What's wrong with my SSD HD Tune peformance?

[RaistlinZ]

Hey all, I'm using an OCZ Vertex 2 120GB. When I run HD Tune the performance is all over the place for the first 90GB or so - it looks like a heart rate monitor at a hospital or an earthquake chart or something.. Then, near for the last 30GB performance stays up near 245Gb/sec in a flat like, like you'd expect from an SSD.

I currently have 70GB of free space left. Is it common for performance to jump around like that when you have data written to the drive? I have AHCI enabled in my BIOS. I'm just concerned that I'm not getting all the performance that I should be.

 

[=Wendy=]

If you are running the OS from the same drive as you are testing, then the results can be a bit all over the place from HD Tune, in my experience.

 

[AstroGuardian]

If you are running the OS from the same drive as you are testing, then the results can be a bit all over the place from HD Tune, in my experience.

Correct. Your OS accesses the SSD while the test takes place and this messing up the metrics. If you want to truly test it you should mount it as your secondary drive and empty it as well. Aside from this your problem is expected not just with SSDs but with hard drives as well

 

[sub.mesa]

HDDs are influences by background I/O but SSDs not very much; they are parallel devices.

But we are talking about unknown facts; post something to look at first, like a screenshot of your HDTune output. If you want sane numbers, try CrystalDiskMark instead.