Li-Pin Chang
Li-Chun Huang
ABSTRACT
Multilevel flash memory cells double or even triple storage density, producing affordable solid-state disks for end users. However, flash lifetime is becoming a critical issue in the popularity of solid-state disks. Wear-leveling methods can prevent flash-storage devices from prematurely retiring any portions of flash memory. The two practical challenges of wear-leveling design are implementation cost and tuning complexity. This study proposes a new wear-leveling design that features both simplicity and adaptiveness. This design requires no new data structures, but utilizes the intelligence available in sector-translating algorithms. Using an on-line tuning method, this design adaptively tunes itself to reach good balance between wear evenness and overhead. A series of trace-driven simulations show that the proposed design outperforms a competitive existing design in terms of wear evenness and overhead reduction. This study also presents a prototype that proves the feasibility of this wear-leveling design in real solid-state disks.
- N. Agrawal, V. Prabhakaran, T. Wobber, J. D. Davis, M. Manasse, and R. Panigrahy. Design tradeoffs for SSD performance. In ATC'08: USENIX 2008 Annual Technical Conference on Annual Technical Conference, pages 57--70. USENIX Association, 2008. Google Scholar
Digital Library
- L.-P. Chang and C.-D. Du. Design and implementation of an efficient wear-leveling algorithm for solid-state-disk microcontrollers. ACM Trans. Des. Autom. Electron. Syst., 15 (1): 1--36, 2009. Google ScholarDigital Library
- L.-P. Chang and T.-W. Kuo. Efficient management for large-scale flash-memory storage systems with resource conservation. ACM Transactions on Storage, 1 (4): 381--418, 2005. Google ScholarDigital Library
- L.-P. Chang, T.-W. Kuo, and S.-W. Lo. Real-time garbage collection for flash-memory storage systems of real-time embedded systems. ACM Trans. on Embedded Computing Sys., 3 (4): 837--863, 2004. Google ScholarDigital Library
- Y.-H. Chang, J.-W. Hsieh, and T.-W. Kuo. Improving flash wear-leveling by proactively moving static data. IEEE Transactions on Computers, 59 (1): 53 --65, jan. 2010. Google ScholarDigital Library
- M.-L. Chiang, P. C. H. Lee, and R. chuan Chang. Using data clustering to improve cleaning performance for flash memory. Software Practice and Experience, 29 (3): 267--290, 1999. Google ScholarDigital Library
- A. Gupta, Y. Kim, and B. Urgaonkar. Dftl: a flash translation layer employing demand-based selective caching of page-level address mappings. In ASPLOS '09: Proceeding of the 14th international conference on Architectural support for programming languages and operating systems, pages 229--240. ACM, 2009. Google ScholarDigital Library
- 006)}b:systemcIEEE Standards Association. IEEE Std 1666--2005 IEEE Standard SystemC Language Reference Manual. pages 1--423, 2006.Google Scholar
- D. Jung, Y.-H. Chae, H. Jo, J.-S. Kim, and J. Lee. A group-based wear-leveling algorithm for large-capacity flash memory storage systems. In CASES '07: Proceedings of the 2007 international conference on Compilers, architecture, and synthesis for embedded systems, pages 160--164. ACM, 2007. Google ScholarDigital Library
- J.-U. Kang, J.-S. Kim, C. Park, H. Park, and J. Lee. A multi-channel architecture for high-performance NAND flash-based storage system. J. Syst. Archit., 53 (9): 644--658, 2007. Google ScholarDigital Library
- H.-J. Kim and S.-G. Lee. An effective flash memory manager for reliable flash memory space management. IEICE Transactions on Information and System., 85 (6): 950--964, 2002.Google Scholar
- S.-W. Lee, D.-J. Park, T.-S. Chung, D.-H. Lee, S. Park, and H.-J. Song. A log buffer-based flash translation layer using fully-associative sector translation. Trans. on Embedded Computing Sys., 6 (3): 18, 2007. Google ScholarDigital Library
- Wear-Leveling Techniques in NAND Flash Devices. Micron® Application Note (TN-29--42), 2008.Google Scholar
- Wear Leveling in Single Level Cell NAND Flash Memories. Numonyx® Application Note (AN1822), 2006.Google Scholar
- C. Park, W. Cheon, J. Kang, K. Roh, W. Cho, and J.-S. Kim. A reconfigurable ftl (flash translation layer) architecture for nand flash-based applications. ACM Trans. Embed. Comput. Syst., 7 (4): 1--23, 2008. Google ScholarDigital Library
- K. Rosen. Discrete mathematics and its applications. McGraw-Hill New York, 2003. ISBN 0072424346.Google Scholar
- K9F8G08B0M 1Gb * 8 Bit SLC NAND Flash Memory Data Sheet. Samsung Electronics Company, 2006.Google Scholar
- K9MDG08U5M 4G * 8 Bit MLC NAND Flash Memory Data Sheet. Samsung Electronics Company, 2008.Google Scholar
- Y. J. Seong, E. H. Nam, J. H. Yoon, H. Kim, J.-Y. Choi, S. Lee, Y. H. Bae, J. Lee, Y. Cho, and S. L. Min. Hydra: A block-mapped parallel flash memory solid-state disk architecture. IEEE Transactions on Computers, 59: 905--921, 2010. Google ScholarDigital Library
- Wear Leveling. Spansion® Application Note (AN01), 2008.Google Scholar
- SmartMedia® Specification. SSFDC Forum, 1999.Google Scholar
- S. P. D.-H. L. S.-W. L. Tae-Sun Chung, Dong-Joo Park and H.-J. Song. System software for flash memory: a survey. In EUC '06: Embedded and Ubiquitous Computing, pages 394--404, 2006. Google ScholarDigital Library
Index Terms
- A low-cost wear-leveling algorithm for block-mapping solid-state disks
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