Now I know why the Windows Experience Index does not work, when you boot from VHD: SSD 1048 MB/s write and 1193 MB/s read?

If I boot from a VHD file and run the ATTO benchmark on my Vertex 3 OS SSD.

I get the following results: 1048 MB/s write and 1193 MB/s read. Well the Vertex 3 SSD is the fastest SSD I worked with, but this can’t be right.

 

BenchmarkVertex3BootFromVhd

 

When the ATTO benchmark is run from a normal booted system, I get the following results: 503 MB/s write and 557 MB/s read on my DELL XPS L702.x. That’s what I suspected.

 

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When I benchmark a normal HDD I get: 69 MB/s write and 69 MB/s read.

 

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