114 results about "Wear leveling" patented technology

The invention relates to the technical field of storage, in particular to an SSD wear leveling method and device based on dynamic data migration and a medium. The method comprises the following steps: monitoring access frequency, recording read-write times of a logic block in real time, and identifying hotspot data; tracking a wear state, counting the erasure times of the physical flash memory block, and evaluating the wear degree of the physical flash memory block; data migration decision: determining whether to migrate data based on the access frequency and the wear frequency; preferentially migrating data with high access frequency and high wear degree according to access frequency and wear program sorting; and data migration execution: migrating the hotspot data from the high-wear area to the low-wear area, and updating the mapping relation. According to the method, the data storage position can be intelligently adjusted according to the real-time data access characteristics and the abrasion state, and therefore the service life of the SSD is more efficiently prolonged.

The invention relates to the technical field of embedded data storage, and discloses a method and a system for prolonging the service life of a FLASH simulation EEPROM (Electrically Erasable Programmable Read-Only Memory) in a single chip microcomputer, and the method comprises the following steps: firstly, initializing the FLASH, dividing the FLASH into a main data area, a mapping table area, a backup area and a transaction log area, selecting a physical block through a dynamic wear leveling algorithm when data is written, and writing the data into a database; the method comprises the following steps of: starting a backup area or a transaction log area, safely updating a mapping table by using a transaction mechanism, performing cyclic redundancy check when reading data, if the cyclic redundancy check fails, starting cascade recovery from the backup area or the transaction log area, and finally, updating a transaction log to record operation so as to form a closed-loop management process. According to the invention, through a set of dynamic wear leveling and data classification management mechanism, global and uniform distribution of the write load in the storage array is realized, the physical block with the least erasing times is selected during writing, the access frequency of the data can be identified, and cold data which is not changed frequently can be actively migrated.

The invention belongs to the technical field of storage media, and particularly relates to a storage medium abrasion balancing system based on cold and hot data perception, which comprises a cold and hot data perception module used for monitoring the access frequency and the update time of data in real time so as to judge the cold and hot degree of the data, and establishing a heat table, recording a heat value of each data block or data page; and the data feature prediction module is used for predicting features of a future heat change trend and a data volume increase trend of the data by utilizing a machine learning algorithm according to historical data access and update records. According to the method, the hot and cold data sensing module is used for monitoring data access and updating conditions in real time to calculate a hot value, and the storage medium management module is combined to preferentially store hot data into blocks with less erasing times and store cold data into blocks with more erasing times. Therefore, the erasing times of the blocks of the storage medium tend to be balanced, and excessive abrasion of individual blocks is avoided.

The invention relates to the technical field of data storage optimization, and discloses a solid state disk wear leveling global optimization method and system based on multi-granularity data features. The solid state disk wear leveling global optimization method specifically comprises the following steps that S101, lightweight data feature monitoring points with blocks, units and chips as basic granularity are deployed in a solid state disk controller, and original multi-dimensional data features related to wear are continuously collected and quantified in real time, all collected multi-dimensional data features are converted into dimensionless feature scores which can be transversely compared through normalization processing. According to the method, multi-dimensional feature fusion and normalization processing of three-level granularity of blocks, units and chips of a fixed hard disk are utilized, a prediction model based on a time sequence is combined, a dynamic risk thermodynamic diagram covering the whole disk is generated, a system can accurately position current and future potential abrasion hot spots, and the system reliability is improved. And passive equalization operation is converted into active risk prevention.

The invention discloses an SSD B + tree indexing method and system based on wear leveling, and relates to the technical field of database indexing structure optimizing.The method comprises the steps that B + tree logic nodes and SSD physical addresses are decoupled, and a dynamic node mapping table is introduced; replacing local updating with additional updating, and writing the new version of the node into a new position of the SSD; when a write-in address is allocated to the node, an allocation strategy considering a block wear state is adopted, and write operation is guided to an area with relatively light wear; during garbage collection, high-wear blocks are preferentially treated to integrate wear. According to the method, the problems of writing hot spots and unbalanced abrasion of the B + tree on the SSD are effectively solved on the database software level, the service life of the SSD can be remarkably prolonged while the high performance of the B + tree is kept, and the method has very high universality and practical value.

Techniques are directed to wear leveling. Such techniques involve: determining, at least based on the type information of each redundant array of independent disks (RAID) group in a plurality of RAID groups, the write loss of each of the RAID groups. Such techniques further involve: determining the wear status of each of the RAID groups according to the status information and write loss of each of the RAID groups. Such techniques further involve: transferring at least a portion of data and / or a write task of a first RAID group to a second RAID group based on the write loss and the wear status of each of the RAID groups. With such wear leveling techniques, wear caused by write tasks can be evenly distributed among the RAID groups, so that the degree of wear among the RAID groups is more leveled.

Systems, methods and apparatus of intelligent wear-leveling with reduced write-amplification for data storage devices configured on autonomous vehicles. For example, a data storage device of a vehicle includes: storage media components; a controller configured to store data into and retrieve data from the storage media components according to commands received in the data storage device; an address map configured to map between: logical addresses specified in the commands received in the data storage device, and physical addresses of memory cells in the storage media components; and an artificial neural network configured to receive, as input and as a function of time, operating parameters indicative a data access pattern, and generate, based on the input, a prediction to determine an optimized operation for wear leveling among memory cells in the data storage device. The controller is configured to perform the optimized operation for wear leveling based on the prediction.

The invention relates to the technical field of intelligent chips, in particular to an NAND wear leveling method based on integrated circuit ECC (error correction code) and read delay, which comprises the following steps: acquiring read delay data and error correction code usage amount of a three-layer unit page of a target block in an NAND flash memory chip; on the basis of the read delay increment and the error correction code increment of the middle-layer page, the health index of the target block is calculated by combining the read delay difference value of the middle-layer page and the lower-layer page, the target block is divided into a plurality of health levels, and logic blocks of different health levels are mapped to different physical planes of the NAND flash memory chip; synchronously executing data migration and erasure operations of the plurality of blocks to be migrated by utilizing the parallel erasure capability of the multi-plane architecture for the target block of which the health level is degraded to a preset threshold value; and monitoring the deviation degree between the current read delay and the specification read delay in real time, and selecting the error correction strength grade of the error correction code according to the deviation degree.

The invention relates to a solid state disk dynamic wear balancing method and system based on data popularity, and the method comprises the steps: tracking the access characteristics of each data page in a solid state disk through a page-level counter, and enabling the access characteristics to comprise the write operation frequency, the modification period and the survival time; the data pages are dynamically divided into high-heat data, medium-heat data or cold data based on a preset threshold value, and corresponding heat layering labels are marked; collecting accumulated writing times and I / O request queue length of each channel of the solid state disk in real time, and calculating wear imbalance degree and load imbalance degree; performing data exchange according to a preset exchange mode priority based on the popularity hierarchical label, the wear imbalance degree and the load imbalance degree; and updating the logic mapping table and the channel state parameters, carrying out statistics on the balance income and the system overhead, and dynamically correcting the tolerance coefficient based on the current load type according to the income-overhead ratio.

The invention provides a solid state disk wear leveling method and device, electronic equipment and a storage medium, and relates to the technical field of computers. The method comprises the steps of determining a target recovery group corresponding to target data in a solid state disk SSD based on type characteristics of the target data; based on the cold and hot characteristics of the target data, writing the target data into a target data block corresponding to the cold and hot characteristics in the target recovery group; in response to the fact that the effective data proportion in the recycling unit is lower than a first threshold value, executing a first garbage recycling strategy; the first garbage recycling strategy recycles invalid data in the recycling group corresponding to the recycling unit; in response to the fact that the effective data proportion in the recycling unit is not lower than the first threshold value, executing a second garbage recycling strategy; the second garbage recycling strategy is used for recycling data in different data blocks in the recycling unit based on the wear degrees of the different data blocks in the recycling unit. Therefore, the response speed and recovery efficiency of the SSD can be improved, and the service life of the SSD is prolonged.

The invention relates to the technical field of solid state disks, in particular to a solid state disk intelligent read-write optimization method based on artificial intelligence, comprising an intelligent read-write scheduler, adaptive wear leveling, read-write performance optimization, fault prediction and health management, and safety protection and efficiency improvement. The use mode is analyzed through a machine learning algorithm, the cache strategy is optimized, fault prediction is carried out, the read-write performance and the data safety are improved, the read-write speed, stability and safety of the solid state disk can be remarkably improved, the requirements of diversified application scenes are met, faults are predicted, and the phenomenon that the solid state disk breaks down is avoided; through intelligent read-write optimization driven by artificial intelligence, the SSD can realize collaborative optimization of performance, service life and energy efficiency under a complex load, a high-reliability storage solution is provided for scenes such as a data center and edge computing, and the performance, service life and energy efficiency of the SSD can be improved by combining machine learning, reinforcement learning and a hardware collaborative technology.

The invention discloses a flash memory management method and a flash memory management device capable of balancing wear degree, and relates to the technical field of storage. According to the flash memory management method capable of balancing wear degree, blocks of different wear degree hierarchies are forced to be uniformly mixed and distributed to each region based on a hierarchical polling partitioning strategy, so that the wear degree is balanced; the abrasion degrees between the areas and in the areas are effectively promoted to approach to an equilibrium state, and the situation that local blocks fail in advance due to excessive abrasion is avoided; a double-layer erasure cycle sequence table is established for erasure operation of the flash memory, ascending sorting is performed according to the actual wear degree of each block, and the blocks with low wear degree are erased preferentially, so that global wear balance of the flash memory is synchronously realized while the complexity and the frequency of sorting calculation are reduced, the service life of the flash memory can be remarkably prolonged, and the service life of the flash memory is prolonged. And the calculation load and resource consumption of the system can be greatly reduced.

Techniques for wear leveling involve identifying a detected disk as a target disk in response to detecting the disk with a degree of wear greater than a first threshold in a plurality of disks of a storage array. Such techniques further involve determining, in response to the number of the target disks being greater than or equal to a second threshold, an updated weight for disk wear based on the degree of wear of the target disk and an impact attenuation factor associated with the degree of wear. Such techniques further involve performing, based on the updated weight for the disk wear, wear leveling for an input / output (IO) request on the plurality of disks in the storage array. In this way, it can effectively avoid deterioration of the storage performance caused by end of life (EOL) of too many disks at the same time point or cycle.

This disclosure provides for host-controller cooperation in managing NAND flash memory. The controller maintains information for each erase unit which tracks memory usage. This information assists the host in making decisions about specific operations, for example, initiating garbage collection, space reclamation, wear leveling or other operations. For example, metadata can be provided to the host identifying whether each page of an erase unit has been released, and the host can specifically then command each of consolidation and erase using direct addressing. By redefining host-controller responsibilities in this manner, much of the overhead association with FTL functions can be substantially removed from the memory controller, with the host directly specifying physical addresses. This reduces performance unpredictability and overhead, thereby facilitating integration of solid state drives (SSDs) with other forms of storage. The disclosed techniques are especially useful for direct-attached and / or network-attached storage.

Mechanisms for controlling background wear leveling are provided, including: increasing a first counter; comparing the first counter to a first threshold; and in response to the first counter meeting the first threshold: decreasing the first counter by a value of the first threshold; and triggering background wear leveling. In some embodiments, the first counter is increased in response to receiving a write trigger. In some embodiments, the first threshold is based upon a page size and a number of planes of physical media of an SSD. In some embodiments, the mechanisms further comprise: incrementing a second counter in response to receiving a host write trigger; comparing the second counter to a second threshold; and in response to the second counter meeting the second threshold, decreasing the second counter by the second threshold, wherein the increasing the first counter is performed in response to the second counter meeting the second threshold.

The application provides a super block management method and device and electronic equipment, comprising: obtaining a target storage block in a storage unit in a plurality of NandFlash; the block number of the target storage block is the same; initializing a minimum heap container; constructing a super block according to the target storage block; writing a first data structure of a first sub-super block in the super block in a full data state into a first minimum heap in the minimum heap container; and writing a second data structure of a second sub-super block in the super block in an unwritten data state into a second minimum heap in the minimum heap container; and managing the write operation and the garbage collection operation of the super block through the first minimum heap and the second minimum heap. The method improves the garbage collection and wear leveling algorithm efficiency of the SSD firmware.

This invention provides a wear leveling method and a memory storage device. The wear leveling method is used in a rewritable non-volatile memory module. The rewritable non-volatile memory module includes multiple physical erase units. The wear leveling method includes: determining whether each of the multiple physical erase units meets a preset condition based on the number of erases and the write time of each of the multiple physical erase units; if there is a current physical erase unit that meets the preset condition, determining whether the current physical erase unit is full; if the current physical erase unit is not full, performing a first wear leveling operation on the current physical erase unit; if the current physical erase unit is full, performing a second wear leveling operation on the current physical erase unit.

The invention relates to the technical field of satellite-borne computer file management, and discloses a management and maintenance method and system for NAND FLASH files on a satellite-borne computer, and the method comprises the steps: carrying out file-level read-write management on NAND FLASH through a Yaffs2 file system, and realizing transparent distribution of storage space based on a dynamic logic-physical address mapping table; uniformly distributing data writing operation to a plurality of physical sectors of the NAND FLASH by adopting a wear leveling algorithm, and controlling unevenness and wear of the sectors of the NAND FLASH; according to the method, factory bad blocks and bad blocks generated in the using process are recognized and marked, the bad blocks are dynamically replaced through redundant blocks, meanwhile, the mapping relation between logic addresses and physical addresses is updated, and the reliability of file data stored on the NAND FLASH is improved. Through an innovative wear leveling strategy, a delay bad block marking mechanism, a dynamic address mapping table design and high collaboration with a Yaffs2 file system, the aspects of prolonging the service life of a storage medium, guaranteeing data reliability, optimizing system performance and the like are remarkably improved.

The present invention belongs to the field of computer storage, and specifically relates to a ZNS SSD wear leveling method based on an LSM tree. The method comprises the following steps: inputting new data into a ZNS SSD, and classifying the heat level of the new data by using an LSM tree data heat classification method before input; dividing the ZNS SSD into multiple erase range intervals by using an erase range interval selection method, and determining the corresponding erase range interval according to the heat level of the new data; selecting an idle zone within the erase range interval corresponding to the new data to store the new data; and if no idle zone exists within the erase range interval, allocating an idle zone to the new data by using a wear-aware zone allocation method to further balance the wear between zones. The present invention balances the wear between zones in a ZNS SSD, effectively prolongs the service life of ZNS SSDs, and has low overhead.

A data storage system may include a memory device and a controller. The memory device may include a plurality of virtual blocks. The controller may include at least one processor and a memory. The memory may include instructions stored thereon, that when executed by the at least one processor, cause the at least one processor to: monitor a number of program / erase cycles for the plurality of virtual blocks; collect read errors for the plurality of virtual blocks; select a virtual block of the plurality of virtual blocks to open based on the number of program / erase cycles and the collected read errors; and write data to the selected open virtual block.

The invention discloses a door lock operation log management method applied to an intelligent door lock and the intelligent door lock. The door lock operation log management method comprises the following steps: receiving a door lock operation log plaintext, and converting the door lock operation log plaintext into coded log data in a preset format; determining an active sector in the plurality of storage sectors, and writing the coding log data into a current to-be-written address of the active sector; updating metadata of the active sector after writing, wherein the metadata at least comprises a next to-be-written address, the number of logs of the current sector and sector state information; and judging whether the active sector is fully written or not, and when the active sector is fully written, selecting a next storage sector from the plurality of storage sectors for erasing, and setting the next storage sector as a new active sector, so as to realize cyclic coverage and wear balance of the sectors. According to the invention, through log coding compression and sector rotation management, the space occupied by the log is reduced, and the FLASH utilization rate is improved; and wear balance is realized through cyclic coverage.

The application discloses a kind of support in-orbit program reconfiguration's satellite-borne solid-state memory, belong to electronic information field.Satellite-borne solid-state memory includes control core, data storage array, cache unit, refresh loading circuit, interface unit, program storage unit, control core realizes the control of storage array, parse host computer instruction, bad block management, wear leveling and address management, cache unit effectively prevents single event upset error.Storage array avoids the timing violation of FPGA that can appear under high main frequency and other difficult problems.Load refresh circuit uses refresh loading circuit to refresh FPGA internal program regularly, reduces the influence of single event upset.Interface unit realizes the control management of host computer to satellite-borne solid-state memory.Program storage unit selects storage carrier according to function, storage capacity size, read-write bandwidth requirement.The whole hardware design is with FPGA soft core to realize the control management function of satellite-borne solid-state memory, and special CPU hardware does not have to be designed.

The application relates to a wear leveling method suitable for NorFlash data storage, including a memory storage page allocation method, an initialization method and data writing and reading methods. The memory storage page allocation method is as follows: two storage pages are divided from a storage space; the initialization method includes: selecting one storage page as an active page and the other as a standby page, and updating the value of a global variable in the memory; the data writing method includes: judging whether the remaining storage space of the active page is not less than the space required by the data to be written; if yes, the data to be stored is written from a data offset address; if not, the standby page is switched to the active page, and the active page is written again; the data reading method is as follows: relevant parameters of the data to be read are acquired, data in the active page is searched from back to front, and the data first searched and meeting the relevant parameter requirements is read into the memory. The application also relates to a storage device and is used for executing the above method.

Methods, systems, and devices for sacrificial block pool are described. For instance, a memory device may allocate a first pool of blocks and a second pool of blocks. The first pool of blocks may be associated with access operations in which each memory cell stores a single bit and the second pool of blocks may be associated with operations where each memory cell stores a single bit or multiple bits. The memory device may perform access operations according to the allocation, where for the access operations a first wear-leveling criteria is applied to a first subset of the second pool of blocks and a second wear-leveling criteria is applied to a second subset of the second pool of blocks. The memory device may move a block of the second subset to the first pool of blocks based on an amount of access operations associated with the block satisfying a threshold.

Provided are a solid-state drive and a wear leveling method. The solid-state drive includes a plurality of zones, a mapping relationship and an SSD controller. The SSD controller is configured to: determine, according to the mapping relationship, an identifier of a first target zone corresponding to an identifier of a to-be-written zone in response to receiving a data write command from a host drive unit, and write the to-be-written data to the first target zone. The data write command carries the identifier of the to-be-written zone determined by the host drive unit and to-be-written data, the mapping relationship includes an identifier of an alternate zone corresponding to an identifier of each of the plurality of zones, and the alternate zone of each zone is a zone, determined from the plurality of zones, with fewest programmed / erased cycles.

This disclosure provides for improvements in managing multi-drive, multi-die or multi-plane NAND flash memory. In one embodiment, the host directly assigns physical addresses and performs logical-to-physical address translation in a manner that reduces or eliminates the need for a memory controller to handle these functions, and initiates functions such as wear leveling in a manner that avoids competition with host data accesses. A memory controller optionally educates the host on array composition, capabilities and addressing restrictions. Host software can therefore interleave write and read requests across dies in a manner unencumbered by memory controller address translation. For multi-plane designs, the host writes related data in a manner consistent with multi-plane device addressing limitations. The host is therefore able to “plan ahead” in a manner supporting host issuance of true multi-plane read commands.

Systems, methods, and apparatus are provided for wear leveling repair in memory devices. A host is configured to issue a wear leveling command and a repair request to a memory device, the memory device being configured to check whether source data in a memory of the memory device has an error in response to receiving the wear leveling command from the host, source data in the memory of the memory device is transferred to a target page, and if the source data contains an error, a source page is repaired. The memory device is further configured to set a new repair match if a wear-leveling repair element is not depleted after receiving the repair request, and to set a new repair match if the wear-leveling repair element has been depleted and a physical address of an incoming repair request is associated with the wear-leveling repair element. A previous repair match is refreshed prior to setting the new repair match.

The application discloses a kind of hardware supplement method, system and circuit of space data processing and knowledge management system, belong to spaceborne data processing technical field, for solving existing spaceborne data processing relies on central processing unit and software architecture, it is easy to be affected by space single particle effect, space radiation interference and appear operation exception, real-time and reliability insufficient problem.The core method of the application includes: reading cache knowledge according to time decay calculation current confidence;Data packet hop count or survival time is directly discarded when exceeding limit;After inter-satellite link interruption recovers, master artificial intelligence node is elected according to preset rule and conflict is judged;When cache is written, it is accumulated to the minimum writing unit after being written once, and wear leveling is triggered according to the number of erasing and writing.The whole process of the application is automatically executed by pure hardware circuit, without central processing unit, without instruction execution, without software code running, with the characteristics of anti-radiation, high real-time, high reliability, can be adapted to space on-orbit environment.

A computer-implemented method of operating a counter is described, the method comprising: i) performing a counting operation, where the counting operation is performed in a bitwise manner, in particular using Gray codes; ii) segmenting the counting operation using wear leveling; and iii) performing an error correction scheme for the count operation using majority voting.