Exploiting virtual channel flash management issue for cost-efficient NAND usage in mobile devices

Seung Ho Lim, Min Choi, Young Sik Jeong

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The recent evolution of NAND flash memory technologies has lead wealthy memory and storage space not only for system usage, but also user's preferences. Despite of the dramatic increase of flash capacity, the bandwidth of flash memory does not much evolved. Rather, the bandwidth of flash memory decreases due to the memory manufacture technologies. To overcome the bandwidth shrink for one flash memory interface, manufactures pack several flash memory die into one flash memory package, and the package interface is connected to host controller. However, this packaging could increase hardware and firmware overhead in terms of device complexity and cost. To mitigate cost issue of flash system development, we design and implement cost-efficient virtual channel based FTL. In the designed virtual channel FTL, the raw NAND chip is virtually divided into several regions, and each region is allocated to each virtual channel. Although the virtual channels cannot keep up with physical channels since all the channel cannot be utilized at the same time, it has better utilization of NAND flash chip with single channel FTL.

Original languageEnglish
Title of host publicationUbiquitous Information Technologies and Applications, CUTE 2012
Pages669-677
Number of pages9
DOIs
StatePublished - 2013
Event7th International Conference on Ubiquitous Information Technologies and Applications, CUTE 2012 - Hong Kong, China
Duration: 20 Dec 201222 Dec 2012

Publication series

NameLecture Notes in Electrical Engineering
Volume214 LNEE
ISSN (Print)1876-1100
ISSN (Electronic)1876-1119

Conference

Conference7th International Conference on Ubiquitous Information Technologies and Applications, CUTE 2012
Country/TerritoryChina
CityHong Kong
Period20/12/1222/12/12

Keywords

  • Cost-efficient
  • FTL
  • Mobile device
  • NAND flash
  • Virtual-channel

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