CN113050889A - Flash multi-block read-write anti-interference method, system, device and storage medium - Google Patents
Flash multi-block read-write anti-interference method, system, device and storage medium Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0614—Improving the reliability of storage systems
- G06F3/0616—Improving the reliability of storage systems in relation to life time, e.g. increasing Mean Time Between Failures [MTBF]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/064—Management of blocks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
- G06F3/0652—Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
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Abstract
The application relates to a Flash multi-block read-write anti-interference method, a Flash multi-block read-write anti-interference system, a Flash multi-block read-write anti-interference device and a Flash multi-block read-write storage medium, and relates to the technical field of multi-block read-write, wherein the method comprises the following steps: performing sampling inspection scanning, and reading and writing data for each block to obtain the scanning ending of each block; checking for block interference according to the number of blocks, such as only 2 blocks A, B; and establishing an interference table according to the influenced relation, and packaging the blocks according to the interference relation. The method and the device have the effects of ensuring the stability of the storage device and prolonging the service life of the storage device.
Description
Technical Field
The present application relates to the field of multi-block read/write technologies, and in particular, to a Flash multi-block read/write anti-interference method, system, device, and storage medium.
Background
When scanning blocks, the blocks are classified, and only one block of data is scanned at a time. For example, scanning a, B blocks is performed in the order a, B. The block is divided into different blocks according to the characteristics of Flash, and the blocks with the power of 2 indexes form the block number of Flash. Due to this property, the difference between different blocks is caused, and therefore, the scanning is performed on a block-by-block basis, but also because of this, the interference between blocks is amplified or ignored.
However, since the data of a is processed in the order of a and B, if there is a block interference problem for B, it cannot be excluded by this scanning method, because the B block is operated later, and there is no valid data in the B area, so that the B area cannot be detected, however, in actual use, the block is rotated around, which may cause the data of the original valid block a to be damaged when the B block is operated. Two blocks operate in sequence, so that mutual influence is generated, the previous scanning process is difficult to detect, and the data stability is poor.
According to the difference of the operation sequence of the blocks, the data in different blocks can be affected, namely, the data is in error, and in detail, the data in the later operation block and the data in the previous operation block generate interference, so that the instability of the storage device is caused, and the damage to the service life of the storage device is caused.
Disclosure of Invention
In order to ensure the stability of the storage device and prolong the service life of the storage device, the application provides a Flash multi-block read-write anti-interference method, a Flash multi-block read-write anti-interference system, a Flash multi-block read-write anti-interference device and a storage medium.
In a first aspect, the present application provides a Flash multi-block read-write anti-interference method, which adopts the following technical scheme:
a Flash multi-block read-write anti-interference method comprises the following steps:
performing sampling inspection scanning, and reading and writing data for each block to obtain the scanning ending of each block;
checking for block interference according to the number of blocks, such as only 2 blocks A, B;
and establishing an interference table according to the influenced relation, and packaging the blocks according to the interference relation.
By adopting the technical scheme, the structure of the block A and the block B is influenced by the characteristics of Flash, and the number of the blocks is increased along with the increase of the Flash capacity, for example, 4 blocks and 8 blocks mostly satisfy the power of 2. Because of the characteristics of Flash, differences necessarily exist between the blocks, and therefore the algorithm is purposefully proposed to solve the problem of interference between the blocks. Specifically, when data of a block a is read and written to interfere data of a block B, a table is established for the blocks, similarly, the interfered blocks are sequentially collected, the block a and the block B are packed together, the block a and the block B are packed, and an interference relationship is established, so that the block a and the block B need to be operated simultaneously to avoid cyclic use of the block a and the block B, thereby reducing the risk of data damage caused by block interference and improving the system stability.
Optionally, the step of checking the block interference according to the number of blocks, if there are only 2 blocks a, B, includes:
writing data in the A block;
reading the change condition of the original data in the block B and judging whether the data is interfered or not;
if the judgment result is yes, the interference relation is detected, and an instruction for establishing an interference table is triggered.
Optionally, the step of checking the block interference according to the number of blocks, if there are only 2 blocks a, B, further includes:
writing data in the B block;
reading the change condition of original data in the block A and judging whether the data is interfered or not;
if the judgment result is yes, the interference relation is detected, and an instruction for establishing an interference table is triggered.
By adopting the technical scheme, assuming that only two blocks A and B exist, after data is written into the block A, the change condition of original data in the block B is read, whether the data is interfered is judged, the operation is reversed in the same way, and when the data is written into the block B, the change condition of the data in the block A is checked. If the interference relationship is detected, a table of the interference relationship is created, such as combining 2 blocks into one large block, and the physical characteristics are recorded in the table. When the a block needs to be operated separately, the data in the affected B block is transferred to a reliable block, and then rewritten together with the data of the a block, so as to ensure the system stability.
Optionally, in the step of reading a change condition of original data in the B block and determining whether the data is interfered: the original data of the B block operation is affected by the a block, and the specific effect is reflected in the data type, i.e. data error.
Optionally, if the determination is yes, after the step of detecting the interference relationship and triggering the instruction for establishing the interference table: several interference relationships are not detected, and the original data is regarded as data to be erroneous.
By adopting the technical scheme, the data can not be detected, the original data can only be regarded as data errors, and other error solving modes are used for trying to recover the data so as to ensure the integrity of interference detection.
Optionally, in the step of establishing an interference table according to the affected relationship and packing a plurality of blocks according to the interference relationship: the a and B blocks need to be operated simultaneously.
Optionally, the method further includes:
pre-erasing is carried out, and the state of each block after erasing is detected;
writing detection data into the block A;
then, the corresponding block B variation is detected.
In a second aspect, the present application provides a Flash multi-block read-write anti-interference system, which adopts the following technical scheme:
a Flash multi-block read-write anti-interference system comprises:
the scanning module is used for performing sampling inspection scanning, reading and writing data for each block and obtaining the scanning ending of each block;
a block checking module for checking block interference according to the number of blocks, if only 2 blocks A, B;
and the table establishing module is used for establishing an interference table according to the influenced relation and packaging the blocks according to the interference relation.
By adopting the technical scheme, the structure of the block A and the block B is influenced by the characteristics of Flash, and the number of the blocks is increased along with the increase of the Flash capacity, for example, 4 blocks and 8 blocks mostly satisfy the power of 2. Because of the characteristics of Flash, differences necessarily exist between the blocks, and therefore the algorithm is purposefully proposed to solve the problem of interference between the blocks. Specifically, when data of a block a is read and written to interfere data of a block B, a table is established for the blocks, similarly, the interfered blocks are sequentially collected, the block a and the block B are packed together, the block a and the block B are packed, and an interference relationship is established, so that the block a and the block B need to be operated simultaneously to avoid cyclic use of the block a and the block B, thereby reducing the risk of data damage caused by block interference and improving the system stability.
In a third aspect, the present application provides a Flash multi-block read-write anti-jamming device, which adopts the following technical scheme:
a Flash multi-block read-write anti-interference device comprises a memory and a processor, wherein a computer program which can be loaded by the processor and can execute any method is stored in the memory.
By adopting the technical scheme, the structure of the block A and the block B is influenced by the characteristics of Flash, and the number of the blocks is increased along with the increase of the Flash capacity, for example, 4 blocks and 8 blocks mostly satisfy the power of 2. Because of the characteristics of Flash, differences necessarily exist between the blocks, and therefore the algorithm is purposefully proposed to solve the problem of interference between the blocks. Specifically, when data of a block a is read and written to interfere data of a block B, a table is established for the blocks, similarly, the interfered blocks are sequentially collected, the block a and the block B are packed together, the block a and the block B are packed, and an interference relationship is established, so that the block a and the block B need to be operated simultaneously to avoid cyclic use of the block a and the block B, thereby reducing the risk of data damage caused by block interference and improving the system stability.
In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solutions:
a computer readable storage medium storing a computer program capable of being loaded by a processor and performing any of the methods described above.
By adopting the technical scheme, the structure of the block A and the block B is influenced by the characteristics of Flash, and the number of the blocks is increased along with the increase of the Flash capacity, for example, 4 blocks and 8 blocks mostly satisfy the power of 2. Because of the characteristics of Flash, differences necessarily exist between the blocks, and therefore the algorithm is purposefully proposed to solve the problem of interference between the blocks. Specifically, when data of a block a is read and written to interfere data of a block B, a table is established for the blocks, similarly, the interfered blocks are sequentially collected, the block a and the block B are packed together, the block a and the block B are packed, and an interference relationship is established, so that the block a and the block B need to be operated simultaneously to avoid cyclic use of the block a and the block B, thereby reducing the risk of data damage caused by block interference and improving the system stability.
Drawings
FIG. 1 is a flowchart of a Flash multi-block read-write anti-interference method in the embodiment of the present application.
FIG. 2 is a flowchart illustrating a method for detecting block interference according to an embodiment of the present invention.
Fig. 3 is a block diagram of a Flash multi-block read-write anti-interference system in the embodiment of the present application.
Description of reference numerals: 1. a scanning module; 2. a block checking module; 3. and a table establishing module.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a Flash multi-block read-write anti-interference method. Referring to fig. 1, a Flash multi-block read-write anti-interference method includes:
s1, a sampling scan is performed to read and write data for each block.
At this time, the scanning end of each block, such as ECC, and physical parameters of a page of erroneous bit data, can be obtained.
S2, checking the block interference according to the number of blocks. If there are only 2 blocks a, B, check a affects B, then it is necessary to write data to B, then write data to block a, check B block for data transformation, and the reverse operation is done for B affects a. If only two blocks A and B exist, after the data is written into the block A, the change condition of the original data in the block B is read, whether the data is interfered is judged, the operation is also required to be performed in reverse once, and when the data is written into the block B, the change condition of the data in the block A is checked.
Referring to fig. 2, taking the existence of two blocks a and B as an example, S2 specifically includes:
s201, writing data in the A block; the A-block write generates the check data through an algorithm.
S202, the change situation of the original data in the B block is read, and whether the data is interfered or not is judged. The original data of the B block operation is influenced by the A block, and the specific influence is reflected in data errors; if the B block does not perform the write operation, the B block should satisfy its original characteristic, i.e., the original state, which is to read the data of the B block to determine whether the data is affected by the a block.
Then, S204, writing data in the B block;
s205, the variation of the original data in the block A is read, and whether the data is interfered is judged. The original data of the block A operation is influenced by the block B, and the specific influence is also reflected by data errors;
s206, if the judgment result is yes, the interference relation is detected, and an instruction for establishing an interference table is triggered.
If only two blocks A and B exist, after the data is written into the block A, the change condition of the original data in the block B is read, whether the data is interfered is judged, the reverse operation is needed in the same way, and when the data is written into the block B, the change condition of the data in the block A is checked.
Specifically, triggering the establishment of the interference table a- > B, that is, a affects B, when the following operations are performed, a and B blocks are packed, and B needs to be operated before a, because it cannot be excluded whether some blocks in B blocks are B- > a, that is, B blocks affect a, a subsequent reverse check is also needed. Similarly, the block of which B influences A is extracted, and the table B- > A is established, so that the comprehensive block anti-interference AB table can be formed by combining the previous table A- > B.
In addition, several interference relationships cannot be detected, and the original data is regarded as data error.
Judging whether the interference block of the block is A interference B or B interference A, arranging and packaging the interference blocks into a large block according to the sequence, establishing a table and storing the interference relationship. The sequence of packing into a large block is determined according to the number of blocks, for example, if there are 2 blocks, 2 possibilities may occur, a affects B, B affects a; however, when there are 4 blocks, there is interference among 4 blocks a, B, C, D, and there are many cases, which are not listed here.
Referring back to fig. 1, S3, an interference table is established according to the affected relationship, and a plurality of blocks are packed according to the interference relationship. And B affects B, the data of the B block is stored when the A block is operated, and the data in the B block is read again after the A block is operated, otherwise, the same is true when B affects A.
Specifically, if the interference relationship is detected, a table of the interference relationship needs to be established, such as combining 2 blocks into one large block, and the physical characteristics also need to be recorded in the table. When the a block needs to be operated separately, the data in the affected B block is transferred to a reliable block, and then rewritten together with the data of the a block, so as to ensure the system stability.
Referring to fig. 1, in addition, the method further includes:
s4, pre-erasing, detecting the state of each block after erasing;
s5, writing the detection data into the block a;
s6, detecting the variation of the corresponding block B; and detecting whether the change of the check data of the B block reaches an error threshold value for establishing an interference table or not. .
Because the interference table AB is established, the operation is performed according to the specified sequence of the AB interference table, namely, the writing and the erasing of Flash are performed according to the interference table AB, so that the Flash capacity can be better utilized, and the stability of data is improved.
Specifically, the sequence of operations before and after a block affects the stability of data, and in addition, the data structure of the block, such as a and B interference, also has a problem, if the a block and the B block are all written with data, or the a block and the B block are all erased, the a block and the B block are normal at this time, that is, the a block and the B block need to be operated simultaneously, but this cannot be guaranteed due to the cyclic use of the blocks in the past operation, at this time, if one block of the a block and the B block needs to be written, the a block and the B block need to be erased, but due to the data influence of the a block and the B block, if a block is erased, the data of the other block has errors. However, in the present application, the a and B blocks are packed to establish the interference relationship, and the a and B blocks need to be operated simultaneously, so that such problems can be avoided.
The implementation principle of the Flash multi-block read-write anti-interference system in the embodiment of the application is as follows: the configuration of the block a and the block B is influenced by the characteristics of Flash itself, and the number of blocks becomes larger as the Flash capacity becomes larger, for example, 4 blocks and 8 blocks mostly satisfy the power of 2. Because of the characteristics of Flash, differences necessarily exist between the blocks, and therefore the algorithm is purposefully proposed to solve the problem of interference between the blocks. Specifically, when data of a block a is read and written to interfere data of a block B, a table is established for the blocks, similarly, the interfered blocks are sequentially collected, the block a and the block B are packed together, the block a and the block B are packed, and an interference relationship is established, so that the block a and the block B need to be operated simultaneously to avoid cyclic use of the block a and the block B, thereby reducing the risk of data damage caused by block interference and improving the system stability.
Based on the method, the embodiment of the application also discloses a Flash multi-block read-write anti-interference system. Referring to fig. 3, the Flash multi-block read-write anti-interference system includes:
the scanning module 1 is used for sampling inspection and scanning, reading and writing data for each block, and obtaining the scanning ending of each block;
a block checking module 2, wherein the block checking module 2 is used for checking the block interference according to the number of the blocks, such as only 2 blocks A, B;
and the table establishing module 3 is used for establishing an interference table according to the affected relationship and packing the blocks according to the interference relationship.
The method comprises the steps of establishing an A- > B interference table and a B- > A interference table respectively, and then integrating the two tables into an interference table AB according to the influence strength relation. Because the interference table AB is established, the operation is performed according to the specified sequence of the AB interference table, namely, the writing and the erasing of Flash are performed according to the interference table AB, so that the Flash capacity can be better utilized, and the stability of data is improved.
The implementation principle of the Flash multi-block read-write anti-interference system in the embodiment of the application is as follows: the configuration of the block a and the block B is influenced by the characteristics of Flash itself, and the number of blocks becomes larger as the Flash capacity becomes larger, for example, 4 blocks and 8 blocks mostly satisfy the power of 2. Because of the characteristics of Flash, differences necessarily exist between the blocks, and therefore the algorithm is purposefully proposed to solve the problem of interference between the blocks. Specifically, when data of a block a is read and written to interfere data of a block B, a table is established for the blocks, similarly, the interfered blocks are sequentially collected, the block a and the block B are packed together, the block a and the block B are packed, and an interference relationship is established, so that the block a and the block B need to be operated simultaneously to avoid cyclic use of the block a and the block B, thereby reducing the risk of data damage caused by block interference and improving the system stability.
The embodiment of the application also discloses a Flash multi-block read-write anti-jamming device, which comprises a memory and a processor, wherein the memory is stored with a computer program which can be loaded by the processor and can execute the Flash multi-block read-write anti-jamming method.
The embodiment of the application also discloses a computer readable storage medium. The computer readable storage medium stores therein a computer program that can be loaded by a processor and executes the above Flash multi-block read-write anti-interference method, and includes, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above examples are only used to illustrate the technical solutions of the present invention, and do not limit the scope of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from these embodiments without making any inventive step, fall within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still make various combinations, additions, deletions or other modifications of the features of the embodiments of the present invention according to the situation without conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present invention, and these technical solutions also fall within the protection scope of the present invention.
Claims (10)
1. A Flash multi-block read-write anti-interference method is characterized by comprising the following steps:
performing sampling inspection scanning, and reading and writing data for each block to obtain the scanning ending of each block;
checking for block interference according to the number of blocks, such as only 2 blocks A, B;
and establishing an interference table according to the influenced relation, and packaging the blocks according to the interference relation.
2. The Flash multi-block read-write anti-interference method according to claim 1, wherein the step of checking the block interference according to the number of blocks, if only 2 blocks a, B, comprises:
writing data in the A block;
reading the change condition of the original data in the block B and judging whether the data is interfered or not;
if the judgment result is yes, the interference relation is detected, and an instruction for establishing an interference table is triggered.
3. The Flash multi-block read-write anti-interference method according to claim 1, wherein the step of reading the change condition of the original data in the block B and determining whether the data is interfered comprises: the original data of the B block operation is affected by the a block, and the specific effect is reflected in the data type, i.e. data error.
4. The Flash multi-block read-write anti-interference method according to claim 3, wherein if the determination is yes, an interference relationship is detected, and after the step of triggering an instruction for establishing an interference table: several interference relationships are not detected, and the original data is regarded as data to be erroneous.
5. The Flash multi-block read-write anti-interference method according to claim 1, wherein the step of checking the block interference according to the number of blocks, if there are only 2 blocks a, B, further comprises:
writing data in the B block;
reading the change condition of original data in the block A and judging whether the data is interfered or not;
if the judgment result is yes, the interference relation is detected, and an instruction for establishing an interference table is triggered.
6. The Flash multi-block read-write anti-interference method according to claim 5, wherein in the step of establishing the interference table according to the affected relationship and packaging the plurality of blocks according to the interference relationship: the a and B blocks need to be operated simultaneously.
7. The Flash multi-block read-write anti-interference method according to claim 1, further comprising:
pre-erasing is carried out, and the state of each block after erasing is detected;
writing detection data into the block A;
then, the corresponding block B variation is detected.
8. A Flash multi-block read-write anti-interference system is characterized by comprising:
the scanning module (1) is used for performing sampling inspection scanning, reading and writing data for each block and obtaining the scanning ending of each block;
a block checking module (2) for checking block interference according to the number of blocks, if only 2 blocks A, B;
and the table establishing module (3) is used for establishing an interference table according to the influenced relation and packaging the blocks according to the interference relation.
9. A Flash multi-block read-write anti-interference device is characterized in that: comprising a memory and a processor, said memory having stored thereon a computer program which can be loaded by the processor and which performs the method of any of claims 1 to 7.
10. A computer-readable storage medium characterized by: a computer program which can be loaded by a processor and which performs the method according to any one of claims 1 to 7.
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| CN202110308999.6A CN113050889A (en) | 2021-03-23 | 2021-03-23 | Flash multi-block read-write anti-interference method, system, device and storage medium |
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| CN202110308999.6A CN113050889A (en) | 2021-03-23 | 2021-03-23 | Flash multi-block read-write anti-interference method, system, device and storage medium |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101494085A (en) * | 2008-01-22 | 2009-07-29 | 群联电子股份有限公司 | Method and controller for preventing nonvolatile semiconductor memory from occurring read interference |
| CN101770813A (en) * | 2008-12-31 | 2010-07-07 | 联咏科技股份有限公司 | Detection method for detecting interference phenomenon of adjacent blocks of non-volatile storage |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101494085A (en) * | 2008-01-22 | 2009-07-29 | 群联电子股份有限公司 | Method and controller for preventing nonvolatile semiconductor memory from occurring read interference |
| CN101770813A (en) * | 2008-12-31 | 2010-07-07 | 联咏科技股份有限公司 | Detection method for detecting interference phenomenon of adjacent blocks of non-volatile storage |
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