Paper Info
Title
Highly Reliable Coding Methods for Emerging Applications: Archive and Enterprise Solid-State Drives (SSDs)
Abstract
This paper proposes highly reliable coding methods for applications in two extreme conditions. n-out-of-8 level cell (nLC) is proposed for archival applications which require significantly long data-retention time with small write/erase cycle. On the other hand, for applications with large write/erase cycle and short data-retention time (enterprise application, etc.), universal asymmetric coding (UAC) is proposed. nLC reduces the number of memory states to improve the reliability with low cost overhead. In 7LC, the bit-error rate (BER) reduction will be 79% after 1k-year data retention while seven memory states are efficiently used out of eight states. By considering nLC with error-correcting codes (ECCs), the optimum number of cell levels (n) can be determined to minimize the bit-cost with given acceptable data-retention time. In UAC, the coding method is changed according to the write/erase cycle and data-retention time to keep the BER low. As a result, BER is reduced by 52% at maximum, compared with the original random pattern.
Year
DOI
Venue
2015
10.1109/TCSI.2014.2380640
IEEE Trans. on Circuits and Systems
Keywords
Field
DocType
enterprise,encoding,ber,reliability,temperature measurement,bit error rate
Data retention,Enterprise application,Random pattern,Computer science,Coding (social sciences),Computer hardware,Solid-state
Journal
Volume
Issue
ISSN
62
3
1549-8328
Citations 
PageRank 
References 
2
0.38
6
Authors
5
Name
Order
Citations
PageRank
Shuhei Tanakamaru112118.35
Yuta Kitamura220.38
Senju Yamazaki391.37
Tsukasa Tokutomi4203.23
Ken Takeuchi58843.27