Title :
Optimizing RAID for long term data archives
Author :
Klein, Henning ; Keller, Jörg
Author_Institution :
Fujitsu Technol. Solutions GmbH, Augsburg, Germany
Abstract :
We present new methods to extend data reliability of disks in RAID systems for applications like long term data archival. The proposed solutions extend existing algorithms to detect and correct errors in RAID systems by preventing accumulation of undetected errors in rarely accessed disk segments. Furthermore we show how to change the parity layout of a RAID system in order to improve the performance and reliability in case of partially defect disks. All methods benefit of a hierarchical monitoring scheme that stores reliability related information. Our proposal focuses on methods that do not need significant hardware changes.
Keywords :
software fault tolerance; software reliability; RAID systems; disk data reliability; disk segments; hierarchical monitoring scheme; long term data archival; parity layout; redundant array of independent disks; Change detection algorithms; Computer errors; Computerized monitoring; Condition monitoring; Error correction; Fault tolerance; Hardware; Optimization methods; Proposals; Redundancy; Data Archival; Fault-Tolerant Software Design;
Conference_Titel :
Parallel & Distributed Processing, Workshops and Phd Forum (IPDPSW), 2010 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-6533-0
DOI :
10.1109/IPDPSW.2010.5470870
