Date: Sat, 30 Jul 2011 00:14:47 +0900
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SandForceの 2nd Generation Controller (SF-2500/ 2600) を採用した、
外付け SSDのベンチマークです:
SF-2500/2600
http://www.sandforce.com/index.php?id=133
http://www.sandforce.com/userfiles/file/downloads/SandForce_2500-2600ENT_PB_110616.pdf
SandForce
http://www.sandforce.com/
"Second-Gen SandForce: Seven 120 GB SSDs Rounded Up"
July 25, 2011, Tom's Hardware
http://www.tomshardware.com/reviews/sf-2200-sandforce-ssd,2987.html
"Five SSD vendors sent us seven 120 GB models based on the second-gen
logic. What makes them different? An extensive benchmark suite tells all."
7機種 (全て 120GB)
Adata: S511
Corsair: Force 3
Mushkin: Chronos Deluxe
OCZ: Vertex 3
OCZ: Agility 3
OCZ: Solid 3
Patriot: Wildfire
※基本諸元は、"1. A Lot More SandForce" に記載されています。
TABLE OF CONTENTS
1. A Lot More SandForce
2. How Can Seven SandForce-Based SSDs Differ?
3. Test Setup And Firmware Notes
4. What's Important: Steady-State Performance
5. Benchmark Results: Storage Bench v1.0 And Real-World Analysis
6. Benchmark Results: 4 KB Random Performance (Throughput)
7. Benchmark Results: 4 KB Random Performance (Response Time)
8. Benchmark Results: 128 KB Sequential Performance
9. Sequential Performance Versus Transfer Size
10. PCMark 7: Storage Suite
11. Final Words
2. How Can Seven SandForce-Based SSDs Differ? に NAND構成比較があります。
Open NAND Flash Interface (ONFI)
http://onfi.org/
4. What's Important: Steady-State Performance
Steady-State Performance
"SSD manufacturers prefer that we benchmark drives the way they behave
fresh out of the box because solid-state drives slow down once you start
using them. If you give an SSD enough time, though, it will reach
a steady-state performance level. At that point, its benchmark results
reflect more consistent long-term use. In general, reads are a little
faster, writes are slower, and erase cycles happen as slow as you'll
ever see from the drive."
.....
"... It's really the only way to examine the true performance of an SSD
in a way that represents what you'll actually see over time."
"There are multiple ways to get there, but we're going to use Intel's
IPEAK (Intel Performance Evaluation and Analysis Kit). This is
a trace-based benchmark, which means that we're using an I/O recording
to measure relative performance. Our trace, which we're dubbing Storage
Bench v1.0, comes from a two-week recording of my own personal machine,
and it captures the level of I/O that you would see during the first
two weeks of setting up a computer.
Installation includes:"
※Games, MS Office, Firefox, VMware, Photoshop等
"The following are stats on the two-week trace of my personal workstation:
Statistics: Storage Bench v1.0
Read Operations: 7,408,938
Write Operations: 3,061,162
Data Read: 84.27 GB
Data Written: 142.19 GB
Max Queue Depth: 452"
※上記 Trace-Basedの Tom's Hardware Storage Bench v1.0以外に
3. Test Setup And Firmware Notes
Iometer 1.1.0
ATTO Benchmark
PCMark 7
※パラメータは上記ページに示してあります。
11. Final Words
Tom's Hardwareとしては、
"Our 120 GB recommendation goes to the Vertex 3. It costs 20% more than
the Agility 3 at the same capacity, but its price scales with performance,
as you can also look forward to getting 22% more performance (at least
in our Storage Bench v1.0 benchmark)."
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