126results about How to "Reduce the number of wipes" patented technology

This invention discloses a flash file system management method, which comprises the following steps: to divide the flash memory into FAT area and data memory area; to establish the space mapping form and to write the data block of each file into the block; to write the new file ID, block number, file researching number into the record; then to orderly write each data block into the spare block and to write each data block number into relative positions of the space mapping form; only to operate the file data memory area when updating file data; to identify the place of the data to be read when reading the data for searching the data block.

The invention relates to the technical field of semiconductor memory and provides a flash memory device and a management system and a method thereof. The method realizes the management of the flash memory device based on a memory medium and a cache memory unit, and comprises the following steps of: A. establishing mapping relationship between the memory medium and at least one cache memory unit; and B. caching data to be accessed in the memory medium to the cache memory unit based on the mapping relationship, and accessing the cache memory unit based on the mapping relationship. By using the flash memory device and the management system and the method thereof, the service life of the flash memory device can be prolonged.

The invention provides a method for erasing and writing data of a FLASH memory, comprising the following steps of: when data are required to be written into a sector, firstly judging whether a free space of the sector is sufficient to store the data to be written, and if the free space of the sector is sufficient, writing the data into the lowest address of the free space of the sector directly; if the free space of the sector is insufficient, erasing the sector and then writing the data into the lowest address of the sector; and recording the start and end address information of the written data after the data are completely written, and updating effective data address information to be taken as a word address of the written data. In the method, the data are written into the sector in sequence, the word address of the data which are written at last is taken as an effective data word address, and the whole sector is erased and the data are written into the sector from the initial position of the sector when the free space of the sector is insufficient, thus erasing frequency of the sector is obviously reduced, efficiency is improved, and service life of the FLASH memory is prolonged.

The invention discloses a method for selecting a garbage collection target block, and a solid state disk. The method is characterized in that the recovery factor score of each block is calculated according to the proportion and the erasing frequencies of effective pages in each block, and the block with a lowest score is selected as a recovery target block. The effective page ratio and the erasingfrequency weighting score value of each block on the SSD (Solid State Disk) are calculated to comprehensively consider an influence on the read-write performance and the service life of the SSD as far as possible, and the block with a low effective page proportion and few erasing frequencies is selected as the target recovery block of a GC. A wear-leveling thought is used for selecting an optimalblock as a recovery block, block erasing frequencies in the SSD are reduced, data migration frequencies are lowered, write amplification is reduced, and the service life of the SSD is improved.

The method includes forced reclaiming step carried out in time of writing sector, and conditional reclaiming step carried out after time of deleting sector. The forced reclaiming step reclaims blocks with most dirty sectors. Conditional reclaiming step is divided into two situations: for reclaiming blocks with number of dirty sectors being reached to a threshold value of dirty sectors; for reclaiming blocks with minimal erasure number. Advantages are: as far as possible to reduce number for erasing blocks, even erasure to make all physical blocks have even service life.

The method relates to a method for storing configuration parameters in a NOR FLASH based on a Hash algorithm. The method comprises the following steps: configuration parameter items are sequentially written in a blank area of a configuration parameters partition without adding tags in a format 'name=value', effective configuration parameters are obtained by a positional relation of the blank area in FLASH after a Hash table is established for the configuration parameters, the Hash table is used for representing mapping between effective configuration information of the partition in a configuration parameters space and memory omission, when certain parameter needs modification, similarly, the Hash algorithm is firstly carried out, then corresponding nodes in the Hash table are compared, and then a decision is made on whether the configuration parameter needs modification and whether the configuration parameter need to be written in the FLASH. The method can effectively lower the reading and writing of the FLASH, and especially the erasing times of the FLASH, and improves the inquiry speed and the modification speed of the configuration parameters.

The invention discloses a method for storing user information of a set top box. A plurality of blocks of FLASH is partitioned, and the partitioned areas are divided into a plurality of storage units; the capacity of each storage area is not smaller than a preset user information amount, so as to guarantee that data can be continuously written in until a complete storage area is filled with the data; and one-time erasure operation is performed on a previous storage area after the data are successfully written in the next storage area, accordingly, the times for erasing the FLASH are reduced, the data can be erased after the data are successfully written in, and a traditional operation method of firstly erasure and later writing-in is avoided, so that the problem of data loss in the storage process is solved, and the reliability in the whole data storage process is improved; and besides, the FLASH is utilized for simulating an E2PROM (electrically erasable programmable read-only memory) for data storage, so that an E2PROM device is omitted, and the hardware cost is reduced.

The invention provides a NandFlash address mapping and a block management algorithm. The NandFlash address mapping and the block management algorithm are a part of the firmware design of a solid-statedisc controller, and mainly play the following roles: 1, the address information taking a sector as a unit sent by a mainframe is translated into a physical block and a page address of a NandFlash chip; 2, each block of the NandFlash chip is used as evenly as possible through the block management algorithm, the usage rate of each block is improved, the unnecessary erasure operations are avoided,the number of times of the block erased is reduced, which is commonly known as load balancing; 3, the bad blocks are managed in the using process to ensure the reliability of data; 4, optimized NandFlash multi-channel address mapping design is adopted to realize multi-channel parallel/pipeline operations.

The invention discloses a method for writing data by an NAND FLASH. The NAND FLASH comprises physical blocks; physical blocks are mapped to logic blocks one to one; each logic block comprises a mapping table and a free chain table; the method comprises the following steps of determining a to-be-written first logic block; acquiring the physical blocks of which the erase times are fewest from the free chain tables to serve as first physical blocks; judging whether the first physical blocks are bad blocks or not, and if the first physical blocks are the bad blocks, marking the current first physical blocks as the bad blocks, and replacing the first physical block; writing to-be-written data in the first physical blocks; recording mapping to the first physical blocks from first logic blocks in the mapping tables. According to the method disclosed by the invention, by utilizing the free chain tables, wear leveling is realized; the bad blocks discovered in write operation are mapped to a bad block space, and the physical blocks of which the erase times are fewest are reacquired from the free chain tables to perform the write operation so as to combine bad block management with the wear leveling.

The invention discloses a method for storing data in a Flash memory, including the following steps: a, an entire Flash storage space is divided into a plurality of logical partitions used for storing at least one type of data log, and each logical partition comprises one or more continuous physical blocks; b, the storage space occupied by each item of the data log is used as a virtual sector, and each virtual sector is provided with a virtual sector distribution sheet which is used for describing the attribute of the data log; and c, the virtual sector distribution sheet and the data log which corresponds to the virtual sector distribution sheet are sequentially written into the physical blocks of the logical partitions. By utilizing the method for storing data in the Flash memory, the technical problem of the low utility ratio of the Flash storage space, which is caused by the existing method, can be effectively solved.

The invention discloses a repeated data deleting method and device, and improves system reliability of a mobile intelligent terminal. The method comprises the steps of: carrying out matching on a data fingerprint of a current data block and data fingerprints in a hotspot hash table, and if a matching result is that the data fingerprint of the current data block is consistent with one data fingerprint in the hotspot hash table, determining the current data block as repeated data; and if a matching result is that the data fingerprint of the current data block is inconsistent with the data fingerprints in the hotspot hash table, carrying out matching on the data fingerprint of the current data block and data fingerprints in a hash fingerprint table, and when a matching result is that the data fingerprint of the current data block is consistent with one data fingerprint in the hash fingerprint table, determining the current data block as the repeated data, wherein the data fingerprint of each harsh table item in the hotspot hash table is a data fingerprint of which repeated times in at least one file reach a set threshold value, and the data fingerprints of the hash fingerprint table are stored data fingerprints of all the data blocks.

The invention discloses a page-level buffer improvement method based on a classification strategy. The method comprises a request type distinguishing module, a hot data page storage area module, a cold data page storage area module and a continuous data page storage area module. The method comprises the following steps: firstly, dividing a hot data page cache into the hot data page storage area module, the cold data page storage area module and the continuous data page storage area module, and separately using the modules to load data pages of a request with frequent accesses, the data pages of a request with lower access frequency and the data pages of the request with high spatial locality; secondly, arriving at the continuous data page storage area module by prefetching multiple continuous data pages; and finally, when the data page cache is full, preferably replacing least recently used (LRU) clean pages in the cold data page storage area module, and if the cold data page storage area module does not have dirty pages, replacing the dirty pages. Compared with a page-level LRU algorithm, by adopting the page-level buffer improvement method disclosed by the invention, the responseperformance to continuous loads can be improved, and the read and write overheads of flash memories can be effectively reduced.

The invention discloses a buffer improvement method oriented to s page-level FTL (Flash translation layer). The buffer improvement method comprises the following steps that: 1: dividing an RAM (Random Access memory) into a request type distinguishing module, a random request processing area module and a continuous request processing area module; 2: judging a type which achieves the request by the request type distinguishing module, and processing by the corresponding request processing area module; 3: if the data page of the request is in the RAM, immediately obtaining service, during service, judging the read-write type of the request, if the request is a write request, carrying out data coverage in the buffer, and otherwise, directly reading data from the buffer; 4: when a data page in the continuous request processing module is subjected to secondary access, loading the data page into the random request processing module; and 5: when the random request processing area module is full, according an LRU (Least Recently Used) strategy, carrying out ejection by taking a cluster as a unit, and when the continuous request processing area module is full, according to an FIFO (First In First Out) strategy, carrying out ejection by taking the cluster as the unit. The method is high in practicality and has a good application prospect.

The invention is suitable for the technical field of computers, and provides a method for weighting wear balance of a solid state disk. The method comprises the steps as follows: recording at least one bad block of the solid state disk and a block number around the bad block; generating a hash table according to the block number around the bad block; and when the solid state disk is subjected to wear balance, weighting a wear balance coefficient of the block in the hash table. Correspondingly, the invention further provides a wear balance system for realizing the method. Therefore, the performance of the solid state disk can be improved and the service life of the solid state disk can be prolonged.

The invention relates to a method for drying automobile glass printing ink, which comprises the following steps: carbon midwave tubes and common midwave tubes are arranged in an printing ink drying machine, and heating zone of the drying machine is divided into a plurality of regions; after finishing printing, the glass flows into the drying machine through the production line and passes through a baking zone, and heat of the heating pipe pair is radiated onto the ink, so that the glass is quickly heated and the moisture is evaporated; and when the glass passes through the baking zone, the surface temperature can falls quickly, thereby achieving the design requirement. Compared with the prior art, the invention has the advantages of high output, low labor intensity, low investment and the like.

The driving method of flash memory device includes the following steps: defining blocks of the data to be written based on the size of FLASH; reading out and storing the data in the corresponding FLASH blocks; comparing the stored data in the corresponding position and the data to be written and judging whether no change from 0 to 1 in all the bits of the blocks; if so, writing the data needing writing into the corresponding positions in the blocks directly, or if not, scrubbing the blocks to be scrubbed after data protection and writing the data needing writing into the corresponding positions. For the data writing in the case of great data amount and less modification and the data writing in the case of small data amount and multiple times of writing, the present invention can raise the FLASH writing speed and prolong the service life of FLASH obviously.

The invention discloses a preparation method of wear-resistant decorative paper, comprising the following steps, S1: heating, stirring and fully mixing 50-100 parts of alumina powder, 500-1500 parts of deionized water, 1-3 parts of a dispersing agent, 10-20 parts of silica nanoparticles, 10-20 parts of titanium dioxide nanoparticles, 60-120 parts of polyurethane, 100-200 parts of acrylic resin, 5-7 parts of a cross-linking agent and 2-5 parts of a penetrant, and then cooling the mixture to form glue; S2: dipping printing paper into the glue, and then drying the glue on the surfaces of the printing paper. By coating the surfaces of the printing paper with mixture coatings of the alumina powder, the silica nanoparticles and the titanium dioxide nanoparticles, the mixture coatings are wear-resistant, hydrophobic and oleophobic, increase the wear resistance of the decorative paper so that the decorative paper is less prone to wear, and increase dust resistance of the decorative paper itself to reduce the number of times of wiping and to prolong the service lifetime of the decorative paper.

The embodiment of the invention discloses a method and device for writing data in a memory chip. According to the method and device, whether enough space for writing of new data exists or not is judged, if yes, the new data are directly written in, and if not, an erasing operation is carried out. Therefore, the frequency of writing operations and the frequency of erasing operations in the Flash memory chip are further reduced, and the service life of the Flash memory chip is greatly prolonged. The method comprises the steps of (1) judging whether enough space for writing of first data exists or not , if yes, executing the step (2), if not, executing the step (3), (2) writing the first data in a first idle memory area, and (3) erasing all the memory areas, and writing the first data in the corresponding memory area.

This invention relates to an electronic device containing control programs and discloses a starting up method for the device, which designs multiple tuples and fetches the program available marks written when starting up last time from the last written position, if the start up times exceed the threshold, then the programs are loaded again, otherwise the program available mark containing the counting information of this time is written in the next un-written position in the tuples, if the start up is successful, then the successful program available mark is written in the first position of the next tuple, if the preset sets are full or the program is re-loaded, then the written ones are erased.

The invention provides a method and device for a write operation and an erasure operation of a Flash memory. The method for the write operation of the Flash memory comprises the steps that a write operation instruction for the Flash memory is received; a virtual address contained in the write operation instruction is acquired; an actual address in the Flash memory, which is corresponding to the virtual address, is acquired according to a mapping relation between preset virtual addresses and actual addresses; a page in the Flash memory has a matrix structure composed of rows and lines; the actual address corresponding to one virtual address comprises multiple line addresses of the same row in the matrix structure; and to-be-written data is written into a blank address in the actual address, which is corresponding to the virtual address. The method and device for the write operation and the erasure operation have the advantages that erasure times of the Flash memory can be effectively reduced; and service life of the Flash memory can be prolonged.

The invention discloses a page-level FTL solid state disk performance optimization method based on correlation perception. In an SSD based on a flash memory, an FTL is adopted to redirect write content to an idle physical address, and a mapping table from a logic address to the physical address is managed, which seriously affects the performance of the SSD based on the flash memory. In order to improve the performance based on the flash SSD, I/O correlation in workloads is utilized, a related perception page level FTL technology is provided, and a related perception mapping table is designed and a correlation prediction table is constructed based on correlation of reading operation so as to support rapid searching of mapping entries in the related perception mapping table. Moreover, the read-write cache is split, and a skew-perceived dirty item index is constructed, so that the cache hit rate is increased, and the garbage collection overhead is reduced. According to the method, the page mapping efficiency can be remarkably improved, the read-write performance is improved, and the junk collection overhead is reduced by using the semantic link related perception page level FTL method.