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2009
IEEE

Evaluating the impact of Undetected Disk Errors in RAID systems

9 years 1 months ago
Evaluating the impact of Undetected Disk Errors in RAID systems
Despite the reliability of modern disks, recent studies have made it clear that a new class of faults, Undetected Disk Errors (UDEs) also known as silent data corruption events, become a real challenge as storage capacity scales. While RAID systems have proven effective in protecting data from traditional disk failures, silent data corruption events remain a significant problem unaddressed by RAID. We present a fault model for UDEs, and a hybrid framework for simulating UDEs in large-scale systems. The framework combines a multi-resolution discrete event simulator with numerical solvers. Our implementation enables us to model arbitrary storage systems and workloads and estimate the rate of undetected data corruptions. We present results for several systems and workloads, from gigascale to petascale. These results indicate that corruption from UDEs is a significant problem in the absence of protection schemes and that such schemes dramatically decrease the rate of undetected data corru...
Eric Rozier, Wendy Belluomini, Veera Deenadhayalan
Added 16 Aug 2010
Updated 16 Aug 2010
Type Conference
Year 2009
Where DSN
Authors Eric Rozier, Wendy Belluomini, Veera Deenadhayalan, Jim Hafner, K. K. Rao, Pin Zhou
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