Random Read/Write Speed

The four corners of SSD performance are as follows: random read, random write, sequential read and sequential write speed. Random accesses are generally small in size, while sequential accesses tend to be larger and thus we have the four Iometer tests we use in all of our reviews.

Our first test writes 4KB in a completely random pattern over an 8GB space of the drive to simulate the sort of random access that you'd see on an OS drive (even this is more stressful than a normal desktop user would see). I perform three concurrent IOs and run the test for 3 minutes. The results reported are in average MB/s over the entire time. We use both standard pseudo randomly generated data for each write as well as fully random data to show you both the maximum and minimum performance offered by SandForce based drives in these tests. The average performance of SF drives will likely be somewhere in between the two values for each drive you see in the graphs. For an understanding of why this matters, read our original SandForce article.

Desktop Iometer - 4KB Random Read

Desktop Iometer - 4KB Random Write

Desktop Iometer - 4KB Random Write (QD=32)

In random read/write tests the Vertex 460 and Vector 150 trade punches but the differences are minor. Our Vector 150 sample was tested a few months back so minor differences in firmware could account for the increased random read/write results, or it may simply be margin of error.

Sequential Read/Write Speed

To measure sequential performance I ran a 1 minute long 128KB sequential test over the entire span of the drive at a queue depth of 1. The results reported are in average MB/s over the entire test length.

Desktop Iometer - 128KB Sequential Read

Same goes for sequential performance: the Vertex 460 and Vector 150 perform more or less equally.

Desktop Iometer - 128KB Sequential Write

Sequential performance gives the Vector 150 a slight edge in both read and write results, but the difference is only a few percent at most.

AS-SSD Incompressible Sequential Read/Write Performance

The AS-SSD sequential benchmark uses incompressible data for all of its transfers. The result is a pretty big reduction in sequential write speed on SandForce based controllers.

Incompressible Sequential Read Performance

Incompressible Sequential Write Performance

AnandTech Storage Bench 2013 Performance vs. Transfer Size
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  • jragonsoul - Wednesday, January 22, 2014 - link

    But they really aren't, OCZ is still OCZ and they are still making their own drives. I see that as a smart move by them because if Toshiba would have swallowed the company and they made some SSD's I know at least me and my tech friends would have stayed well and far away until EXTENSIVE reviews appeared.
  • AssBall - Wednesday, January 22, 2014 - link

    OCZ had a bad run of drives and couldn't get it fixed. Years before that, they made excellent memory, and good PSU's. Their early SSD's were pretty good too. Being hung up on their screw up sounds like you can't get over personal issues. They will come back and be profitable again. Toshiba will help right the ship.
  • Samus - Wednesday, January 22, 2014 - link

    Yep. Let's not forget those poor early adopters of MacBook Air's that were unlucky enough to end up with a Toshiba drive instead of a Samsung (Apple was using both vendors through production, so it was luck of the draw)

    Needless to say Apple doesn't use Toshiba SSD's much anymore, even with their bitterness with Samsung.
  • lmcd - Thursday, January 23, 2014 - link

    "Much."

    So?
  • DarkStryke - Wednesday, January 22, 2014 - link

    You have some pretty nice revisionist history there. Take your own advice and learn about the history of OCZ, especially before the company incorporated under that title.

    I hear the overclockerz store had great customer service too!

    Once a fool..
  • GTVic - Thursday, January 23, 2014 - link

    My OCZ power supply died precisely after the warranty expired.
  • random2 - Sunday, February 2, 2014 - link

    You cannot blame a person for feeling that the OCZ name is a deterrent. Doesn't even have to be personal to want to see people avoid product that has not been good for years, hasn't been good through numerous models of drives, and has casued a great many people a lot of heart ache and frustration. All becasue OCZ couldn't bring themselves to make sure their product was viable and market ready BEFORE it went out their door.

    http://www.behardware.com/articles/881-7/component...

    Go ahead....buy an OCZ drive.
  • AMRAAM_Missiles - Thursday, March 20, 2014 - link

    Eventhough you make sense, that the company has a dark area which it lost the trust from a lot of people, it doesn't mean that it won't get better.

    My first ever SSD was the Vertex 4 from OCZ, and guess what, it is still regarded as one of the best Performance SSD that money could buy today. 3 solid years of grinding the OS with constants write and read, it shows no drop in performance. I am not saying that failures are not real, but it doesn't go the extend that people make it out to be.

    Now, i have just bought another Vector and Vector 150 for my rig, and i couldn't be more happier with a role of a normal consumer and an enthusiast of PC in general. Sometime, people just have to hate for the sake of hating without even trying to open their eyes to verify the current situation a little bit.
  • JDG1980 - Wednesday, January 22, 2014 - link

    That was my thought, as well. The purchase of OCZ made sense, because they have some decent controller IP and Toshiba wasn't too strong in that area, but the OCZ name is dirt because of their horrendous record of reliability, so I have no idea why they wanted to keep that.
  • Samus - Wednesday, January 22, 2014 - link

    I remember an interview Anand posted years ago with the CEO of OCZ, and Anand was pretty adamant about them ditching their name (for obvious reasons) and the CEO said they were going to keep it. That didn't work out so great for them. I don't see it working for Toshiba, either. They need to ditch the name and come up with another one, or just call it Toshiba.

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