Wear leveling (also written as wear levelling) is a technique[1] for prolonging the service life of some kinds of erasable computer storage media, such as flash memory, which is used in solid-state drives (SSDs) and USB flash drives, and phase-change memory. There are several wear leveling mechanisms that provide varying levels of longevity enhancement in such memory systems.[2][3]
The term preemptive wear leveling (PWL) has been used by Western Digital to describe their preservation technique used on hard disk drives (HDDs) designed for storing audio and video data.[4] However, HDDs generally are not wear-leveled devices in the context of this article.
^U.S. patent 6,850,443 Wear leveling techniques for flash memory systems.
^Perdue, Ken (2010-04-30). "Wear Leveling Application Note" (PDF). Spansion. Archived from the original (PDF) on 2011-06-07. Retrieved 12 August 2010.
^"USB Flash Wear-Leveling and Life Span" (PDF). Corsair. June 2007. Archived from the original (PDF) on 13 October 2007. Retrieved 27 July 2013.
^"Western Digital AV Hard Drive Product Information". Western Digital. Archived from the original on 2010-01-02. Retrieved 2010-06-01.
Wearleveling (also written as wearlevelling) is a technique for prolonging the service life of some kinds of erasable computer storage media, such as...
storage device. For this reason flash controllers use a technique called wearleveling to distribute writes as evenly as possible across all the flash blocks...
would not add more than 5 GB of free space for garbage collection and wearleveling. In those situations, increasing the amount of over-provisioning by...
circuitry to perform bad block management and wearleveling. When a logical block is accessed by high-level software, it is mapped to a physical block by...
seeking. Flash memory devices impose no seek latency. Wearleveling: flash memory devices tend to wear out when a single block is repeatedly overwritten;...
life of simple flash memory devices. Some USB flash drives have this 'wearleveling' feature built into the software controller to prolong device life,...
purposes, tracking NAND flash memory bad blocks and providing wearleveling. Wearleveling spreads the erases and writes across the entire flash device...
flash-memory devices limit wear on blocks by varying the physical location to which a block is written. This process is called wearleveling. When using CompactFlash...
interfaces, but have different problems. At low level, they require special handling such as wearleveling and different error detection and correction algorithms...
recommended since there is neither detection of bad blocks nor any kind of wearleveling. MTDs don't address to the kernel like traditional storage devices (Solid...
cards use wearleveling, in which frequently modified blocks are mapped to different portions of memory at different times, and some wear-leveling algorithms...
a diagnostic tool used in dermatology Working level, a measure of exposure to radon gas Wearleveling World Leader, the athlete with the best mark, time...
locations, either by design (for fault tolerance), or as data remnants. Wearleveling can also defeat data erasure, by relocating blocks between the time...
Wear OS (also known simply as Wear and formerly Android Wear) is a version of Google's Android operating system designed for smartwatches and other wearables...
and writing due to the asymmetric read/write duration and due to wear. (See wearleveling.) In MS-DOS and Microsoft Windows, the temporary directory is set...
the block can be erased for reuse by the garbage collector. WearLeveling: WearLeveling sometimes requires data to be internally moved from one block...
Tyne and Wear (/ˌtaɪn ... ˈwɪər/) is a ceremonial county in North East England. It borders Northumberland to the north and County Durham to the south...
contribution to wear-leveling techniques for persistent memories: "an elegant, efficient, and easily-implemented solution to the wear-leveling problem and has...
4 GiB hard drive, solid-state drive, or USB flash drive with static wearleveling support for the OS. 1 hard drive, solid-state drive, or USB flash drive...
prevent confusion if power is lost during an erase operation). To make wear-levelling more even and prevent erasures from being too concentrated on mostly-static...
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