skip to main content
short-paper

Rebuttal to “Beyond MTTDL: A Closed-Form RAID-6 Reliability Equation”

Published:20 March 2015Publication History
Skip Abstract Section

Abstract

A recent article on the reliability of RAID-6 storage systems overlooks certain relevant prior work published in the past 20 years and concludes that the widely used mean time to data loss (MTTDL) metric does not provide accurate results. In this note, we refute this position by invoking uncited relevant prior work and demonstrating that the MTTDL remains a useful metric.

References

  1. P. M. Chen, E. K. Lee, G. A. Gibson, R. H. Katz, and D. A. Patterson. 1994. RAID: High-performance, reliable secondary storage. ACM Comput. Surv. 26, 2 (June 1994), 145--185. Google ScholarGoogle ScholarDigital LibraryDigital Library
  2. A. Dholakia, E. Eleftheriou, X.-Y. Hu, I. Iliadis, J. Menon, and K. K. Rao. 2006a. Analysis of a New Intra-Disk Redundancy Scheme for High-Reliability RAID Storage Systems in the Presence of Unrecoverable Errors. IBM Research Report, RZ 3652.Google ScholarGoogle Scholar
  3. A. Dholakia, E. Eleftheriou, X.-Y. Hu, I. Iliadis, J. Menon, and K. K. Rao. 2006b. Analysis of a new intra-disk redundancy scheme for high-reliability RAID storage systems in the presence of unrecoverable errors. ACM SIGMETRICS Perform. Eval. Rev. 34, 1 (June 2006), 373--374. (Proc. ACM SIGMETRICS 2006/Performance 2006, Saint Malo, France). Google ScholarGoogle ScholarDigital LibraryDigital Library
  4. A. Dholakia, E. Eleftheriou, X.-Y. Hu, I. Iliadis, J. Menon, and K. K. Rao. 2008. A new intra-disk redundancy scheme for high-reliability RAID storage systems in the presence of unrecoverable errors. ACM Trans. Storage 4, 1, Article 1 (May 2008), 42 pages. Google ScholarGoogle ScholarDigital LibraryDigital Library
  5. J. G. Elerath and J. Schindler. 2014. Beyond MTTDL: A closed-form RAID 6 reliability equation. ACM Trans. Storage 10, 2, Article 7 (March 2014), 21 pages. Google ScholarGoogle ScholarDigital LibraryDigital Library
  6. K. M. Greenan, J. S. Plank, and J. J. Wylie. 2010. Mean time to meaningless: MTTDL, Markov models, and storage system reliability. In Proceedings of the USENIX Workshop on Hot Topics in Storage and File Systems (HotStorage’10). 1--5. Google ScholarGoogle ScholarDigital LibraryDigital Library
  7. I. Iliadis, R. Haas, X.-Y. Hu, and E. Eleftheriou. 2011. Disk scrubbing versus intradisk redundancy for RAID storage systems. ACM Trans. Storage 7, 2, Article 5 (July 2011), 42 pages. Google ScholarGoogle ScholarDigital LibraryDigital Library
  8. D. A. Patterson, G. Gibson, and R. H. Katz. 1988. A case for redundant arrays of inexpensive disks (RAID). In Proceedings of the ACM SIGMOD International Conference on Management of Data. 109--116. Google ScholarGoogle ScholarDigital LibraryDigital Library
  9. A. Thomasian and M. Blaum. 2009. Higher reliability redundant disk arrays: Organization, operation, and coding. ACM Trans. Storage 5, 3, Article 7 (Nov. 2009), 59 pages. Google ScholarGoogle ScholarDigital LibraryDigital Library
  10. V. Venkatesan. 2012. Reliability Analysis of Data Storage Systems. Ph.D. Dissertation. EPFL, Lausanne, Switzerland.Google ScholarGoogle Scholar
  11. V. Venkatesan and I. Iliadis. 2012a. Effect of Codeword Placement on the Reliability of Erasure Coded Data Storage Systems. IBM Research Report, RZ 3827.Google ScholarGoogle Scholar
  12. V. Venkatesan and I. Iliadis. 2012b. A general reliability model for data storage systems. In Proceedings of the 9th International Conference on Quantitative Evaluation of Systems (QEST’12). 209--219. Google ScholarGoogle ScholarDigital LibraryDigital Library
  13. V. Venkatesan and I. Iliadis. 2013a. Effect of codeword placement on the reliability of erasure coded data storage systems. In Proceedings of the 10th International Conference on Quantitative Evaluation of Systems (QEST’13). 241--257. Google ScholarGoogle ScholarDigital LibraryDigital Library
  14. V. Venkatesan and I. Iliadis. 2013b. Effect of latent errors on the reliability of data storage systems. In Proceedings of the 21th Annual IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS’13). 293--297. Google ScholarGoogle ScholarDigital LibraryDigital Library
  15. V. Venkatesan, I. Iliadis, C. Fragouli, and R. Urbanke. 2011. Reliability of clustered vs. declustered replica placement in data storage systems. In Proceedings of the 19th Annual IEEE/ACM International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS’11). 307--317. Google ScholarGoogle ScholarDigital LibraryDigital Library
  16. V. Venkatesan, I. Iliadis, and R. Haas. 2012. Reliability of data storage systems under network rebuild bandwidth constraints. In Proceedings of the 20th Annual IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS’12). 189--197. Google ScholarGoogle ScholarDigital LibraryDigital Library

Index Terms

  1. Rebuttal to “Beyond MTTDL: A Closed-Form RAID-6 Reliability Equation”

              Recommendations

              Comments

              Login options

              Check if you have access through your login credentials or your institution to get full access on this article.

              Sign in

              Full Access

              PDF Format

              View or Download as a PDF file.

              PDF

              eReader

              View online with eReader.

              eReader
              About Cookies On This Site

              We use cookies to ensure that we give you the best experience on our website.

              Learn more

              Got it!