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SSD Speed Test

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October 23, 2013 2:12:35 PM

I have three Crucial 256 M4 D2 SSDs. One is my OS and programes. One is my audio/video and the last is for rendering videos. I ran a standard read/write test on all thee SSDs. When a test is done does it matter how much of the SSD is used? My C:SSD is 39% full and my audio/video SSD is 30% full and my render SSD is 4% full. The fastest test for read/write turned out to be the render SSD. The other two were were about the same but a little slower then the render SSD. Also one test was for QD=32, what does that mean??

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a c 906 G Storage
October 23, 2013 2:48:32 PM

Queue depths are requests for drive access. This is an imports benchmark for servers mainly. Single users might not ever exceed 6.

SSD dont typically experience slowdowns with how full they are like harddrives do because there is no platter or read write heads. So until an SSD usually maintain their steady state performance until they are 80+% full. They use some of their own space to perform maintenance tasks such as garbage collection which is why this happens.

I suspect C: is the slowest because its in use the most by various OS tasks, like superfetch, followed by your A/V drive with your render drive being used the least (because there's nothing on it).
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October 23, 2013 6:50:42 PM

popatim said:
Queue depths are requests for drive access. This is an imports benchmark for servers mainly. Single users might not ever exceed 6.

SSD dont typically experience slowdowns with how full they are like harddrives do because there is no platter or read write heads. So until an SSD usually maintain their steady state performance until they are 80+% full. They use some of their own space to perform maintenance tasks such as garbage collection which is why this happens.

I suspect C: is the slowest because its in use the most by various OS tasks, like superfetch, followed by your A/V drive with your render drive being used the least (because there's nothing on it).


Thanks for taking time to reply and the above help...

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