A Block Classification Method with Monitor and Restriction in NAND Flash memory
Main Article Content
Abstract
Flash memory has the advantages of fast access speed, low power consumption, and low price. Therefore, it is widely used in many sectors of the electronics industry. However, the flash memory also has a disadvantage of a limited number of P/E (Program/Erase) cycles. Many wear-leveling techniques have been studied to prolong the lifetime of flash memory by equalizing the P/E cycles of the blocks. This paper proposes BCMR (a Block Classification with Monitor and Restriction) method to isolate and reduce the interference of blocks in garbage collection and wear leveling. The BCMR method monitors the endurance variation of blocks during garbage collection and detects hot blocks by making a restriction condition based on this information. This method induces block classification by its update frequency for garbage collection and wear leveling, resulting in a prolonged lifespan for NAND (Not AND) flash memory systems. This paper shows the block standard deviation, which was reduced by up to 11% when BCMR was implemented. And we show the average number of page migrations during garbage collection and wear leveling, which was reduced by about 1% when BCMR was activated. The performance evaluation results show that the BCMR method prolonged the life of NAND flash memory systems by 3.95% and reduced the standard deviation per block by 7.4%, on average.
Downloads
Metrics
Article Details
You are free to:
- Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
- Adapt — remix, transform, and build upon the material for any purpose, even commercially.
- The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Notices:
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation .
No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.
