Paper Info
Title
Evaluation of Applied Intra-disk Redundancy Schemes to Improve Single Disk Reliability
Abstract
Exponentially growing capacities of disk drives have increased the problem that not only a complete disk can fail, but also individual, small groups of sectors can be erroneous. These sector errors are especially critical during RAID rebuilds because they can only be detected when the corresponding sectors are read. Mechanisms to cope with sector errors, therefore, have become an important way to improve disk reliability. One approach to deal with sector errors is the introduction of intra-disk redundancy, where additional redundancy blocks are calculated and stored for each set of disk sectors. Previous studies have introduced intra-disk redundancy schemes and have evaluated their impact on disk reliability. None of these studies has evaluated the influence on disk drive performance or the underlying energy consumption. The study presented in this paper benchmarks existing schemes concerning these metrics. It shows the surprising result that weaker codes combined with newly introduced scrambling techniques can produce faster layouts with similar reliability properties than previously proposed strong codes.
Year
DOI
Venue
2011
10.1109/MASCOTS.2011.13
MASCOTS
Keywords
Field
DocType
improve single disk,disk drive,complete disk,disk reliability,intra-disk redundancy,disk drive performance,sector error,applied intra-disk redundancy schemes,additional redundancy block,disk sector,corresponding sector,intra-disk redundancy scheme,reliability,encoding,raid,evaluation,redundancy
Scrambling,Computer science,Real-time computing,Redundancy (engineering),RAID,Energy consumption,Disk sector,Distributed computing,Encoding (memory)
Conference
Citations 
PageRank 
References 
8
0.46
20
Authors
5
Name
Order
Citations
PageRank
Matthias Grawinkel1324.43
Thorsten Schafer2665.12
Andre Brinkmann320227.48
Jens Hagemeyer4749.47
Mario Porrmann542050.91