CN101751340A - Data write method for improving service life of data storage equipment - Google Patents
Data write method for improving service life of data storage equipment Download PDFInfo
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- CN101751340A CN101751340A CN 200810179294 CN200810179294A CN101751340A CN 101751340 A CN101751340 A CN 101751340A CN 200810179294 CN200810179294 CN 200810179294 CN 200810179294 A CN200810179294 A CN 200810179294A CN 101751340 A CN101751340 A CN 101751340A
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Abstract
The invention discloses a data write method for improving the service life of data storage equipment, which includes the following steps: setting information units corresponding to the data blocks in the storage equipment on a nonvolatile memory; circularly searching the data blocks used for writing data in sequence on the information units of the nonvolatile memory; and according to the sequence of the information units, writing the record data to the corresponding data blocks in sequence, setting attributes in all the information units, which indicate that whether the corresponding data blocks are empty and whether the data blocks have invalid record data or have valid record data, judging the attributes of the information units corresponding to the data blocks to which the record data is to be written, and if the attributes indicate that the corresponding data blocks have valid data, sending out alarm information to the user. The nonvolatile memory is an Fram or EPROM and the storage equipment is an SD card or CF card. Through the method, the record data are sequentially stored in the data blocks and the data blocks evenly store the record data, thus avoiding the problem of service life reduction of the storage equipment caused by frequency data read and write operations.
Description
Technical field
The present invention relates to field of computer technology, be meant a kind of method for writing data that prolongs the data storage device life-span especially.
Background technology
In safety-protection system, the general greatest problem that faces based on the video recording system of memory device is exactly the life-span of memory device.Because the number of times of writing of some memory device all is conditional, for example: the SD card is based on the FLASH structure, and it writes number of times is conditional, therefore has only the number of times of minimizing to the average write operation in each sector of memory device, could prolong the serviceable life of memory device.Universal document systems such as at present general video recording system employing FAT32 are stored the video recording data.For general file system, it is very inhomogeneous to each the regional access frequency in the memory device, and the number of times that its block of information is wiped free of and rewrites is just very frequent, causes storage short key factor in serviceable life and Here it is.And file system is absolutely necessary concerning storage system, solves the frequent rewriting to file system information area, and can make the preservation of can cutting off the power supply of these information, just becomes focus.
Summary of the invention
In view of this, the invention reside in provides a kind of method for writing data that prolongs the data storage device life-span, to solve in the process that above-mentioned video recording system writes the video recording data, because read-write zone is inhomogeneous, causes short problem of memory device life-span.
For addressing the above problem, the invention provides a kind of method for writing data that prolongs the data storage device life-span, comprising:
Each data block information corresponding unit in setting and the memory device on nonvolatile memory; Sequential loop is searched the data block that is used to write on the message unit of nonvolatile memory; According to the order of each message unit, the data of will recording a video are written in corresponding each data block in proper order.
Preferably, each data block information corresponding unit is in described setting and the memory device:
Set up the one-to-one relationship of each data block and message unit, whether expression institute corresponding data piece is set in each message unit is attribute empty, that have invalid video recording data or the effective video recording of existence data.
Preferably, described when looking for first, described looking for: the first unit of finding out described each message unit;
Described search or write the video recording data after, also comprise: the attribute of next message unit that will put down in writing last data block institute corresponding informance unit of the data of recording a video is changed to sky.
Preferably, described search non-first the time, described looking for: find out attribute and be empty message unit.
Preferably, after described the searching, also comprise before writing the video recording data:
The attribute that judgement will write the pairing message unit of each data block of video recording data if be valid data, then sends warning message to the user.
Preferably, comprise in the described data block:
Be used to play the video recording data directory and the video recording data of video recording data.
Preferably, described nonvolatile memory is Fram or EPROM, and described memory device is SD card or CF card.
Method of the present invention, sequential storage video recording data in each data block are evenly stored the video recording data, the problem that the memory device life-span of avoiding local read-write frequently to cause reduces in each data block; By the attribute of message unit, can easy-to-look-up empty data block, before writing the video recording data,, prevent the effectively problem of video recording data that covers by the judgement of attribute.
Description of drawings
Fig. 1 is the process flow diagram among the embodiment;
Fig. 2 is the structural drawing of message unit among the embodiment;
Fig. 3 is the structural drawing of data block among the embodiment.
Embodiment
For clearly demonstrating the scheme among the present invention, provide preferred embodiment below and be described with reference to the accompanying drawings.
Referring to Fig. 1, comprising:
Step 11: each data block information corresponding unit in setting and the memory device on nonvolatile memory;
The structure of message unit as shown in Figure 1, the block of information of the file system of storing in equipment is divided into several message units (cell), each unit has represented it corresponding to memory device, the situation that takies as the some data blocks in SD card or the CF card, if each unit is made up of n bit, the situation that takies of definition status identification data block and the size information of data block respectively.For example use the example of 2 bits as follows:
00: vacant
01: the video recording data that alerting signal is invalid
10: the alerting signal data of effectively recording a video
11: standby
Nonvolatile memory can use Fram or EPROM etc., and memory device can use memory devices such as hard disk, SD card, the block data structure on the memory device, and referring to Fig. 3,
The SD card is divided into several pieces, and the capacity of each piece is FRAMFS_BLOCKSIZE, the 1st superblock (super block) that piece is the data field wherein, and other piece is a file data blocks.
Each data block is corresponding one by one with each message unit, and data block comprises data field superblock and file data blocks,
Data field superblock: some essential informations that are used for register system
File data blocks: be used for record video recording data, its structure comprises video recording data directory and video recording data two parts.Video recording data directory: write down some attributes of this data block, convenient inquiry; Video recording data: write down concrete video file data.
If the size of data block is FRAMFS_BLOCK_SIZE, the index of video recording data is FRAMFS_INDEX_SIZE, and the big or small FRAMFS_DATA_SIZE of the data of recording a video so is:
FRAMFS_DATA_SIZE
＝FRAMFS_BLOCK_SIZE-FRAMFS_INDEX_SIZE
Step 12: sequential loop is searched the data block that is used to write on the message unit of nonvolatile memory;
The actual capacity of file system can generate according to FRAM and SD card; If the message unit of file system information area size is cellinfosize bits, then the size in SD card respective file system information district: sd_size=(N+1) * cellinfosize (bits)
Wherein:
Capacity (the Bytes)/data block size of SD card data block total number TotalBlkcnt=SD card;
The file data blocks piece is counted N=TotalBlkcnt-1;
System is the actual capacity of sd_size and FRAM the most relatively, is as the criterion with wherein minimum value, and the size in the maximum information district that the system of obtaining takies: info_size, and obtain the actual capacity of file system:
(info_size/cellinfosize) * data block size (bytes)
When writing the video recording data to each data block of memory device, sequential loop is searched the data block that can be used for writing from each message unit earlier, owing to put down in writing the attribute information of each data block in each message unit, for example vacant or expired attribute informations such as invalid video recording data, write fashionable first, system can write the video recording data from the data block of first message unit correspondence, and after having write the video recording data, the attribute of the next message unit of last data block institute corresponding informance unit of record video recording data is changed to sky.
N (N＞1) inferior write fashionable, system's order in each message unit is sought attribute and is empty message unit, size order according to the video recording data is selected the pairing data block of each message unit, and the attribute of next message unit that will be used to put down in writing last data block institute corresponding informance unit of video recording data is changed to sky.
Step 13: according to the order of each message unit, the data of will recording a video are written in each data block in proper order;
Obtained each block of information in step 12, according to the data block of each block of information correspondence, because message unit and data block all are sequential loop structures, so sequential loop writes the video recording data.
Certainly, can also write earlier the video recording data in data block, and after having write the video recording data, change is used to put down in writing the attribute of next message unit of last data block institute corresponding informance unit of data of recording a video again.
When reading of data, sequential search first attribute is empty message unit in each message unit earlier, and the pairing data block of this message unit is the data head of video recording data.If in PC, then must handle the video recording data according to passage, channel information is stored in the video recording data directory in each data block.
The method of embodiment also comprises: after searching, write before the video recording data, the attribute of the pairing message unit of each data block that judgement will write the video recording data if be valid data, then sends warning message to the user.As alerting signal or the prompting information that whether continues to write.
Describe in detail above and write the record a video process of data and the structure of file system, during for use this document system on PC equipment, have matching relationship between nonvolatile memory and the memory device, for example: have following matching relationship when FRAM and SD card coupling:
In Framfs (FRAM FILE SYSTEM) file system, because the SD card is movably, so the differentiation of the coupling in file system information area and file data district is absolutely necessary.Because FRAM is fixed on the pcb board card, so the coupling of FRAM and SD card can think the coupling of equipment and SD card, can pass through 2 grades of match patterns, that is: the pattern that combines of device id and matching identification;
Device id: a slice E2PROM is all arranged in every equipment, wherein write down the sequence number (device id) of every equipment.
Matching identification: when each formatted file system, system adds 1 with matching identification.Equipment is at every turn after formaing file system, device id can be write in the variable of the memory device ID in the superblock of SD card, from E2PROM, read coupling ID simultaneously, and add 1, then it is stored among the E2PROM respectively and the superblock of SD card in be used for the variable of memory device ID.Behind system boot, can whether be used for this equipment by the SD card of relatively judging to device id, whether the SD card of relatively judging by matching identification is the most recently used card, has so just accomplished the coupling of file system information area and data field.
FRAM and the unmatched processing of SD card: after start, system software will call the Mount function, in the Mount function, to compare FRAM and whether the SD card mates, if do not match, will return this state, equipment will be pointed out warning, finally, reach coupling by the mode (format is handled) of manual intervention.
In Framfs file system of the present invention, if use the system of unmanned plane interactive interface (GUI), need in equipment, not inquire about the video recording data, therefore, recording channel and time just become nonsensical in file system, and this just is equivalent to have only a file section in equipment.
When this document system is formatd, at first fileinfo in the nonvolatile memory is all emptied (promptly being labeled as vacant), be empty then with the data block attribute in the memory device, and fill in superblock.
Method of the present invention, sequential storage video recording data in each data block are evenly stored the video recording data, the problem that the memory device life-span of avoiding local read-write frequently to cause reduces in each data block; By the attribute of message unit, can easy-to-look-up empty data block, before writing the video recording data,, prevent the effectively problem of video recording data that covers by the judgement of attribute.
For the method for being set forth in the embodiment of the invention, within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a method for writing data that prolongs the data storage device life-span is characterized in that, comprising:
Each data block information corresponding unit in setting and the memory device on nonvolatile memory; Sequential loop is searched the data block that is used to write on the message unit of nonvolatile memory; According to the order of each message unit, the data of will recording a video are written in corresponding each data block in proper order.
2. method for writing data according to claim 1 is characterized in that, each data block information corresponding unit is in described setting and the memory device:
Set up the one-to-one relationship of each data block and message unit, whether expression institute corresponding data piece is set in each message unit is attribute empty, that have invalid video recording data or the effective video recording of existence data.
3. method for writing data according to claim 2 is characterized in that, and is described when looking for first, described looking for: the first unit of finding out described each message unit;
Described search or write the video recording data after, also comprise: the attribute of next message unit that will put down in writing last data block institute corresponding informance unit of the data of recording a video is changed to sky.
4. method for writing data according to claim 3 is characterized in that, described search non-first the time, described looking for: find out attribute and be empty message unit.
5. method for writing data according to claim 4 is characterized in that, after described the searching, write video recording and also comprise before the data:
The attribute that judgement will write the pairing message unit of each data block of video recording data if be valid data, then sends warning message to the user.
6. method for writing data according to claim 1 is characterized in that, comprises in the described data block:
Be used to play the video recording data directory and the video recording data of video recording data.
7. method for writing data according to claim 1 is characterized in that, described nonvolatile memory is Fram or EPROM, and described memory device is SD card or CF card.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104699412A (en) * | 2013-12-09 | 2015-06-10 | 厦门雅迅网络股份有限公司 | Method for balancing magnetic disc abrasion |
| CN105721839A (en) * | 2016-04-27 | 2016-06-29 | 王正作 | Efficient unmanned aerial vehicle video transmission method |
| CN103617008B (en) * | 2013-12-11 | 2017-01-04 | 成都亿盟恒信科技有限公司 | Double SD card multimedia file storage system of Vehicular video monitoring terminal and method |
| CN107329703A (en) * | 2017-06-30 | 2017-11-07 | 武汉日新科技照明有限公司 | Dynamic storage method, apparatus and system |
| CN107591179A (en) * | 2017-09-11 | 2018-01-16 | 中国科学院上海微系统与信息技术研究所 | A kind of circuit structure and method of extended menory number of operations |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1186728C (en) * | 2001-07-03 | 2005-01-26 | 联想(北京)有限公司 | Method for managing flash memory files |
| CN100389406C (en) * | 2006-01-16 | 2008-05-21 | 深圳创维数字技术股份有限公司 | Method for operating data in non-volatile storage in embedded system |
-
2008
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104699412A (en) * | 2013-12-09 | 2015-06-10 | 厦门雅迅网络股份有限公司 | Method for balancing magnetic disc abrasion |
| CN103617008B (en) * | 2013-12-11 | 2017-01-04 | 成都亿盟恒信科技有限公司 | Double SD card multimedia file storage system of Vehicular video monitoring terminal and method |
| CN105721839A (en) * | 2016-04-27 | 2016-06-29 | 王正作 | Efficient unmanned aerial vehicle video transmission method |
| CN107329703A (en) * | 2017-06-30 | 2017-11-07 | 武汉日新科技照明有限公司 | Dynamic storage method, apparatus and system |
| CN107591179A (en) * | 2017-09-11 | 2018-01-16 | 中国科学院上海微系统与信息技术研究所 | A kind of circuit structure and method of extended menory number of operations |
| CN107591179B (en) * | 2017-09-11 | 2020-09-15 | 中国科学院上海微系统与信息技术研究所 | Circuit structure and method for expanding operation times of memory |
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| CN101751340B (en) | 2013-03-06 |
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Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518000 No. 1001 Nanshan Chi Park building B1 building 21-23 Patentee after: STREAMAX TECHNOLOGY CO., LTD. Address before: 518057, No. 5, building three, two software park, central science and technology zone, Nanshan District hi tech Zone, Guangdong, Shenzhen Patentee before: Shenzhen Streaming Video Technology Co., Ltd. |
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