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OCZ Summit MLC SSD OCZSSD2-1SUM120G E-mail
Reviews - Featured Reviews: Storage
Written by Olin Coles   
Wednesday, 03 June 2009
Table of Contents: Page Index
Features and Specifications
First Look: Summit SSD
Summit Internal Components
SSD Testing Methodology
Random Access Time Benchmark
Basic IO Bandwidth
Random Access IOPS Tests
I/O Response Time
Linear Bandwidth Speed
Sequential Performance Tests
Buffered Transaction Speed
Windows XP Startup Times
The Truth Behind Heat Output
Solid State Drive Final Thoughts
OCZ Summit Conclusion

ATTO Disk Benchmark

The ATTO Disk Benchmark program is free, and offers a comprehensive set of test variables to work with. In terms of disk performance, it measures interface transfer rates at various intervals for a user-specified length and then reports read and write speeds for these spot-tests. There are some minor improvements made to the 2.34 version of the program, but the benchmark is still limited to non-linear samples up to 256MB. ATTO Disk Benchmark requires that an active partition be set on the drive being tested.

While the bandwidth results are not realistic for determining the maximum drive speeds, ATTO Disk Benchmark is still a good tool for illustrating bandwidth using various file size chunks. Please consider the results displayed by this benchmark to be basic bandwidth performance indicators.

Our basic I/O bandwidth tests begin with the OCZ Summit SSD connected to the integrated Intel ICH10R Southbridge chip, as the ATTO Disk Benchmark tools performs file transfers ranging from 0.5 KB to 8192 KB. The 128GB OCZSSD2-1SUM120G model reveals a 230 MBps read plateau from 128-8192 KB file chunks, while the 192 MBps write performance plateaus from 128-8192 KB. This is extremely impressive basic I/O bandwidth performance, and speed continues to climb with each new generation of Solid State Drive products released.


Sumsung has integrated a 128MB cache buffer into the OCZ Summit SSD, which helps it build speed quickly as it processes small-to-large file chunks. OCZ suggests a maximum read performance of 220 MBps, and write performance topping out at 200 MBps for the 128GB Summit SATA-II OCZSSD2-1SUM120G model, and from what we're seeing from ATTO these are very accurate expectations.

Drive Hardware

In our next section, we test linear read and write bandwidth performance of the OCZ Summit and compare its speed against several other top storage products. Benchmark Reviews feels that linear tests are the best method for testing SSD products, as detailed in our Solid State Drive Benchmark Performance Testing article.


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