Paper Info
Title
Prolongation of Lifetime and the Evaluation Method of Dependable SSD.
Abstract
Since high-density flash memory has high error rate, strong error control is necessary for the solid-state drive (SSD). The number of erasure cycles of each memory cell is limited, where the cell should be erased before writing. Wear-leveling is used for leveling the erasure cycles in a flash memory. Since the existing wear-leveling is executed in a chip, it is not effective if write operations are concentrated into specified chips. This paper proposes wear-leveling and error control method by using redundant flash memories in order to improve reliability and lifetime of the SSD. In the proposed method, error control is usually executed, and wear-leveling among the chips is executed when the bias in the erasure cycles is large. The execution frequency of wear-leveling is adjusted considering deterioration of the cell. Evaluations of bit error rate and lifetime show that the proposed method has high reliability and durability.
Year
DOI
Venue
2010
10.1109/DFT.2010.60
DFT
Keywords
Field
DocType
erasure cycle,bit error rate,error control method,strong error control,flash memory,evaluation method,existing wear-leveling,high-density flash memory,dependable ssd,error control,high error rate,chip,encoding,writing,reliability,error rate,error correction
Flash memory,Computer science,Wear leveling,Word error rate,Real-time computing,Error detection and correction,Solid-state drive,Bit error rate,Erasure,Encoding (memory)
Conference
ISSN
Citations 
PageRank 
1550-5774
0
0.34
References 
Authors
8
2
Name
Order
Citations
PageRank
Kensuke Tai100.68
Masato Kitakami22512.29