I have installed ESXi 5.1 on my server.
And machine has 4x vertex 256GB SSD drives, wich on drive is hot sphere. (RAID 5)
I have installed a Virtual Machine Windows7 for testing.
There i downloaded a AS SSD Benchmark for disk speed testing.
It says Seq 900MB/s for read, thats ok
But only 34.03 for Write, that is really slow. i Cant understand what seems to be the problem.
here some pictures for the result
VM settings screenshot
VM performache graphfic