Reprints from my posting to SAN-Tech Mailing List and ...


[san-tech][03317] SSDの信頼性 ("Investigation: Is Your SSD More Reliable Than A Hard Drive?", July 29, 2011, Tom's Hardware)

Date: Sun, 31 Jul 2011 23:43:46 +0900

"Investigation: Is Your SSD More Reliable Than A Hard Drive?"
 July 29, 2011, Tom's Hardware

  "Does a lack of moving parts translate to higher reliability?
   That's the assumption many enthusiasts and IT professionals make
   about SSDs. We go straight to the data centers using these devices,
   dig into failure rate statistics, and suggest otherwise."

※これだけの協力を得たことはすごいと思います (15万台規模に驚き)。

Table of Contents

  1. SSD Reliability: Is Your Data Really Safe?
  2. What Do We Know About Storage?
  3. A Peek Into SSD Reliability
  4. Data Center Feedback: Fewer Than 100 SSDs
  5. Steadfast Networks: More Than 100 SSDs
  6. Softlayer: Roughly 5000 SSDs!
  7. Is Reliability Important?
  8. Decrypting Failure Statistics: ZT Systems (~155,000 SSDs)
  9. Final Words

そんな方には、後で紹介する Robin Harrisさんの Blogをお勧めします。


5th USENIX Conference on File and Storage Technologies (FAST 07)
"Failure Trends in a Large Disk Drive Population"
 Eduardo Pinheiro, Wolf-Dietrich Weber, and Luiz Andre Barroso, Google Inc.
"Disk Failures in the Real World: What Does an MTTF of 1,000,000 Hours Mean to You?"
 Bianca Schroeder and Garth A. Gibson, Carnegie Mellon University

に目を通しておくことを勧めています (少なくとも後者は)。

1. SSD Reliability: Is Your Data Really Safe? 
の JEDECの件は、これと関係あるのかな
[san-tech][02703] JEDEC Announces Publication of Solid State Drive Standards
  Date: Tue, 05 Oct 2010 12:49:30 +0900

StorageMojoの Robin Harrisさんがずばっと

"SSDs no more reliable than hard drives"
 July 29, 2011, Robin Harris, Storage Bits

  "A great piece of investigative reporting in Tom's Hardware on SSD
   reliability today. Writer Andrew Ku talked to users of more than
   160,000 SSDs and tabulated their responses. It is the largest scale
   study of SSDs ever - other than what vendors keep close to the vest.

   It is a long report and if you are professionally responsible -
   or just really curious - about SSDs I urge you to read it right now.
   But if you want the high points - and some advice - read on."


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