CN1831786A - Data completeness protection method of flash storage - Google Patents
Data completeness protection method of flash storage Download PDFInfo
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- CN1831786A CN1831786A CN 200510022335 CN200510022335A CN1831786A CN 1831786 A CN1831786 A CN 1831786A CN 200510022335 CN200510022335 CN 200510022335 CN 200510022335 A CN200510022335 A CN 200510022335A CN 1831786 A CN1831786 A CN 1831786A
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Abstract
A method for protecting data completeness of flash storage includes calculating out calibration sum of data to be written in and storing data and said sum in blank region of write in storing zone then writing data with said sum in corresponding position in backup storing zone ( BSZ ), erasing off a block of data in main storing zone ( MSZ ) first and then erasing off a block of data in said position on BSZ, fetching and calibrating data of MSZ and fetching as well as calibrating data stored in said position on BSZ if data in MSZ is damaged, using effective data in BSZ to cover damaged data in MSZ.
Description
Technical field
The present invention relates to data storage, relate in particular to a kind of data completeness protection method of flash storage.
Background technology
Flash memory is a kind of high density, low cost, non-volatile, the semiconductor memory that can repeat to write, the interior data memory block is divided into many storage blocks of identical size, write operation to flash memory must carry out in the zone of blank, erase operation must be undertaken by storage block, if that is to say for a zone that has write data and want to write once more data, must earlier this regional place piece be wiped, write related data then and just can write success.Flash memory data recording write operation and erase operation speed are relatively slow, and it is when carrying out erase operation and write operation, and powered-off fault may make the data failure of whole storage block.
Usually the way that solves is to use a reserve battery, and is charged for a long time, and when powered-off fault, reserve battery can continue to power and guarantee normally finishing that data write down.But the method has its weak point, at first, increases reserve battery, has not only increased the complexity of hardware circuit design, and has increased cost; Secondly reserve battery has certain serviceable life; In addition, can't guarantee under some particular surroundingss that battery has electricity always, then still powered-off fault can take place in this case, make data failure in the whole storage block.
Therefore, the safe reliability of data storage function is lower in the prior art.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of safe and reliable data completeness protection method of flash storage is provided.
The present invention realizes that the scheme of above-mentioned purpose is: this data completeness protection method of flash storage is characterized in that: comprise following process:
Data write operation: calculate data to be written verification and, and with data and verification thereof with write the zone of the blank in the memory block; Look for relevant position, back-up storage district again, write above-mentioned have verification and data;
Data erase operation: wipe main storage area one blocks of data earlier, wipe a blocks of data of relevant position, back-up storage district again;
Data integrity detects and recovers: read the data with the verification main storage area, if the main storage area data damage, then read the storage block data with relevant position, verification back-up storage district, and cover main storage area corrupt data with the valid data in back-up storage district.Data are passed through the checking data checksum validation in main storage area and the back-up storage district,
If checksum validation is correct, then is valid data;
If checksum validation failure, then be corrupt data.
The main storage area is identical with back-up storage district data space size.
The invention has the beneficial effects as follows: in the present invention, flash memory is provided with main storage area and back-up storage district, when carrying out the write operation of data or erase operation, at first carry out in the main storage area, after operation is finished, carry out the backup of data in relevant position, back-up storage district again, so, if special circumstances take place when flash memory carries out write operation and erase operation, as abnormal power-down, and make the corrupted data in main storage area, promptly can be in energising laggard line data integrity detection and recovery, the valid data of back-up storage district same position are covered main storage area corrupt data, make the data of flash memory return to state before the outage, avoid loss of data, the safe and reliable storage of carrying out data.
In the present invention, the storage block data in main storage area and back-up storage district are by detecting data check and checking, promptly one piece of data is calculated and produce a value, whether change by the original data of this value check, and this value and raw data are preserved together, with the validity of this detection of stored blocks of data, further improved the safe reliability of data storage.
Description of drawings
Fig. 1 is the schematic flow sheet of data write operation of the present invention;
Fig. 2 is the schematic flow sheet of data erase operation of the present invention;
The schematic flow sheet that Fig. 3 detects and recovers for data integrity of the present invention;
Embodiment
The contrast accompanying drawing also is described in further detail the present invention in conjunction with the embodiments below:
Flash memory of the present invention is provided with main storage area and back-up storage district, and wherein main storage area and back-up storage district have one or more storage blocks respectively, and the write operation of flash memory data and erase operation are undertaken by storage block.
Main storage area and back-up storage district stored blocks of data if checksum validation is correct, then are valid data by detecting data check and checking; If checksum validation failure, then be corrupt data.Whether described verification and be that one piece of data calculate is produced a value can check original data to change by this value, and this value and raw data are preserved together.
Figure 1 shows that new data records write operation process, be specially: look for the zone of a blank in the main storage area, calculate data to be written verification and, and with data and verification thereof with write the zone of this blank; Look for relevant position, back-up storage district again, write above-mentioned have verification and data.
Figure 2 shows that storage block data recording erase operation process, be specially: wipe main storage area one blocks of data earlier, wipe a blocks of data of relevant position, back-up storage district again.
Figure 3 shows that the flash memory data integrity detects and rejuvenation, be specially: at first program reads data from the main storage area reference position; Verify these data verification and, if checksum validation is correct, read and verify next bar data by the main storage area Data Position, until reading and verification main storage area the last item data; If the checksum validation failure, then data are damaged, read the data of relevant position in the back-up storage district; The verification of checking back-up storage district relevant position data and, if checksum validation is correct, then the data with the back-up storage district cover main storage area corrupt data record, if the checksum validation failure, then data recording and data recording are invalid data, return and carry out the main storage area data recording.Repeat said process, finish, then finish the integrity detection and the recovery of main storage area data recording until main storage area the last item Data Detection.
Claims (3)
1. data completeness protection method of flash storage is characterized in that: comprise following process: data write operation: calculate data to be written verification and, and with data and verification thereof with write the zone of the blank in the memory block; Look for relevant position, back-up storage district again, write above-mentioned have verification and data;
Data erase operation: wipe main storage area one blocks of data earlier, wipe a blocks of data of relevant position, back-up storage district again;
Data integrity detects and recovers: read the data with the verification main storage area, if the main storage area data damage, then read the storage block data with relevant position, verification back-up storage district, and cover main storage area corrupt data with the valid data in back-up storage district.
2. data completeness protection method of flash storage according to claim 1 is characterized in that: data are passed through the checking data checksum validation in described main storage area and the back-up storage district,
If checksum validation is correct, then is valid data;
If checksum validation failure, then be corrupt data.
3. data completeness protection method of flash storage according to claim 2 is characterized in that: described main storage area is identical with back-up storage district data space size.
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| CN200510022335A CN100590606C (en) | 2005-12-14 | 2005-12-14 | Data completeness protection method of flash storage |
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| CN200510022335A CN100590606C (en) | 2005-12-14 | 2005-12-14 | Data completeness protection method of flash storage |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100462944C (en) * | 2007-03-07 | 2009-02-18 | 北京飞天诚信科技有限公司 | Power-fail protection method based on two continuous logical blocks for non-volatile memory |
| WO2009033397A1 (en) * | 2007-09-07 | 2009-03-19 | Artek Microelectronics Co., Ltd. | Method for accessing data in flash memory and data accessing controller |
| CN101154447B (en) * | 2006-09-28 | 2010-08-18 | 北京握奇数据系统有限公司 | Flash memory and its control method |
| CN101452409B (en) * | 2007-12-04 | 2010-10-13 | 无锡江南计算技术研究所 | Data verification redundant method and device |
| CN101894137A (en) * | 2010-06-23 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for restoring data in embedded database |
| WO2010139245A1 (en) * | 2009-06-02 | 2010-12-09 | 中兴通讯股份有限公司 | Method and device for reading and writing memory card |
| CN101430705B (en) * | 2008-11-29 | 2011-01-19 | 中兴通讯股份有限公司 | Memory method and apparatus based on embedded database |
| CN101515259B (en) * | 2009-03-26 | 2011-05-25 | 浙江大华技术股份有限公司 | Inserted device configuring data protecting method |
| CN101635020B (en) * | 2008-07-25 | 2011-12-07 | 联想(北京)有限公司 | Data erasing method and data storage device |
| CN101782875B (en) * | 2010-01-29 | 2012-01-04 | 成都市华为赛门铁克科技有限公司 | Storage unit and data storage method |
| CN102411523A (en) * | 2011-11-30 | 2012-04-11 | 广东威创视讯科技股份有限公司 | Method and device for storing file backups and backup method for file systems |
| CN101589399B (en) * | 2006-09-27 | 2012-11-14 | 信托逻辑流动有限公司 | System and method for securing data |
| CN103092727A (en) * | 2013-01-18 | 2013-05-08 | 大唐移动通信设备有限公司 | Data error correction method and device on flash storage medium |
| CN102103834B (en) * | 2009-12-22 | 2013-10-02 | 上海天马微电子有限公司 | Method and device for maintaining data of drive circuit |
| CN103608866A (en) * | 2013-03-15 | 2014-02-26 | 华为技术有限公司 | Data wiping method and device for flash memory |
| CN104424051A (en) * | 2013-09-03 | 2015-03-18 | 北京谊安医疗系统股份有限公司 | Respirator and log file read-write method and device therefor |
| CN105912418A (en) * | 2016-04-25 | 2016-08-31 | 湖南省湘电试验研究院有限公司 | Power distribution security chip power-down protection method based on CRC check manner |
| CN106227625A (en) * | 2016-09-05 | 2016-12-14 | 深圳震有科技股份有限公司 | The restoration methods of a kind of flash data damaged because of power down and system |
| CN106325773A (en) * | 2016-08-23 | 2017-01-11 | 浪潮(北京)电子信息产业有限公司 | Data consistency guaranteeing method and system of storage system and cache apparatus |
| CN107729769A (en) * | 2017-09-27 | 2018-02-23 | 深信服科技股份有限公司 | Data completeness protection method, equipment, system and readable storage medium storing program for executing |
| CN107808686A (en) * | 2016-09-09 | 2018-03-16 | 北京忆恒创源科技有限公司 | Read error method of testing and device |
| CN108228380A (en) * | 2016-12-22 | 2018-06-29 | 广州周立功单片机科技有限公司 | Critical data Safety Redundancy stores algorithm |
| CN110348245A (en) * | 2018-04-02 | 2019-10-18 | 深信服科技股份有限公司 | Data completeness protection method, system, device and storage medium based on NVM |
| CN111159781A (en) * | 2019-12-31 | 2020-05-15 | 海光信息技术有限公司 | Storage device data integrity protection method, controller thereof and system on chip |
| CN112527566A (en) * | 2020-12-24 | 2021-03-19 | 广东芬尼科技股份有限公司 | Equipment power-down operation parameter read-write abnormity protection method, system and storage medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4701618B2 (en) * | 2004-02-23 | 2011-06-15 | ソニー株式会社 | Information processing apparatus, information processing method, and computer program |
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2005
- 2005-12-14 CN CN200510022335A patent/CN100590606C/en active Active
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| CN101589399B (en) * | 2006-09-27 | 2012-11-14 | 信托逻辑流动有限公司 | System and method for securing data |
| CN101154447B (en) * | 2006-09-28 | 2010-08-18 | 北京握奇数据系统有限公司 | Flash memory and its control method |
| CN100462944C (en) * | 2007-03-07 | 2009-02-18 | 北京飞天诚信科技有限公司 | Power-fail protection method based on two continuous logical blocks for non-volatile memory |
| WO2009033397A1 (en) * | 2007-09-07 | 2009-03-19 | Artek Microelectronics Co., Ltd. | Method for accessing data in flash memory and data accessing controller |
| US8234541B2 (en) | 2007-09-07 | 2012-07-31 | Artek Microelectronics Co., Ltd. | Method and controller for data access in a flash memory |
| CN101452409B (en) * | 2007-12-04 | 2010-10-13 | 无锡江南计算技术研究所 | Data verification redundant method and device |
| CN101635020B (en) * | 2008-07-25 | 2011-12-07 | 联想(北京)有限公司 | Data erasing method and data storage device |
| CN101430705B (en) * | 2008-11-29 | 2011-01-19 | 中兴通讯股份有限公司 | Memory method and apparatus based on embedded database |
| CN101515259B (en) * | 2009-03-26 | 2011-05-25 | 浙江大华技术股份有限公司 | Inserted device configuring data protecting method |
| WO2010139245A1 (en) * | 2009-06-02 | 2010-12-09 | 中兴通讯股份有限公司 | Method and device for reading and writing memory card |
| US8775866B2 (en) | 2009-06-02 | 2014-07-08 | Zte Corporation | Method and device for reading and writing a memory card |
| CN102103834B (en) * | 2009-12-22 | 2013-10-02 | 上海天马微电子有限公司 | Method and device for maintaining data of drive circuit |
| CN101782875B (en) * | 2010-01-29 | 2012-01-04 | 成都市华为赛门铁克科技有限公司 | Storage unit and data storage method |
| CN101894137A (en) * | 2010-06-23 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for restoring data in embedded database |
| CN102411523A (en) * | 2011-11-30 | 2012-04-11 | 广东威创视讯科技股份有限公司 | Method and device for storing file backups and backup method for file systems |
| CN102411523B (en) * | 2011-11-30 | 2014-08-20 | 广东威创视讯科技股份有限公司 | Method and device for storing file backups and backup method for file systems |
| CN103092727A (en) * | 2013-01-18 | 2013-05-08 | 大唐移动通信设备有限公司 | Data error correction method and device on flash storage medium |
| CN103092727B (en) * | 2013-01-18 | 2015-08-26 | 大唐移动通信设备有限公司 | Data error-correcting method in flash storage medium and device |
| WO2014139184A1 (en) * | 2013-03-15 | 2014-09-18 | 华为技术有限公司 | Data erasing method and device for flash memory |
| US9823878B2 (en) | 2013-03-15 | 2017-11-21 | Huawei Technologies Co., Ltd. | Method and apparatus for erasing data in flash memory |
| CN103608866A (en) * | 2013-03-15 | 2014-02-26 | 华为技术有限公司 | Data wiping method and device for flash memory |
| US10007468B2 (en) | 2013-03-15 | 2018-06-26 | Huawei Technologies Co., Ltd. | Method and apparatus for erasing data in data section in flash memory |
| CN104424051A (en) * | 2013-09-03 | 2015-03-18 | 北京谊安医疗系统股份有限公司 | Respirator and log file read-write method and device therefor |
| CN105912418A (en) * | 2016-04-25 | 2016-08-31 | 湖南省湘电试验研究院有限公司 | Power distribution security chip power-down protection method based on CRC check manner |
| CN106325773A (en) * | 2016-08-23 | 2017-01-11 | 浪潮(北京)电子信息产业有限公司 | Data consistency guaranteeing method and system of storage system and cache apparatus |
| CN106325773B (en) * | 2016-08-23 | 2019-05-28 | 浪潮(北京)电子信息产业有限公司 | A kind of consistency ensuring method of memory system data, system and buffer storage |
| CN106227625A (en) * | 2016-09-05 | 2016-12-14 | 深圳震有科技股份有限公司 | The restoration methods of a kind of flash data damaged because of power down and system |
| CN106227625B (en) * | 2016-09-05 | 2019-08-20 | 深圳震有科技股份有限公司 | A kind of restoration methods and system of the flash data damaged by power down |
| CN107808686A (en) * | 2016-09-09 | 2018-03-16 | 北京忆恒创源科技有限公司 | Read error method of testing and device |
| CN108228380A (en) * | 2016-12-22 | 2018-06-29 | 广州周立功单片机科技有限公司 | Critical data Safety Redundancy stores algorithm |
| CN107729769A (en) * | 2017-09-27 | 2018-02-23 | 深信服科技股份有限公司 | Data completeness protection method, equipment, system and readable storage medium storing program for executing |
| CN110348245A (en) * | 2018-04-02 | 2019-10-18 | 深信服科技股份有限公司 | Data completeness protection method, system, device and storage medium based on NVM |
| CN111159781A (en) * | 2019-12-31 | 2020-05-15 | 海光信息技术有限公司 | Storage device data integrity protection method, controller thereof and system on chip |
| CN111159781B (en) * | 2019-12-31 | 2023-09-26 | 海光云芯集成电路设计(上海)有限公司 | Storage device data integrity protection method, controller thereof and system on chip |
| CN112527566A (en) * | 2020-12-24 | 2021-03-19 | 广东芬尼科技股份有限公司 | Equipment power-down operation parameter read-write abnormity protection method, system and storage medium |
| CN112527566B (en) * | 2020-12-24 | 2023-11-21 | 广东芬尼科技股份有限公司 | Method, system and storage medium for protecting read-write abnormality of equipment power-down operation parameters |
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