Sub-grouped superblock management for high-performance flash storages

Jung Wook Park, Gi Ho Park, Charles Weems, Shin Dug Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In this paper we describe a new superblock management scheme to overcome the problem of increased erase operations, that results from increasing the degree of interleaving of memory banks in flash memory based storage devices. To improve performance, superblock management is used to increase the degree of linear inter-leaving of flash memory banks. However, increased interleaving may significantly increase the number of erase operations, thus decreasing device lifetime. The proposed management scheme efficiently separates hot and cold data into two different sub-groups, dramatically increasing the efficiency of superblock merging. According to our simulation results, the number of erase operations decreases by around 27.3 percent, which is enough to significantly lengthen overall device lifetime. Read performance is only slightly degraded by our approach.

Original languageEnglish
Pages (from-to)297-303
Number of pages7
Journalieice electronics express
Volume6
Issue number6
DOIs
Publication statusPublished - 2009 Mar 25

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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