Thank you for the explains concerning my post....
now, given that i have unfortunately found this problem ONLY with R3 Nas enterprise (specially with the version 5.0) and NEVER with the XSR Enterprise (specially with the version 3.0 bd. 1660-1666, for me the Open-e NAs with the highest performance that i have try so far!), i would to know if is possible that the "drivers" included in the R3 software for my NIC, aren't updates and offer low performance.

I trying NIC Intel Pro 1000 dual, PCI-X 64bit

Thanks much more