Sequential Read/Write Performance

To measure sequential read and write performance I created an iometer test script to read and write 2MB files to the drives. The writes are 100% sequential and are performed on an unpartitioned drive for 3 minutes.

Performance is reported in MB/s, higher numbers are better.

The sequential read performance of the latest generation of SSDs is nothing short of amazing. The OCZ Vertex pulls through with 250MB/s, over twice the speed of the VelociRaptor and 2.5x the speed of the Samsung SLC drive that OCZ used to sell for $1000.

Looking at write performance we see things change a bit. The OCZ Summit and Intel X25-E are the only two drives that can outperform the VelociRaptor, and they do so handsomely. The rest of the drives fall below even the 7200 RPM Caviar SE16. They are by no means slow, they just don't destroy the fastest hard drives as they do in other tests.

While the X25-E should perform the way it does, the OCZ Summit uses MLC flash yet it performs like an SLC drive. This is a very important benchmark as it shows the sort of performance Samsung has optimized for with its controller. This drive is designed to shatter bandwidth barriers, but what about latency?

The Test Random Read/Write Performance
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  • sfisher64 - Wednesday, April 08, 2009 - link

    I just purchased a Dell Latitude E6400 with a 64GB Ultra Performance Solid State Drive. Does anyone know what type of drive this is, and where it fits in the spectrum described in this article? Reply
  • Baffo - Saturday, April 11, 2009 - link

    The Dells use the Samsung drives (you should see this on the bottom if you pull it out). However, as much as I wish this was one of the newer controllers (I have a few of these at work as well), the testing cycles demanded by Dell probably mean these are the older controllers. Reply
  • marraco - Tuesday, April 07, 2009 - link

    This article is popular :) Reply
  • BLHealthy4life - Monday, April 06, 2009 - link

    Intel 9.1.1.1010 (Intel) Where are these drivers? I can only find version 1007 and not 1010....

    Thanks
    Reply
  • BLHealthy4life - Sunday, April 12, 2009 - link

    found it....

    Intel obviously keeps the X58 chipset drivers current for their own boards, just not other mfgs boards....

    They installed fine on my R2E..

    BL
    Reply
  • irondukes - Friday, April 03, 2009 - link

    Hi-- Do SLCs suffer from performance degradation, or are the controllers pretty agressive at erasing the data since they have far longer read-write cycles? Please help! Deciding between an X25E and X25M Reply
  • mdavies - Friday, April 03, 2009 - link

    I'm reading this about a day late - got my Patriot PE256GS25SSDR 2.5" 256GB yesterday since I'm bad about destroying hard drives. this drive, in a word, was excruciating. I'll be replacing it with one of your recommended drives today.

    Thanks
    Reply
  • sotoa - Friday, April 03, 2009 - link

    Long time reader, first time post.
    I really liked the background story and appreciate how Anand delves deep into the the SSD's (as well as other products in other articles).

    Thanks for looking out for the little guy!
    Keep up the great work!
    Reply
  • siliq - Wednesday, April 01, 2009 - link

    With Anand's excellent article, it's clear that the sequential read/write thoroughput doesn't matter so much - all SSDs, even the notorious JMicron series, can do a good job on that metric. What is relevant to our daily use is the random write rate. Latencies and IOs/second are the most important metric in the realm of SSD.

    Based on that, I would suggest Anand (and other Tech reporters) to include a real world test of evaluating the Random Write performance for SSD. Because current real-world tests: booting windows, loading games, rendering 3D, etc. they focus on the random read. However, measuring how long it takes to install Windows, Microsoft Visual Studio, or a 4-GB PC Game would thoroughly test the Random Write / Latency performance. I think this is a good complementary of our current testing methodology
    Reply
  • Sabresiberian - Tuesday, March 31, 2009 - link

    Just wanted to add my thanks to Anand for this article in particular and for the quality work he has done over the years; I am so grateful for Anandtech's quality and information and the fact that it has been maintained! Reply

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