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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  • giyan - Friday, January 06, 2017 - link

    this is right . http://www.forobd.de/ Reply
  • MAKK2016 - Friday, December 30, 2016 - link

    I need to run HDDErase on an X25-M. No matter what bootable CD or flash drive I create, HDDErase does not see either of my SATA hard drives. I already disabled AHCI in BIOS. Also, I am using version 3.3. I know that 4.0 does not work with the X25-M.

    Can someone help me troubleshoot this please? Thanks.

    SImon : http://www.e-consulting.ma/
    Reply
  • mitesh24 - Thursday, January 05, 2017 - link

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  • priya95 - Friday, April 14, 2017 - link

    What do you mean by drives fail? Please elaborate !
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  • adsmith82 - Monday, September 14, 2009 - link

    I need to run HDDErase on an X25-M. No matter what bootable CD or flash drive I create, HDDErase does not see either of my SATA hard drives. I already disabled AHCI in BIOS. Also, I am using version 3.3. I know that 4.0 does not work with the X25-M.

    Can someone help me troubleshoot this please? Thanks.
    Reply
  • gallde - Thursday, June 11, 2009 - link

    You point out that TRIM will only work on deletions, not on overwrites. But, couldn't a smart controller look at blocks that have a majority of invalid pages and "trim" them as well, recovering clean pages as a background process? Reply
  • forsunny - Thursday, August 13, 2009 - link

    Why not just make the SSDs capable of individual page erases instead of blocks? Problem solved. Reply
  • Ron White - Sunday, August 31, 2014 - link

    Erasing the NAND transistor in an SSD requires such a large jolt of voltage that it would affect surrounding transistors. Reply

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