[san-tech][01496] CRAY Research, Solid-State Storage Device (SSD)

Date: Mon, 16 Feb 2009 01:12:17 +0900
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CRAY Researchの CRAY-1、CRAY-MP用外付け SSDの資料を見つけました：
"CRAY-1 AND CRAY X-MP COMPUTER SYSTEMS
 SOLID-STATES STORAGE DEVICE (SSD)"
 REFERENCE MANUAL, HR-0031, December 1982.
  http://www.bitsavers.org/pdf/cray/HR-0031_SolidStateStorage_Dec82.pdf
  http://bitsavers.informatik.uni-stuttgart.de/pdf/cray/Disk/HR-0031_SolidStateStorage_Dec82.pdf
  https://archive.org/details/bitsavers_crayHR0031c82_2891629
2.8MB

Spec:
  8M, 16M, 32M (64bit word: 64 data bits and 8 check bits)
  100MB/s: CRAY-1S, CRAY-1M
  320MB/s (8M words) - 1250MB/s (32M word): CRAY-MP

Main Memory:
  CRAY-1S: 1, 2, 4M words
  CRAY-1M: 1, 2, 4M words
  CRAY-MP: 2 - 16M words

SSDの搭載メモリーは Single Error Correction/Double Error Detection
(SECDED) 構成になっています。以前紹介したこんな報告もありました：
"CRAY-1 Evaluation Final Report"
 T. W. Keller, LosAlamos Scientific Laboratory of the University of California,
 LA-6456-MS, December 1976
  http://institute.lanl.gov/data/fdata/papers/CRAY-1_reliability-LA-6456-MS.pdf
MTTF (Mean Time To Failure) は最大 7.08H (1976/4/5 - 9/24)
  "The Mean-Time-To-Failure (MTTF) fluctuated from a low of
   approximately 2.5 hours to a high of approximately 7.5 hours during
   the six-month period."
170障害のうち 152 (約 89%) がメモリ関係です (CRYA-1は ECC非実装)。
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[san-tech][02603] 1/10 Scale Cray-1 (Binary-compatible, Cycle-accurate in a Single FPGA)
  Date: Sat, 04 Sep 2010 22:27:58 +0900