Corpus ID: 7786592

Empirical Measurements of Disk Failure Rates and Error Rates

  title={Empirical Measurements of Disk Failure Rates and Error Rates},
  author={J. Gray and C. Ingen},
The SATA advertised bit error rate of one error in 10 terabytes is frightening. We moved 2 PB through low-cost hardware and saw five disk read error events, several controller failures, and many system reboots caused by security patches. We conclude that SATA uncorrectable read errors are not yet a dominant system-fault source - they happen, but are rare compared to other problems. We also conclude that UER (uncorrectable error rate) is not the relevant metric for our needs. When an… Expand
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