Flexible block management with data migration wear-leveling algorithm for phase change memory

Mi Zhou; Xiaogang Chen; Shunfen Li; Yueqing Wang; Yifeng Chen; Gezi Li; Yuchan Wang; Zhitang Song

doi:10.1587/elex.11.20140924

LETTER

Flexible block management with data migration wear-leveling algorithm for phase change memory

Mi Zhou, Xiaogang Chen, Shunfen Li, Yueqing Wang, Yifeng Chen, Gezi Li, Yuchan Wang, Zhitang Song

Author information

Mi Zhou
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences
University of Chinese Academy of Sciences
Xiaogang Chen
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences
Shunfen Li
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences
Yueqing Wang
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences
University of Chinese Academy of Sciences
Yifeng Chen
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences
Gezi Li
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences
University of Chinese Academy of Sciences
Yuchan Wang
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences
University of Chinese Academy of Sciences
Zhitang Song
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences

Keywords: phase change memory, wear-leveling, endurance, block management

JOURNAL FREE ACCESS

2014 Volume 11 Issue 22 Pages 20140924

DOI https://doi.org/10.1587/elex.11.20140924

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Abstract

Phase change memory (PCM) is regarded as a powerful competitor for future non-volatile memory applications. However, a key drawback is its limited write endurance. This paper proposes a flexible block management method with data migration wear-leveling algorithm (FBDM). The proposed method divides blocks into two halves meanwhile blocks can be split and merged flexibly. Data migration wear-leveling algorithm has been presented to extend the life of PCM. We simulated our method using different traces and compare it with previous methods. Simulation results show that the proposed method outperforms comparison methods in terms of wear evenness and overhead reduction.

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