CN108710580A - A kind of bad block management method promoting storage device active volume - Google Patents
A kind of bad block management method promoting storage device active volume Download PDFInfo
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- CN108710580A CN108710580A CN201810395368.0A CN201810395368A CN108710580A CN 108710580 A CN108710580 A CN 108710580A CN 201810395368 A CN201810395368 A CN 201810395368A CN 108710580 A CN108710580 A CN 108710580A
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- module unit
- block
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
- G06F12/023—Free address space management
- G06F12/0238—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory
- G06F12/0246—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory in block erasable memory, e.g. flash memory
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
The invention discloses a kind of bad block management methods promoting storage device active volume, the purpose of the present invention is with the concept of virtual plane, the number that good block was erased in the good block message and unit being denoted as in the module unit that can not be used using fuzzy theory record counts, and it is corresponded on the address of block using mapping table mode for when judging that bad number of blocks is less than sample rate via Fuzzy Optimal Control in the module unit that can not be used, and it can will completely gather out in a good module unit income to virtual plane, when read-write is to module unit in virtual plane, automatically the address mapping of bad block can be gone to the good block address prepared, effectively preserve the maximization of storage device use space, since the module unit in more several virtual planes shares the read-write number of each block, the service life of whole device can be effectively increased.
Description
Technical field
The present invention relates to bad block management technical field, specially a kind of bad block management side promoting storage device active volume
Method.
Background technology
Flash data access can be limited by the factor of data endurance, storage reliability and Dyslexia, in the life of memory
Ordering can be because prolonged access generates abnormal bad block in the period, therefore master component must be done for this characteristic at fine or not block
Reason mechanism, avoids data from causing mistake because of writing in bad block.Include 4 planes, Mei Geping inside the bare die of general flash memory
Face includes several pieces, and since storage device is under the high request of read performance, master component can be deposited using more plane modes of interlocking
It takes, the parallel read-write motion of homochronousness is exactly done with the corresponding solid block of 4 planes, 4 block groups are come as a module unit
Effectively management.The Bad Block Management mechanism of main control processor is exactly to manage the module unit in each bare die, is appointed when having in module unit
Mistake, which occurs, for what block to avoid firmware journey in use, this module unit can be denoted as the module unit that can not be used by master control
Sequence accidentally uses backward.This mechanism can effectively ensure that master control will will not be counted accidentally in a manner of interlocking by more planes when reading and writing data
According to writing in bad block.However this mode can cause a disadvantage, if only a quarter bad block in a module unit,
His 3/4ths blocks for being all will result in up to 3/4ths unnecessary storage spaces wastes, what is more if bad block
It occurs mostly in approximately the same plane, and when the corresponding block address of other planes is all available situation, entire flash memory is naked
The entity parking space of piece will be greatly decreased.
Invention content
It is above-mentioned to solve the purpose of the present invention is to provide a kind of bad block management method promoting storage device active volume
The problem of being proposed in background technology.
To achieve the above object, the present invention provides the following technical solutions：A kind of bad block promoting storage device active volume
Management method includes the following steps：
A, each entity bare die is cut into several module units as the basic unit of Bad Block Management by master component；
B, bad block occurs when master component such as erases as data, reads or be written to flash memory at the actions, at this time Bad Block Management mechanism
Module unit existing for this bad block can be denoted as using；
C, the defect block addresses that can not be used in module unit are indicated, and arrange the information for noting down all good blocks；
What the sequentially one-to-one image again of bad block present in D, being denoted as in the module unit that can not be used was recorded to step C
Number block address, when the bad block in module unit all can by image again to good block address when, change using this module unit as virtual plane
It is set as available module unit；
E, when master component receiving host order accesses the module unit to virtual plane；
F, by mapping table by the good block address in the defect block addresses image in virtual plane to other available module units；
G, it is confirmed whether newly-increased bad block and returns to main flow.
Preferably, master component forms a module unit with each block of 4 planes in the step A.
Compared with prior art, the beneficial effects of the invention are as follows：The purpose of the present invention is with the concept of virtual plane, utilize
The number that good block was erased in the good block message and unit that fuzzy theory record is denoted as in the module unit that can not be used is done
Statistics, and use image for when judging that bad number of blocks is less than sample rate via Fuzzy Optimal Control in the module unit that can not be used
Table mode has corresponded on the address of block, and can will completely gather out in a good module unit income to virtual plane, works as read-write
When module unit in virtual plane, the address mapping of bad block can be gone automatically to the good block address prepared, effectively preserve and store
The maximization of device use space, since the module unit in more several virtual planes shares the read-write number of each block, energy
It is effectively increased the service life of whole device.
Description of the drawings
Fig. 1 is bad block management schematic diagram of the present invention；
Fig. 2 is bad block management flow chart of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of bad block management promoting storage device active volume
Method includes the following steps：
A, master component forms a module unit with each block of 4 planes, and each entity bare die is cut into several module units
Basic unit as Bad Block Management；
B, bad block occurs when master component such as erases as data, reads or be written to flash memory at the actions, at this time Bad Block Management mechanism
Module unit existing for this bad block can be denoted as using；
C, the defect block addresses that can not be used in module unit are indicated, and arrange the information for noting down all good blocks；
What the sequentially one-to-one image again of bad block present in D, being denoted as in the module unit that can not be used was recorded to step C
Number block address, when the bad block in module unit all can by image again to good block address when, change using this module unit as virtual plane
It is set as available module unit；
E, when master component receiving host order accesses the module unit to virtual plane；
F, by mapping table by the good block address in the defect block addresses image in virtual plane to other available module units；
G, it is confirmed whether newly-increased bad block and returns to main flow.
In the present invention, still available block message in above-mentioned module unit is recorded by fuzzy theory, is judged each
The good block message of module unit simultaneously counts strange good block and erases number, is permitted to do well good good block and sequentially through threshold values through fuzzy optimization
Image is to the address of bad block, and bad block inside the module unit that can not entirely use is all on mapped to available piece
When, firmware program can become available module unit with the concept of virtual plane by the module unit that can not be used is labeled.
The purpose of the present invention is with the concept of virtual plane, the block list that can not be used is denoted as using fuzzy theory record
The number that good block was erased in good block message and unit in member counts, and interior via mould for the module unit that can not be used
Paste optimal control judges to have corresponded on the address of block using mapping table mode when bad number of blocks is less than sample rate, and can be complete
It gathers out in a good module unit income to virtual plane, it, can be automatically by bad block when read-write is to module unit in virtual plane
Address mapping gone to the good block address prepared, the maximization of storage device use space is effectively preserved, due to more several void
Module unit in quasi-plane shares the read-write number of each block, can be effectively increased the service life of whole device.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (2)
1. a kind of bad block management method promoting storage device active volume, it is characterised in that：Include the following steps：
A, each entity bare die is cut into several module units as the basic unit of Bad Block Management by master component；
B, bad block occurs when master component such as erases as data, reads or be written to flash memory at the actions, at this time Bad Block Management mechanism
Module unit existing for this bad block can be denoted as using；
C, the defect block addresses that can not be used in module unit are indicated, and arrange the information for noting down all good blocks；
What the sequentially one-to-one image again of bad block present in D, being denoted as in the module unit that can not be used was recorded to step C
Number block address, when the bad block in module unit all can by image again to good block address when, change using this module unit as virtual plane
It is set as available module unit；
E, when master component receiving host order accesses the module unit to virtual plane；
F, by mapping table by the good block address in the defect block addresses image in virtual plane to other available module units；
G, it is confirmed whether newly-increased bad block and returns to main flow.
2. a kind of bad block management method promoting storage device active volume according to claim 1, it is characterised in that：Institute
It states master component in step A and one module unit is formed with each block of 4 planes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395368.0A CN108710580A (en) | 2018-04-27 | 2018-04-27 | A kind of bad block management method promoting storage device active volume |
| PCT/CN2018/105859 WO2019205444A1 (en) | 2018-04-27 | 2018-09-14 | Bad block management method for increasing available capacity of storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395368.0A CN108710580A (en) | 2018-04-27 | 2018-04-27 | A kind of bad block management method promoting storage device active volume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108710580A true CN108710580A (en) | 2018-10-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810395368.0A Withdrawn CN108710580A (en) | 2018-04-27 | 2018-04-27 | A kind of bad block management method promoting storage device active volume |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108710580A (en) |
| WO (1) | WO2019205444A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578993A (en) * | 2019-09-27 | 2021-03-30 | 北京忆恒创源科技有限公司 | Method for processing programming error of multi-plane NVM and storage device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114968066A (en) * | 2021-02-19 | 2022-08-30 | 瑞昱半导体股份有限公司 | Method and apparatus for fault block management in flash memory |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520734C (en) * | 2005-11-18 | 2009-07-29 | 凌阳科技股份有限公司 | Control apparatus and method of flash memory |
| CN104360958A (en) * | 2014-12-09 | 2015-02-18 | 哈尔滨工业大学 | Bad block management system and bad block management method based on block reservation area replacement |
| CN109783017B (en) * | 2015-01-27 | 2021-05-18 | 华为技术有限公司 | Storage device bad block processing method and device and storage device |
| CN105843749B (en) * | 2016-03-24 | 2019-01-25 | 浙江大学 | A kind of NAND Flash fault-tolerance approach based on FPGA |
-
2018
- 2018-04-27 CN CN201810395368.0A patent/CN108710580A/en not_active Withdrawn
- 2018-09-14 WO PCT/CN2018/105859 patent/WO2019205444A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578993A (en) * | 2019-09-27 | 2021-03-30 | 北京忆恒创源科技有限公司 | Method for processing programming error of multi-plane NVM and storage device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019205444A1 (en) | 2019-10-31 |
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Application publication date: 20181026 |