Promise Vtrak Eclass Speeds over XSAN

We just added a Promise Vtrak Eclass RAID to our XSAN, and for some reason the speed just doesn't seem right to me. We are getting high 200's / low 300's for the AJA tests. I've seen threads on here showing much faster speeds. (in the 500MB/s range)

Here is some info on our setup:
We have 2 intel xserves.
2 Q-logic SanBox 5600 switches.
3 new MacPro 2.93 ghz octos running leopord.
- using 2 port 4GB fiber cards
All running XSAN 2


It has been suggested that we would need to use a 4 port card on the clients to achieve faster speeds.

Any thoughts?

thanks


moody glasgow
smoke/flame