CN108897499A - The kind identification method of block in a kind of flash memory - Google Patents
The kind identification method of block in a kind of flash memory Download PDFInfo
- Publication number
- CN108897499A CN108897499A CN201810794564.5A CN201810794564A CN108897499A CN 108897499 A CN108897499 A CN 108897499A CN 201810794564 A CN201810794564 A CN 201810794564A CN 108897499 A CN108897499 A CN 108897499A
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- CN
- China
- Prior art keywords
- type identification
- block
- byte
- flash memory
- value
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Classifications
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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
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0614—Improving the reliability of storage systems
-
- 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
- G06F3/0653—Monitoring storage devices or systems
-
- 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
- G06F3/0673—Single storage device
- G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
Abstract
The invention discloses a kind of kind identification methods of block in flash memory, type identification is written in by least two bytes of the first page spare area of operating block, after solution is out-of-order, the value of the byte of write-in type identification before checking, if have two or two or more it is equal, i.e., using equal value as type identification.The type misjudgment rate of block in flash memory can be effectively reduced.
Description
Technical field
The present invention relates to the kind identification methods of block in flash memory technology field more particularly to flash memory.
Background technique
Flash memory is the memory device of non-deorienting, there is a three-level unit (TLC) of three bits of storage, two bits it is more
Grade unit (MLC) flash memory and single stage unit (SLC) flash memory.Regardless of flash memory, require to control core through memory
Piece control flash chip, memory control chip sending flash memory command (such as read instruction, write-in/programming instruction and erasing and refer to
Enable) after, flash chip makes corresponding behavior and reads or be written data.When data are written, to make 0 and 1 average mark in data
Cloth reduces error rate, data will be stored into flash memory after doing out-of-order operation again, therefore when reading data, need in memory space
First solution is out-of-order, then output data.
Erasing instruction wipes the content of storage, content type (code, data or the behaviour of same piece of preservation in blocks
Conversion table needed for making) it is identical.Block is made of page, and every page has a spare area, to store the letter other than data
Breath.In order to recognize the type of block, with the first character section of every piece of first page spare area record this block type (such as storage code
Block be stored in 0x01 in this position, store the blocks of data in this position and be stored in 0x02, the block for storing conversion table is stored in this position
0x03).Random ordering when due to by being written and solution when reading are out-of-order, and the number of this byte once malfunctions in the process, this block
Type just will be by false judgment, to influence the accuracy of flash memory.
Summary of the invention
The purpose of the present invention is to provide a kind of kind identification methods of block in flash memory, and the type of block in flash memory is effectively reduced
Misjudgment rate.
Realizing the technical solution of above-mentioned purpose is：
The kind identification method of block, writes in by least two bytes of the first page spare area of operating block in a kind of flash memory
Enter type identification, after solution is out-of-order, the value of the byte of write-in type identification before checking, if having two or two or more it is equal,
I.e. using equal value as type identification.
Preferably, when type identification is written, type identification adds positive integer；When checking type identification, type identification is subtracted
Added positive integer before.
Preferably, by the first of the first page spare area of operating block, ith and jth byte be respectively written into type identification,
Type identification+n and type identification+2n；Wherein, two different positive integers that i, j are non-1；N is positive integer；
Memory is written in the data random ordering of entire block；
Data are read after solution random ordering；
It checks by the first of the first page spare area of operating block, ith and jth byte, the value of the first byte, the i-th byte
Value subtract n and the value of jth byte subtracts 2n, have in these three values two or three it is equal, i.e., using equal value as type mark
Know.
The beneficial effects of the invention are as follows：The present invention creates multiple decision conditions, avoids random ordering by increasing type identification
The misjudgment of type caused by mistake occurs during reconciliation is out-of-order, reduces the risk of corrupt data, and then promotes data and deposits
The accuracy of storage.
Detailed description of the invention
Fig. 1 is the flow chart of the kind identification method of block in flash memory of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
The kind identification method of block in flash memory of the invention, by least two bytes of the first page spare area of operating block
Middle write-in type identification when type identification is written, can add positive integer with type identification.After solution is out-of-order, be written before checking
The value of the byte of type identification, when checking type identification, if type identification added with positive integer, type identification subtracts it before
Preceding added positive integer.If have two or two or more it is equal, i.e., using equal value as type identification.
Specifically, the present embodiment, referring to Fig. 1, kind identification method of the invention, includes the following steps：
Type identification I, the value of type identification is written to by the first character section of the first page spare area of operating block in step S1
For m.0x01 is the type identification of code, and 0x02 is the type identification of data, and 0x03 is the type identification of conversion table.
Step S2, to a by i-th (any non-1 positive integer, example in select pool i=2) of the first page spare area of operating block
Type identification II is written in byte, and type identification adds n (any positive integer, example in select n=5), is worth for m+5.
Step S3, to (positive integer of any non-1 and non-i selects pool j in example by the jth of the first page spare area of operating block
=3) type identification III is written in a byte, and type identification adds 2n, is worth for m+10.
The data of step S4, entire block are stored in flash memory by random ordering.
Step S5, when reading, data are read by solution is out-of-order.
Step S6 checks by the first of the first page spare area of operating block, ith and jth byte, the value of the first byte,
The value of i-th byte subtracts n and the value of jth byte subtracts 2n, have in these three values two or three it is equal, i.e., using equal value as
Type identification.Specifically, in type identification I, type identification II -5 and type identification III -10 two or more equal values whether
For 0x01,0x02 or 0x03.
Above embodiments are used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or modification, therefore all equivalent
Technical solution also should belong to scope of the invention, should be limited by each claim.
Claims (3)
1. the kind identification method of block in a kind of flash memory, which is characterized in that by least the two of the first page spare area of operating block
Type identification is written in a byte, after solution is out-of-order, the value of the byte of write-in type identification before checking, if there is two or two
It is above equal, i.e., using equal value as type identification.
2. the kind identification method of block in flash memory according to claim 1, which is characterized in that when write-in type identification, class
Type mark adds positive integer；When checking type identification, type identification positive integer added before subtracting.
3. the kind identification method of block in flash memory according to claim 1, which is characterized in that including：
Type identification, type identification+n are being respectively written by the first of the first page spare area of operating block, ith and jth byte
And type identification+2n；Wherein, two different positive integers that i, j are non-1；N is positive integer；
Memory is written in the data random ordering of entire block；
Data are read after solution random ordering；
It checks by the first of the first page spare area of operating block, ith and jth byte, the value of the value of the first byte, the i-th byte
The value for subtracting n and jth byte subtracts 2n, have in these three values two or three it is equal, i.e., using equal value as type identification.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810794564.5A CN108897499A (en) | 2018-07-19 | 2018-07-19 | The kind identification method of block in a kind of flash memory |
| PCT/CN2018/105890 WO2020015131A1 (en) | 2018-07-19 | 2018-09-15 | Type identification method of block in flash memory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810794564.5A CN108897499A (en) | 2018-07-19 | 2018-07-19 | The kind identification method of block in a kind of flash memory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108897499A true CN108897499A (en) | 2018-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810794564.5A Pending CN108897499A (en) | 2018-07-19 | 2018-07-19 | The kind identification method of block in a kind of flash memory |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108897499A (en) |
| WO (1) | WO2020015131A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11397635B2 (en) * | 2019-12-09 | 2022-07-26 | Sandisk Technologies Llc | Block quality classification at testing for non-volatile memory, and multiple bad block flags for product diversity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556560A (en) * | 2008-04-09 | 2009-10-14 | 群联电子股份有限公司 | Storage device, controller and data access method thereof |
| CN102693760A (en) * | 2011-03-24 | 2012-09-26 | 扬智科技股份有限公司 | Error correction method for NAND flash memory |
| CN104216791A (en) * | 2013-05-30 | 2014-12-17 | 上海斐讯数据通信技术有限公司 | Flash stored data verifying method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO315959B1 (en) * | 2002-04-16 | 2003-11-17 | Thin Film Electronics Asa | Procedures for storing data in a non-volatile memory |
| KR101274181B1 (en) * | 2006-02-13 | 2013-06-14 | 삼성전자주식회사 | Apparatus and method for managing flash memory |
| CN104391804B (en) * | 2014-10-28 | 2017-11-28 | 陕西千山航空电子有限责任公司 | A kind of NAND flash data storage methods |
| CN105718206B (en) * | 2014-12-03 | 2018-08-03 | 中国人民解放军国防科学技术大学 | The flash translation layer (FTL) and its implementation of RAID can be perceived |
-
2018
- 2018-07-19 CN CN201810794564.5A patent/CN108897499A/en active Pending
- 2018-09-15 WO PCT/CN2018/105890 patent/WO2020015131A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556560A (en) * | 2008-04-09 | 2009-10-14 | 群联电子股份有限公司 | Storage device, controller and data access method thereof |
| CN102693760A (en) * | 2011-03-24 | 2012-09-26 | 扬智科技股份有限公司 | Error correction method for NAND flash memory |
| CN104216791A (en) * | 2013-05-30 | 2014-12-17 | 上海斐讯数据通信技术有限公司 | Flash stored data verifying method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020015131A1 (en) | 2020-01-23 |
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Application publication date: 20181127 |
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