[san-tech][02207] Re: RAID信頼性モデル (博士論文：Jon Elerath, NetApp)

Date: Mon, 12 Apr 2010 00:55:57 +0900
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[san-tech][01482] RAID信頼性モデル (博士論文：Jon Elerath, NetApp)
[san-tech][01693] Re: RAID信頼性モデル (博士論文：Jon Elerath, NetApp)
[san-tech][02154] Re: RAID信頼性モデル (博士論文：Jon Elerath, NetApp)

> "An Analysis of Latent Sector Errors in Disk Drives"
>  Lakshmi N. Bairavasundaram, Garth R. Goodson, Shankar Pasupathy, Jiri Schindler.
>  Proceedings of the International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS'07)
>  San Diego, California. June 2007.
>   http://www.cs.wisc.edu/adsl/Publications/trust-storagess07.html
>   http://www.cs.wisc.edu/adsl/Publications/trust-storagess07.pdf

上の発表を元にした分析：
"Evaluating the Impact of Irrecoverable Read Errors on Disk Array Reliability"
 Jehan-Francois Paris, Ahmed Amer, Darrell D. E. Long and Thomas Schwarz
 Proceedings of the IEEE 15th Paci?c Rim International Symposium on
 Dependable Computing (PRDC09)
  http://www.ssrc.ucsc.edu/pub/paris09-prdc.html
  http://www2.cs.uh.edu/~paris/MYPAPERS/Prdc09.pdf



Abstract
  "We investigate the impact of irrecoverable read errors - also known
   as bad blocks - on the MTTDL of mirrored disks, RAID level 5 arrays
   and RAID level 6 arrays. Our study is based on the data collected
   by Bairavasundaram et al. from a population of 1.53 million disks
   over a period of 32 months. Our study indicates that irrecoverable
   read errors can reduce the mean time to data loss (MTTDL) of the three
   arrays by up to 99 percent, effectively canceling most of the benefits
   of fast disk repairs. It also shows the benefits of frequent scrubbing
   scans that map out bad blocks thus preventing future irrecoverable read
   errors. As an example, once-a-month scrubbing scans were found to
   improve the MTTDL of the three arrays by at least 300 percent compared
   to once-a-year scrubbing scans."

Reliable Storage Project, Storage Systems Research Center, UCSC
  http://www.ssrc.ucsc.edu/proj/reliablefs.html
Storage Systems Research Center, UCSC
  http://www.ssrc.ucsc.edu/
※CMU PDLと同格規模の全米屈指の大学でのストレージ/ファイルシステムの
研究センターです。
Publications
  http://www.ssrc.ucsc.edu/pubs/rev_pub_date.html
SSRC Research
  http://www.ssrc.ucsc.edu/research.html

The LANL Institutesと共同研究しているのも大きいと思います。
The LANL Institutes
  http://institutes.lanl.gov/institutes/
Information Science & Technology Institute (ISTI) Metrics
Paper
  http://institutes.lanl.gov/isti/metrics/papers/
UCSCとの共著が多いです。