Paper Info
Title
Dual RAID technique for ensuring high reliability and performance in SSD
Abstract
The use of MLC/TLC (Multiple/Triple Level Cell) flash memory increases bit error rate, and declines its reliability. To remedy this loss, the Redundancy Array of Inexpensive Disk (RAID) have been widely used to enhance the reliability of the Hard Disk Drive (HDD) and the Solid State Drive (SSD). RAID 5 and RAID 6 ensure high reliability among the various RAID techniques. These RAID techniques exploit parity to recover failures, it is updated whenever data renewed. The RAID 5 technique contains separated parity in a page of different stripes. In the RAID 6 technique, however, parity is written to double. So, RAID 6 guarantees more reliability. These RAID techniques enhance reliability, stability and data recovery capability in SSD. In this paper, we propose the dual RAID technique to use both RAID 5 and RAID 6 in a particular way depending on the data reliability. Reliability of data is divided to relatively high and low, these allows to be determined by user. At this time, data which requires high reliability is managed by the RAID 6 technique, and data which requires low reliability is managed by the RAID 5 technique. The purpose of this technique is to improve data recovery capability and I/O performance in SSD. This technique is evaluated by the trace-driven simulator with Financial1, Financial2, Exchange, and MSN traces. We confirm that the dual RAID technique improves I/O performance with ensuring high reliability.
Year
DOI
Venue
2015
10.1109/ICIS.2015.7166627
International Conference on Interaction Sciences
Keywords
Field
DocType
SSD, RAID, flash memory, reliability, dependability
Non-standard RAID levels,Computer science,Intel Matrix RAID,Standard RAID levels,RAID,Disk Data Format,Computer hardware,Disk array controller,Nested RAID levels,Parity drive
Conference
Citations 
PageRank 
References 
2
0.37
10
Authors
4
Name
Order
Citations
PageRank
Sohyun Koo120.71
Se Jin Kwon26710.44
Sungsoo Kim311524.95
Tae-Sun Chung480870.33