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Google Releases Paper on Disk Reliability

oski4410 Re:How many drives really (267 comments)

Did you read Bianca's paper? I'm not sure how you can ignore the evidence of non-Poisson distributions to maintain your claim that "failures are still a Poisson process"... Also, it's *very* likely that vintage is correlated with temperature. Servers built in 2001 are very likely to have different thermal characteristics (e.g., different airflow, layout, and thus disk drive temperatures). On top of that, the power consumption of disk drives has increased meaningfully over that time period, so that a 2001 5400rpm drive very likely runs cooler than a new 7200rpm drive.

more than 7 years ago

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oski4410 oski4410 writes  |  more than 7 years ago

oski4410 (1065340) writes "The Google engineers just published a paper on Failure Trends in a Large Disk Drive Population. Based on a study of 100,000 disk drives over 5 years they find some interesting stuff. To quote from the abstract:

"Our analysis identifies several parameters from the drive's self monitoring facility (SMART) that correlate highly with failures. Despite this high correlation, we conclude that models based on SMART parameters alone are unlikely to be useful for predicting individual drive failures. Surprisingly, we found that temperature and activity levels were much less correlated with drive failures than previously reported.""

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