CN110379451B - SSD data loss prevention method and system and SSD using same - Google Patents
SSD data loss prevention method and system and SSD using same Download PDFInfo
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- CN110379451B CN110379451B CN201910530180.7A CN201910530180A CN110379451B CN 110379451 B CN110379451 B CN 110379451B CN 201910530180 A CN201910530180 A CN 201910530180A CN 110379451 B CN110379451 B CN 110379451B
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/22—Safety or protection circuits preventing unauthorised or accidental access to memory cells
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/04—Arrangements for writing information into, or reading information out from, a digital store with means for avoiding disturbances due to temperature effects
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/24—Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells
Abstract
The invention relates to the field of data storage, and discloses a method and a system for preventing data loss of an SSD (solid State disk) and the SSD using the method, wherein the method comprises the steps of obtaining the working temperature information of the SSD at the moment of power failure; acquiring current outside temperature information; according to the current external temperature information and the working temperature information, searching data disappearance time information corresponding to the current external temperature information and the working temperature information from the corresponding relationship among the external temperature information, the working temperature information and the data disappearance time information; and performing read-write operation according to the data disappearance time information. The invention has the effect of making the data not easy to disappear.
Description
Technical Field
The invention relates to the technical field of data storage, in particular to a method and a system for preventing data loss of an SSD and the SSD using the method.
Background
At present, a Solid state drive (Solid state drive) is commonly called a Solid state disk, and the Solid state disk is a hard disk made of an array of Solid state electronic memory chips, and is named by a Solid capacitor called Solid in english in taiwan. The SSD is composed of a control unit and a storage unit (FLASH chip, DRAM chip).
Conventionally, in a Single Level Cell (SLC) flash memory device, one transistor can accommodate 1 bit of data. Writing data to the cells through the electronic channel; a sufficiently high voltage is applied across the two terminals to create a sufficiently strong electric field that electrons will penetrate through the oxide and into the floating gate. The electrons will continue to stay on the floating gate when the voltage is removed. The voltage is passed through the channel without being applied to the gate, and the electrons will move in the other direction by the torsional bias, thereby realizing the storage and reading and writing of data.
The above prior art solutions have the following drawbacks: when the SSD is in a high temperature environment, electrons are more active, and the electrons are likely to disappear, so that the stored data is changed or even disappeared.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a system for preventing data loss of an SSD and the SSD using the method, and the SSD has the effect of enabling the data not to disappear easily.
In order to achieve the purpose, the invention provides the following technical scheme: a SSD data loss prevention method includes,
acquiring working temperature information of the SSD at the moment of power failure;
acquiring current outside temperature information;
according to the current external temperature information and the working temperature information, searching data disappearance time information corresponding to the current external temperature information and the working temperature information from the corresponding relationship among the external temperature information, the working temperature information and the data disappearance time information;
and performing read-write operation according to the data disappearance time information.
By adopting the technical scheme, the working temperature information of the SSD is acquired at the moment of power failure, then the current external temperature information is acquired, and through the corresponding relation among the working temperature information, the external temperature information and the data disappearance time information, the data disappearance time information is determined according to the external temperature information in real time, and the read-write operation is performed in time according to the data disappearance time information, so that the data in the SSD is repeatedly stored in a covering manner before disappearing, and the data in the SSD is not easy to disappear due to the influence of temperature.
The invention is further configured to: the acquiring of the current outside temperature information includes,
determining current application scene information;
according to the current application scene information, searching a temperature sampling mode corresponding to the current application scene information from the corresponding relation between the application scene information and the temperature sampling mode;
and carrying out temperature sampling according to the temperature sampling mode information and determining the external temperature information.
By adopting the technical scheme, the current application scene is determined, the corresponding temperature sampling mode is determined according to the current application scene, then temperature sampling is carried out according to the temperature sampling mode, and the external temperature information is determined, so that different temperature sampling modes are adopted according to different application scenes, and the temperature sampling is in accordance with the actual situation.
The invention is further configured to: the sampling of the temperature and the determination of the ambient temperature information may include,
acquiring sampling interval time information in the temperature sampling mode information;
acquiring sampling temperature information for multiple times according to the sampling interval time information;
the method comprises the steps of obtaining the range where a plurality of sampling temperature information are located, comparing the number of sampling points exceeding the preset range with a preset number information threshold value, and determining the external temperature information according to the comparison result.
By adopting the technical scheme, sampling is carried out for multiple times according to the sampling interval time information, the range in which the sampling temperature information is positioned is judged, the number of the sampling points exceeding the preset range is compared with the preset number information threshold value, and the external temperature information is determined according to the comparison result, so that the finally obtained external temperature information is relatively accurate.
The invention is further configured to: the determining of the outside temperature information according to the comparison result includes,
if the comparison result is less than or equal to the preset quantity information threshold, calculating the average value of a plurality of sampling temperature information within the preset range, and defining the average value as the external temperature information;
and if the comparison result is greater than the preset quantity information threshold, segmenting according to the time information, calculating the average value of a plurality of pieces of sampling temperature information in each segment, and summing and averaging the average values of each segment.
By adopting the technical scheme, if the number of the sampling points beyond the preset range is less than or equal to the preset number information threshold, the number of the sampling points beyond the range is less, normal temperature judgment is not influenced, and averaging operation is carried out on a plurality of sampling temperature information within the preset range; if the number of the sampling points exceeding the preset range is larger than the preset number information threshold, the number of the sampling points exceeding the range is large, normal temperature judgment is affected, segmentation is carried out according to the time information, the average value of a plurality of sampling temperature information in each segment is calculated, the average value of each segment is summed and averaged, and therefore the obtained external temperature information is accurate finally.
The invention is further configured to: the performing of the read-write operation according to the data disappearance time information includes,
acquiring the duration of current external temperature information;
acquiring the percentage of the data disappearance time occupied by the duration;
and accumulating and updating the percentages, judging whether the percentage value reaches a preset threshold value, and performing read-write operation if the percentage value reaches the preset threshold value.
By adopting the technical scheme, the percentage of the duration time of the external temperature occupying the data disappearance time is generated according to the duration time of the external temperature, the percentages are accumulated and updated in real time, whether the percentage value reaches the preset threshold value or not is judged, and when the percentage value reaches the preset threshold value, the read-write operation is carried out, so that the data in the SSD is not easy to disappear due to the temperature.
The invention is further configured to: the determining whether the percentage value reaches the preset threshold value may include,
determining a difference value between the percentage value and a preset threshold value;
if the difference value is negative and is greater than or equal to the preset approach line value, judging that the preset threshold value is reached;
if the difference is positive or equal to zero, determining that the preset threshold is reached;
and if the difference value is negative and smaller than the preset approach line value, determining that the preset threshold value is not reached.
By adopting the technical scheme, the difference value between the percentage value and the preset threshold value is determined, if the difference value is positive or equal to zero, the difference value indicates that the preset threshold value is just reached, and at the moment, the read-write operation is carried out; if the value is negative and less than or equal to the preset approach line value, the data is in an approach state although the preset threshold value is not reached, and the read-write operation is also performed at the moment in order to prevent the data from disappearing due to the fact that the threshold value is directly exceeded next time; if the value is negative and greater than the approach line value, the preset threshold value is not reached and the value is far away from the approach line value, so that the read-write operation is not performed.
The invention is further configured to: the obtaining of the operating temperature information of the SSD at the moment of power-off includes,
acquiring a power-off request of the SSD;
and immediately acquiring and storing the working temperature of the SSD according to the power-off request.
By adopting the technical scheme, after the power-off request of the SSD is obtained, the SSD obtains the working temperature of the SSD and stores the working temperature, so that the working temperature data can be conveniently called in the later period.
In order to achieve the purpose, the invention provides the following technical scheme: an SSD data loss prevention system, comprising,
the storage unit is used for storing and reading and writing data;
the temperature detection unit is used for acquiring outside temperature information and transmitting the outside temperature information to the storage unit;
and the power supply unit is used for supplying power to the storage unit and the temperature detection unit.
By adopting the technical scheme, the storage unit stores data and reads and writes the data, the temperature detection unit acquires external temperature information and transmits the external temperature information to the storage unit, the storage unit performs data reading and writing operation according to the acquired external temperature information, and the power supply unit supplies power to the storage unit and the temperature detection unit to realize operation in a power-off state.
In order to achieve the purpose, the invention provides the following technical scheme: an SSD, comprising a solid-state drive (SSD),
the solid state disk main body is used for storing and reading and writing data;
the temperature sensor is electrically connected with the solid state disk main body and used for acquiring outside temperature information and transmitting the outside temperature information to the solid state disk main body;
and the power supply is electrically connected with the temperature sensor and used for supplying power to the solid state disk main body and the temperature sensor.
By adopting the technical scheme, the solid state disk main body stores data and reads and writes the data, the temperature sensor acquires external temperature information and transmits the external temperature information to the solid state disk main body, the solid state disk main body performs data reading and writing operation according to the acquired external temperature information, and the power supply supplies power to the solid state disk main body and the temperature sensor, so that the operation in a power-off state is realized.
In conclusion, the invention has the following beneficial effects:
the working temperature information of the SSD is acquired when the power is off, the external temperature information is acquired after the power is off, and the data disappearance time information is determined according to the corresponding relation among the external temperature information, the working temperature information and the data disappearance time information, so that the data is read and written in time according to the external temperature information, and the data in the SSD is not easy to disappear.
Drawings
FIG. 1 is a diagram illustrating the steps of the present invention;
FIG. 2 is a block diagram of a system embodying a connection structure of a storage unit and a power supply unit;
fig. 3 is a system block diagram showing a connection structure between the solid state disk main body and a power supply.
Reference numerals: 1. a storage unit; 2. a temperature detection unit; 3. a power supply unit; 4. a solid state disk main body; 5. a temperature sensor; 6. and (4) a power supply.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a method for preventing data loss of an SSD disclosed by the present invention includes:
s1: acquiring working temperature information of the SSD at the moment of power failure;
the method comprises the steps of firstly obtaining a power-off request of the SSD, and obtaining and storing the working temperature of the SSD after obtaining the power-off request.
S2: acquiring current outside temperature information;
determining current application scene information, searching a temperature sampling mode corresponding to the current application scene information from the corresponding relation between the current application scene information and the temperature sampling mode, acquiring sampling interval time information in the temperature sampling mode information, and acquiring sampling temperature information for multiple times according to the sampling interval time information; the method comprises the steps of obtaining the range where a plurality of sampling temperature information are located, comparing the number of sampling points exceeding the preset range with a preset number information threshold value, and determining the external temperature information according to the comparison result. If the comparison result is less than or equal to the preset quantity information threshold, calculating the average value of a plurality of sampling temperature information within the preset range, and defining the average value as the external temperature information; and if the comparison result is greater than the preset quantity information threshold, segmenting according to the time information, calculating the average value of a plurality of pieces of sampling temperature information in each segment, and summing and averaging the average values of each segment.
For example, if the current SSD is in an environment with little temperature change, the application scenario information is that the sampling frequency is low, and the sampling interval time information in the temperature sampling mode corresponding to the low sampling frequency is once sampled for 30 minutes, the external temperature information is obtained according to the temperature sampling mode in which the sampling frequency is once sampled for 30 minutes, and there are 48 sampling points in one day. If the preset range is 30 ℃, the preset quantity information threshold is 20 points, and if the sampling temperature information of 40 sampling points is less than or equal to 30 ℃ and the sampling temperature information of 8 sampling points is greater than 30 ℃, the final external temperature information is the average value of the sampling temperature information of 40 sampling points; if the sampling temperature information of 20 sampling points is less than or equal to 30 ℃ and the sampling temperature information of 28 sampling points is greater than 30 ℃, dividing 48 sampling points into 8 sampling points to form a segment, calculating the average value of the sampling temperature information of 8 sampling points in each segment, summing and averaging the average values of 6 segments, and taking the external temperature information as the value after the summation and averaging.
S3: according to the current external temperature information and the working temperature information, searching data disappearance time information corresponding to the current external temperature information and the working temperature information from the corresponding relationship among the external temperature information, the working temperature information and the data disappearance time information;
and searching the data disappearance time information corresponding to the current external temperature information and the working temperature information according to the corresponding relationship among the external temperature information, the working temperature information and the data disappearance time information.
If the external temperature information is 30 degrees celsius at this time, the previously recorded working temperature information is 40 degrees celsius, and the corresponding data disappearance time information is 52 weeks at this time.
S4: and performing read-write operation according to the data disappearance time information.
The duration of the current external temperature information is obtained, the percentage of the data disappearance time occupied by the duration is obtained, the percentage is accumulated and updated, and whether the percentage value reaches a preset threshold value is judged. Firstly, determining a difference value between the percentage value and a preset threshold value, and if the difference value is negative and is greater than or equal to a preset approach line value, determining that the preset threshold value is reached; if the difference is positive or equal to zero, judging that the preset threshold is reached, and judging that the preset threshold is reached; and if the difference value is negative and smaller than the preset approach line value, determining that the preset threshold value is not reached. And if the preset threshold value is reached, performing read-write operation.
If the current external temperature information is 30 ℃, the current external temperature information lasts for 2 weeks, the percentage is 2/52, if the temperature change is 35 ℃, the corresponding data disappearance time information is 26 weeks, and if the current external temperature information lasts for 2 weeks, the percentage is 2/26. If the preset threshold is 90% and the preset approach line is-5%, when the percentage value is 89%, the difference value between the preset threshold and the percentage value is-1%, and the difference value is negative and is greater than or equal to the preset approach line value, the judgment is that the preset threshold is reached, and at this time, read-write operation is performed, so that the data in the SSD is updated and covered.
Referring to fig. 2, an SSD data loss prevention system includes a storage unit 1, a temperature detection unit 2, and a power supply unit 3, where the storage unit 1 is electrically connected to the temperature detection unit 2, and the power supply unit 3 is electrically connected to the temperature detection unit 2 and the storage unit 1. The storage unit 1 stores and reads and writes data and acquires working temperature information of the storage unit 1, the temperature detection unit 2 acquires external temperature information and transmits the external temperature information to the storage unit 1, and the power supply unit 3 supplies power to the temperature detection unit 2 and the storage unit 1.
Referring to fig. 3, the SSD includes a solid state disk main body 4, a temperature sensor 5 and a power supply 6, the solid state disk main body 4 is electrically connected to the temperature sensor 5, the power supply 6 is electrically connected to the solid state disk main body 4 and the temperature sensor 5, the power supply 6 is a lithium battery, and the temperature sensor 5 is DS18B 20. The solid state disk main body 4 acquires a power-off request, acquires and stores working temperature information of the solid state disk main body 4 during power-off, the temperature sensor 5 acquires outside temperature information and transmits the outside temperature information to the solid state disk main body 4, the control unit in the solid state disk main body 4 receives the outside temperature information and processes data, and the power supply 6 supplies power to the temperature sensor 5 and the solid state disk main body 4.
The implementation principle of the embodiment is as follows: when the SSD is powered off, the SSD receives a power-off request, simultaneously obtains and stores own working temperature information, after the external temperature information is obtained, the data disappearance time information is determined according to the corresponding relation among the external temperature information, the working temperature information and the data disappearance time information, then the percentage of the data disappearance time occupied by the duration time is obtained according to the duration time of the external temperature information, the percentage is accumulated and updated, meanwhile, the difference operation is carried out on the percentage and a preset threshold value, whether the read-write operation needs to be carried out or not is determined according to the obtained difference value, the data is re-covered, and after the SSD carries out the read-write operation again, the process of data disappearance needs to be restarted, so that the data in the SSD is not easy to disappear.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. A SSD data loss prevention method is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
acquiring working temperature information of the SSD at the moment of power failure;
acquiring current outside temperature information;
according to the current external temperature information and the working temperature information, searching data disappearance time information corresponding to the current external temperature information and the working temperature information from the corresponding relationship among the external temperature information, the working temperature information and the data disappearance time information;
and performing read-write operation according to the data disappearance time information.
2. The SSD method of claim 1, wherein: the acquiring of the current outside temperature information includes,
determining current application scene information;
according to the current application scene information, searching a temperature sampling mode corresponding to the current application scene information from the corresponding relation between the application scene information and the temperature sampling mode;
and carrying out temperature sampling according to the temperature sampling mode information and determining the external temperature information.
3. The SSD method of claim 2, wherein: the sampling of the temperature and the determination of the ambient temperature information may include,
acquiring sampling interval time information in the temperature sampling mode information;
acquiring sampling temperature information for multiple times according to the sampling interval time information;
the method comprises the steps of obtaining the range where a plurality of sampling temperature information are located, comparing the number of sampling points exceeding the preset range with a preset number information threshold value, and determining the external temperature information according to the comparison result.
4. The SSD method of claim 3, wherein: the determining of the outside temperature information according to the comparison result includes,
if the comparison result is less than or equal to the preset quantity information threshold, calculating the average value of a plurality of sampling temperature information within the preset range, and defining the average value as the external temperature information;
and if the comparison result is greater than the preset quantity information threshold, segmenting according to the time information, calculating the average value of a plurality of pieces of sampling temperature information in each segment, and summing and averaging the average values of each segment.
5. The SSD method of claim 1, wherein: the performing of the read-write operation according to the data disappearance time information includes,
acquiring the duration of current external temperature information;
acquiring the percentage of the data disappearance time occupied by the duration;
and accumulating and updating the percentages, judging whether the percentage value reaches a preset threshold value, and performing read-write operation if the percentage value reaches the preset threshold value.
6. The SSD method of claim 5, wherein: the determining whether the percentage value reaches the preset threshold value may include,
determining a difference value between the percentage value and a preset threshold value;
if the difference value is negative and is greater than or equal to the preset approach line value, judging that the preset threshold value is reached;
if the difference is positive or equal to zero, judging that the preset threshold is reached, and judging that the preset threshold is reached;
and if the difference value is negative and smaller than the preset approach line value, determining that the preset threshold value is not reached.
7. The SSD method of claim 1, wherein: the obtaining of the operating temperature information of the SSD at the moment of power-off includes,
acquiring a power-off request of the SSD;
and immediately acquiring and storing the working temperature of the SSD according to the power-off request.
8. A system for applying the SSD method of any of claims 1-7 to prevent data loss, characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a storage unit (1) for storing and reading and writing data;
the temperature detection unit (2) is used for acquiring outside temperature information and transmitting the outside temperature information to the storage unit (1);
and the power supply unit (3) is used for supplying power to the storage unit (1) and the temperature detection unit (2).
9. An SSD applying the method of any of claims 1-7 for preventing data loss thereto, characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the solid state disk main body (4) is used for storing and reading and writing data;
the temperature sensor (5) is electrically connected with the solid state disk main body (4) and is used for acquiring outside temperature information and transmitting the outside temperature information to the solid state disk main body (4);
and the power supply (6) is electrically connected with the solid state disk main body (4) and the temperature sensor (5) and is used for supplying power to the solid state disk main body (4) and the temperature sensor (5).
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| US5956350A (en) * | 1997-10-27 | 1999-09-21 | Lsi Logic Corporation | Built in self repair for DRAMs using on-chip temperature sensing and heating |
| KR101224919B1 (en) * | 2006-02-07 | 2013-01-22 | 삼성전자주식회사 | Semiconductor memory device controlling output voltage level of high voltage generator according to temperature varation |
| JP2008071440A (en) * | 2006-09-14 | 2008-03-27 | Matsushita Electric Ind Co Ltd | Ferroelectric memory device and its control method |
| JP2011164994A (en) * | 2010-02-10 | 2011-08-25 | Toshiba Corp | Memory system |
| CN103714844A (en) * | 2012-10-08 | 2014-04-09 | 昆达电脑科技(昆山)有限公司 | Portable storage device having humiture testing function |
| CN103915111B (en) * | 2013-01-09 | 2016-08-10 | 华邦电子股份有限公司 | Storage arrangement and power supply method of adjustment thereof |
| US9165668B1 (en) * | 2013-07-29 | 2015-10-20 | Western Digital Technologies, Inc. | Data retention monitoring using temperature history in solid state drives |
| CN104199765B (en) * | 2014-08-14 | 2018-09-11 | 北京金山安全软件有限公司 | Method and device for acquiring normal temperature value range of terminal device and terminal |
| US10269439B2 (en) * | 2017-03-28 | 2019-04-23 | Western Digital Technologies, Inc. | Post write erase conditioning |
| KR20180130872A (en) * | 2017-05-30 | 2018-12-10 | 에스케이하이닉스 주식회사 | Storage device and operating method thereof |
| CN108052292A (en) * | 2017-12-25 | 2018-05-18 | 成都信息工程大学 | A kind of high-temperature protection method of solid state disk |
| CN109710443B (en) * | 2018-12-24 | 2023-06-16 | 平安科技（深圳）有限公司 | Data processing method, device, equipment and storage medium |
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