Hi mccowger,
Thanks for your answer, yes I understand all of what you've listed...I only turned these options off to see if there was any effect and am well aware that the CX3 is not supported/quite old now.
My point is that I appear to have improved the performance by forcing the HP blades to 4Gb, I'm now getting 8000 IOPS.
I wondered if anyone could shed some light as to why this may have this effect. Running the whole fabric at 4Gb isn't ideal as the P2000 shares it.
Cheers