Wear Leveling

Wear leveling (also written wear levelling) is a technique for prolonging the service life of some kinds of erasable computer storage media, such as Flash memory used in solid-state drives (SSDs) and USB Flash drives. There are a few wear leveling mechanisms used in Flash memory systems, each with varying levels of longevity enhancement.

The term preemptive wear leveling (PWL) has been used by Western Digital to describe their preservation technique used on audio-video hard disks, but hard disk drives are not generally wear-leveled devices in the context of this article.

Read more about Wear LevelingRationale, Types, Techniques

Other articles related to "wear, wear leveling":

CompactFlash - Technical Details - Reliability
... any "block." (Read cycles do not cause wear to the device.) Cards using NOR flash had a write endurance of 10,000 cycles ... Most CompactFlash flash-memory devices limit wear on blocks by varying the physical location to which a block is written ... This process is called wear leveling ...
Flash File Systems
... Wear leveling Flash memory devices tend to wear out when a single block is repeatedly overwritten flash file systems are designed to spread out writes evenly ... of flash memory, it is best used with either a controller to perform wear leveling and error correction or specifically designed flash file systems, which spread writes over ... and USB flash drives have built-in controllers to manage MTD with dedicated algorithms, like wear leveling, bad block recovery, power loss recovery, garbage collection and error ...
Flash File System
... Wear leveling Flash memory devices tend to wear out when a single block is repeatedly overwritten flash file systems are designed to spread out writes evenly ... is best used with either a controller to perform wear leveling and error correction or specifically designed flash file systems, which spread writes over the media and deal with the long erase ... to manage MTD with dedicated algorithms, like wear leveling, bad block recovery, power loss recovery, garbage collection and error correction, so use of a flash file system has limited benefit ...
Wear Leveling - Techniques
... in such a way that the space it uses is itself wear-leveled or, in the case of flash memory, in a block with a specially extended life ... product DiskOnChip used a software driver named TrueFFS which performed wear-leveling of NAND flash chips and made them appear to OS like a ... On such devices, wear leveling is transparent and most conventional file systems can be used as-is on them ...

Famous quotes containing the word wear:

    We wear a face of joy, because
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    William Wordsworth (1770–1850)