of described second file allocation table, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device; Control is formatd processing to memory device; According to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, the writing position of data field that makes described memory device is in the starting position of new page, improve the speed of data write storage devices, also can not produce a large amount of fragments simultaneously.
Description of drawings
Fig. 1 is the file system data organizational form synoptic diagram that the embodiment of the invention provides;
Fig. 2 is the realization flow figure of the implementation method of the raising writing speed of storage equipment that provides of the embodiment of the invention;
Fig. 3 is the structured flowchart of the realization system of the raising writing speed of storage equipment that provides of fifth embodiment of the invention;
Fig. 4 is the structured flowchart of the realization system of the raising writing speed of storage equipment that provides of sixth embodiment of the invention;
Fig. 5 is the structured flowchart of the realization system of the raising writing speed of storage equipment that provides of ninth embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In embodiments of the present invention,, make the data field be positioned at the starting position of page or leaf, improve the speed of data write storage device by reducing the available sector sum of memory device.
The purpose of the embodiment of the invention is to provide a kind of implementation method that improves writing speed of storage equipment, and described method comprises the steps:
According to the size of the shared storage space in the hidden area that sets in advance, reserved area, calculate the shared storage space of first file allocation table;
According to the size of the shared storage space of hidden area, reserved area and first file allocation table, calculate the shared storage space of second file allocation table;
According to the size of the shared storage space of described second file allocation table, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device;
Control is formatd processing to memory device;
According to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
Another purpose of the embodiment of the invention is to provide a kind of realization system that improves writing speed of storage equipment, and described system comprises:
The first file allocation table computing module is used for the size according to the shared storage space in the hidden area, the reserved area that set in advance, calculates the shared storage space of first file allocation table;
The second file allocation table computing module is used for calculating the shared storage space of second file allocation table according to the size that starts the shared storage space of sector, second reserve sector and first file allocation table;
The range of capacity computing module is used for second file allocation table that calculates according to the described second file allocation table computing module, calculates the range of capacity data of memory device;
The format processing and control module is used for control memory device is formatd processing; And
The reserved area computing module, be used for according to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
In embodiments of the present invention, according to the size of the shared storage space in the hidden area that sets in advance, reserved area, calculate the shared storage space of first file allocation table; According to the size of the shared storage space of hidden area, reserved area and first file allocation table, calculate the shared storage space of second file allocation table; According to described second file allocation table, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device; Control is formatd processing to memory device; According to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
The FAT file system is by Windows, Linux and most of mobile device, the widely used a kind of file system of handheld device operating system.The FAT file system is made up of master boot sector and some FAT subregions usually, and existing flash memory device generally has only a FAT subregion, and may not comprise master boot sector.Described FAT subregion is formed by starting sector, file allocation table, directory area and data field.
The present invention is an example with the FAT file system, come concrete description the present invention, Fig. 1 shows the FAT file system data organizational form synoptic diagram that the embodiment of the invention provides, it comprises master boot sector, first reserve sector, starts sector, second reserve sector, two file allocation table (illustrating with FAT among the figure), root directory area and data field.In the embodiment of the invention, the master boot sector and first reserve sector are called the hidden area, will start the sector and second reserve sector is called the reserved area.
Wherein master boot sector is responsible for guiding and is started function etc., leaves 0 address of flash memory device in.Also comprise first reserve sector after the master boot sector, be used to adjust the position that starts the sector.If file system does not comprise master boot sector, then there is not first reserve sector accordingly yet.
Starting the sector is positioned at after the described master boot sector, it is first sector of described FAT subregion, it is logic sector 0, comprise BPB (BIOS parameter block), the BPB essential record physical parameter of some subregions, comprise every sector byte number, every bunch of sector number, total sector number, per minute district sector number and reserve sector number etc.
Also comprise second reserve sector after the described startup sector, be used for backup and start the sector, adjust the skew of data field.
File allocation table (FAT) is deposited after the described startup sector and second reserve sector, described file allocation table record the membership credentials of file in file system, particularly important, so two file allocation table are arranged, be FAT1 and the FAT2 among Fig. 1, but its content is in full accord.This has shown each the list item co-registered chained list index structure of storage elementary cell bunch, i.e. each bunch of the starting cluster of each file and successive links thereof number; And show which is an available sky bunch.
Described bunch is the minimum memory unit of file data in the FAT subregion.File also will take one bunch space as if one bunch of curtailment; If more than one bunch of length,, file data stored in the data field a plurality of bunches space then by by chained list guided bunch number.
Root directory area (FDT) has write down the content of file system root directory, comprises the substance such as title, size, reference position, creation-time of each file and file.Each file in the file system is all on the books in catalogue listing.In the FAT32 file system, described root directory area accounts for 0 byte.
The data field is used for depositing sub-directory and data, account for the flash memory device storage space more than 90% in addition more.The FAT file system is with the data separation cluster management, and file is formed by a plurality of bunches, and one bunch is a plurality of sectors, and each bunch be label respectively, by bunch number just can directly finding the deposit data address.
Above-mentioned respectively distinguish shared storage space might be different, wherein the table size of Bao Cuning is also possible different, but all there is fixing structure in each district, wherein the form of Bao Cuning is all followed the FAT file system rule.
Embodiment one:
Fig. 2 shows the realization flow of the implementation method of the raising writing speed of storage equipment that the embodiment of the invention provides, and its concrete step is as described below:
In step S201,, calculate the shared storage space of first file allocation table according to the size of the shared storage space in the hidden area that sets in advance, reserved area.
In embodiments of the present invention, above-mentioned hidden area is meant the master boot sector and first reserve sector, and the reserved area is meant and starts the sector and second reserve sector.
In step S202,, calculate the shared storage space of second file allocation table according to the size of the shared storage space of hidden area, reserved area and first file allocation table.
In step S203, according to the size of the shared storage space of described second file allocation table, calculate the range of capacity data of memory device, and described range of capacity data are kept in the firmware of described memory device.
In embodiments of the present invention, the shared storage space of storage space-second file allocation table that the full capacity-hidden area of the range of capacity data=memory device of memory device and reserved area are shared, wherein, these range of capacity data will be uploaded to windows operating system before format, so that behind the operating system control format memory device, still preserve the data of the shared storage space of the range of capacity data of memory device and second file allocation table.
In step S204, control is formatd processing to memory device.
In step S205, according to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
In the embodiment of the invention, the shared storage space of described first file allocation table is the size of the file allocation table of the calculating first time; The shared storage space of described second file allocation table is the size of the file allocation table of the calculating second time.
In embodiments of the present invention,, make the writing position of data field be in the starting position of page or leaf, guarantee the writing speed of data by reducing the memory capacity of memory device.
Embodiment two:
As one embodiment of the present of invention, the step S201 in carrying out the foregoing description one also needs before calculating the step of the shared storage space of first file allocation table:
The shared storage space in described in advance hidden area is set to the integral multiple of the contained sector number of each page in the memory device; The reserved area is set at least 32 sectors; Wherein, described hidden area comprises the boot section and first reserve sector, and described reserved area comprises the startup sector and second reserve sector.
The shared storage space in described in advance hidden area is set to the integral multiple of the contained sector number of each page in the memory device, and this integral multiple comprises 0 times.
Embodiment three:
As one embodiment of the present of invention, the step of calculating the shared storage space of first file allocation table adopts following computing formula:
The shared sector number of first file allocation table=[(total available sector number-hidden area takies sector number-reserved area and takies sector number)/every bunch of sector number] * (every bunch takies byte number/every sector byte number).
Embodiment four:
In embodiments of the present invention, the step of calculating the shared storage space of second file allocation table adopts following computing formula:
The shared sector number of second file allocation table=[(total available sector number-hidden area take sector number-reserved area take sector number-first file allocation table take sector number)/every bunch of sector number] * (every bunch takies byte number/every sector byte number).
Wherein, the size of the shared storage space of above-mentioned second file allocation table satisfies following condition:
1, the size of the shared storage space of second file allocation table is the integral multiple of sector.
2, the size of the shared storage space of second file allocation table is less than or equal to the size of the shared storage space of first file allocation table.
3, adjust the reserved area, make (size of the storage space that reserved area+second file allocation table is shared) get remainder divided by the contained sector number of each page, described remainder is greater than (each page contained sector number-8) and less than the contained sector number of each page.
In embodiments of the present invention, for example each page or leaf comprises 16 sectors, formaing preceding reserved area is that 33 sectors (wherein start the sector and account for 1 sector, second reserve sector accounts for 32 sectors), second file allocation table accounts for 200 sectors (wherein, FAT1 accounts for 100 sectors, FAT2 accounts for 100 sectors), (1+32+100+100) getting remainder to 8 is 1, adds can be divided exactly by 8 after 7 sectors, start the sector and be fixed as 1 sector, therefore the size that can adjust second reserve sector is 32+7, promptly 39, that is to say, the reserved area is adjusted into 40, can guarantees that the starting position, data field is positioned at the starting position of page or leaf.
In the above-described embodiments, the size that described method can also comprise bunch is set to this step of size of a page or leaf or a plurality of pages, in the time of can guaranteeing to write data like this, all is positioned at the starting position of page or leaf at every turn.
Embodiment five:
Fig. 3 shows the realization system of the raising writing speed of storage equipment that the embodiment of the invention provides, and for convenience of explanation, has only provided the part relevant with the embodiment of the invention among the figure.
The first file allocation table computing module 11 calculates the shared storage space of first file allocation table according to the size of the shared storage space in the hidden area, the reserved area that set in advance; The second file allocation table computing module 12 calculates the shared storage space of second file allocation table according to the size of the shared storage space of hidden area, reserved area and first file allocation table; The size of the storage space that second file allocation table that range of capacity computing module 13 calculates according to the described second file allocation table computing module 12 is shared, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device; 14 controls of format processing and control module are formatd processing to memory device; Reserved area computing module 15 is according to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
In embodiments of the present invention, the functional description of above-mentioned each module as described in above-mentioned method embodiment, does not repeat them here.
Embodiment six:
As one embodiment of the present of invention, first is provided with the integral multiple that the shared storage space in the described in advance hidden area of module 16 is set to the contained sector number of each page in the memory device; Second is provided with module 17 reserved areas is set at least 32 sectors; Wherein, described hidden area comprises the boot section and first reserve sector, and described reserved area comprises the startup sector and second reserve sector.As shown in Figure 4.
Embodiment seven:
In embodiments of the present invention, the described first file allocation table computing module calculates the step that the shared storage space of first file allocation table and the described second file allocation table computing module calculate the shared storage space of second file allocation table and adopts following computing formula:
The shared sector number of first file allocation table=[(total available sector number-hidden area takies sector number-reserved area and takies sector number)/every bunch of sector number] * (every bunch takies byte number/every sector byte number);
The shared sector number of second file allocation table=[(total available sector number-hidden area take sector number-reserved area take sector number-first file allocation table take sector number)/every bunch of sector number] * (every bunch takies byte number/every sector byte number).
Embodiment eight:
The size of the storage space that described second file allocation table is shared satisfies following condition:
The size of the storage space that second file allocation table is shared is the integral multiple of sector;
The size of the storage space that second file allocation table is shared is less than or equal to the size of the shared storage space of first file allocation table;
Adjust the reserved area, make (reserved area+shared sector number of second file allocation table) get remainder divided by the contained sector number of each page, described remainder is greater than (each page contained sector number-8) and less than the contained sector number of each page.
Embodiment nine:
As one embodiment of the present of invention, as shown in Figure 5, the first file allocation table computing module 11 calculate the shared storage space of first file allocation table and the described second file allocation table computing module 12 calculate the shared storage space of second file allocation table step before, the size that bunch size is provided with 18 described bunches of modules is set to one or more pages size.
Above-mentioned is specific embodiments of the invention only, do not repeat them here, but not in order to restriction the present invention.
In embodiments of the present invention, according to the size of the shared storage space in the hidden area that sets in advance, reserved area, calculate the shared storage space of first file allocation table; According to the size of the shared storage space of hidden area, reserved area and first file allocation table, calculate the shared storage space of second file allocation table; According to the size of the shared storage space of described second file allocation table, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device; Control is formatd processing to memory device; According to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the format is used to adjust the range of capacity data of memory device, the writing position of data field that makes described memory device is in the starting position of new page, improve the speed of data write storage devices, also can not produce a large amount of fragments simultaneously.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an implementation method that improves writing speed of storage equipment is characterized in that, described method comprises the steps:
According to the size of the shared storage space in the hidden area that sets in advance, reserved area, calculate the shared storage space of first file allocation table;
According to the size of the shared storage space of hidden area, reserved area and first file allocation table, calculate the shared storage space of second file allocation table;
According to the size of the shared storage space of described second file allocation table, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device;
Control is formatd processing to memory device;
According to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
2. the method for claim 1 is characterized in that, the size of the storage space that the hidden area that described basis sets in advance, reserved area are shared also comprises the steps: before calculating the step of the shared storage space of first file allocation table
The shared storage space in described in advance hidden area is set to the integral multiple of the contained sector number of each page in the memory device;
The reserved area is set at least 32 sectors;
Wherein, described hidden area comprises the boot section and first reserve sector, and described reserved area comprises the startup sector and second reserve sector.
3. method as claimed in claim 2 is characterized in that, the size of the storage space that described second file allocation table is shared satisfies following condition:
The size of the storage space that second file allocation table is shared is the integral multiple of sector;
The size of the storage space that second file allocation table is shared is less than or equal to the size of the shared storage space of first file allocation table;
Adjust the reserved area, make (reserved area+shared sector number of second file allocation table) get remainder divided by the contained sector number of each page, described remainder is greater than (each page contained sector number-8) and less than the contained sector number of each page.
4. the method for claim 1 is characterized in that, the step of the storage space that described calculating first file allocation table and second file allocation table are shared adopts following computing formula:
The shared sector number of first file allocation table=[(total available sector number-hidden area takies sector number-reserved area and takies sector number)/every bunch of sector number] * (every bunch takies byte number/every sector byte number);
The shared sector number of second file allocation table=[(total available sector number-hidden area take sector number-reserved area take sector number-first file allocation table take sector number)/every bunch of sector number] * (every bunch takies byte number/every sector byte number).
5. method as claimed in claim 4 is characterized in that, described method is further comprising the steps of:
Described bunch size is set to one or more pages size.
6. realization system that improves writing speed of storage equipment is characterized in that described system comprises:
The first file allocation table computing module is used for the size according to the shared storage space in the hidden area, the reserved area that set in advance, calculates the shared storage space of first file allocation table;
The second file allocation table computing module is used for the size according to the shared storage space of hidden area, reserved area and first file allocation table, calculates the shared storage space of second file allocation table;
The range of capacity computing module, the size that is used for the shared storage space of second file allocation table that calculates according to the described second file allocation table computing module, calculate the range of capacity data of memory device, and described range of capacity data are recorded in the firmware of described memory device;
The format processing and control module is used for control memory device is formatd processing; And
The reserved area computing module, be used for according to the size that formats the shared storage space of the preceding reserved area and second file allocation table, the storage space that reserved area after the computation schemeization is shared, reserved area after the described format is used to adjust the range of capacity data of memory device, and the writing position of data field that makes described memory device is in the starting position of new page.
7. system as claimed in claim 6 is characterized in that, described system also comprises:
First is provided with module, is used for the integral multiple that the shared storage space in described in advance hidden area is set to the sector number that each page of memory device comprised; And
Second is provided with module, is used for the reserved area and is set at least 32 sectors;
Wherein, described hidden area comprises the boot section and first reserve sector, and described reserved area comprises the startup sector and second reserve sector.
8. system as claimed in claim 7 is characterized in that, the size of the storage space that described second file allocation table is shared satisfies following condition:
The size of the storage space that second file allocation table is shared is the integral multiple of sector;
The size of the storage space that second file allocation table is shared is less than or equal to the size of the shared storage space of first file allocation table;
Adjust the reserved area, make (reserved area+shared sector number of second file allocation table) get remainder divided by the contained sector number of each page, described remainder is greater than (each page contained sector number-8) and less than the contained sector number of each page.
9. system as claimed in claim 6, it is characterized in that the described first file allocation table computing module calculates the step that the shared storage space of first file allocation table and the described second file allocation table computing module calculate the shared storage space of second file allocation table and adopts following computing formula:
The shared sector number of first file allocation table=[(total available sector number-hidden area takies sector number-reserved area and takies sector number)/every bunch of sector number] * (every bunch takies byte number/every sector byte number);
The shared sector number of second file allocation table=[(total available sector number-hidden area take sector number-reserved area take sector number-first file allocation table take sector number)/every bunch of sector number] * (every bunch takies byte number/every sector byte number).
10. system as claimed in claim 6 is characterized in that, described system also comprises:
Bunch size is provided with module, and the size that is used for described bunch is set to one or more pages size.
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| CN103116640A (en) * | 2013-02-21 | 2013-05-22 | 珠海全志科技股份有限公司 | Method and device for formatting FAT (file allocation table) file system |
| CN103116640B (en) * | 2013-02-21 | 2015-12-23 | 珠海全志科技股份有限公司 | FAT file system format method and device |
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| CN101894076B (en) | 2012-08-29 |
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