I tested some things:

Used a additional Reaktek GigaBit NIC, but the IOMeter read speed was only 7 MB/s and the write speed like the Intel NIC at 40 MB/s.

I tested with the multiprocessor and sigleprocessor testing kernels, but all the same...

I updated the Firmware of the 3Ware to the last one, but no change.

Some questions:

- What is the better enviroment: Direct links from the target to the initiator with a single cable or is it better to use a switch.

- Can i test the network performance from the initiator to the target and ignore the performance of the raid?

- What must i do to configure the NIC to 1000 FullDuplex fix, no autodetection.