3D-FlashMap: A physical-location-aware block mapping strategy for 3D NAND flash memory

Yi Wang, Luis Angel D. Bathen, Zili Shao, Nikil D. Dutt

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

32 Citations (Scopus)

Abstract

Three-dimensional (3D) flash memory is emerging to fulfil the ever-increasing demands of storage capacity. In 3D NAND flash memory, multiple layers are stacked to increase bit density and reduce bit cost of flash memory. However, the physical architecture of 3D flash memory leads to a higher probability of disturbance to adjacent physical pages and greatly increases bit error rates. This paper presents 3D-FlashMap, a novel physical-location-aware block mapping strategy for three-dimensional NAND flash memory. 3D-FlashMap permutes the physical mapping of blocks and maximizes the distance between consecutively logical blocks, which can significantly reduce the disturbance to adjacent physical pages and effectively enhance the reliability. We apply 3D-FlashMap to a representative flash storage system. Experimental results show that the proposed scheme can reduce uncorrectable page errors by 85% with less than 2% space overhead in comparison with the baseline scheme.
Original languageEnglish
Title of host publicationProceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2012
Pages1307-1312
Number of pages6
Publication statusPublished - 24 May 2012
Event15th Design, Automation and Test in Europe Conference and Exhibition, DATE 2012 - Dresden, Germany
Duration: 12 Mar 201216 Mar 2012

Conference

Conference15th Design, Automation and Test in Europe Conference and Exhibition, DATE 2012
Country/TerritoryGermany
CityDresden
Period12/03/1216/03/12

ASJC Scopus subject areas

  • Engineering(all)

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