Poor Performance on FC Target Mode

[sebase]

Hi all!

Recently I established a storage box and install the Open-E DSS V6 trial edition. The storage box was composed of:
1*Intel Xeon E5504 CPU,
2*2GB DDR3-1066 ECC+REG SDRAM,
1*Adaptec 5805 RAID controller with 8*Seagate Cheetah 15K.7 300GB SAS derviers in RAID 5 array,
1*Qlogic QLE2562 dual-port 8Gb FC HBA.
On this box I created 2 LUs, one for OS installation, while the other for performance test.
Another server was connected to the created LUs with a Qlogic QLE2560 single-port 8Gb FC HBA. They were connected with the Brocade 300 switch. Windows Server 2008 R2 Enterprise was installed to the first LU. Then I tested the transfer rate of the second LU by HDTune. The average rate is only about 120MB/s. I copied a file of 2GB from the first LU to the second LU, and the speed shown is also about 100MB/s.
My question is whether this is the real performance of my system, or should I do something to optomize the storage system?
Thanks!

[symm]

have you tried to go point to point with the FC?

[sebase]

have you tried to go point to point with the FC?

Because i'd like to use this system for multiple servers/initiators environment in future, I have not tested PTP mode. Thanks for your advice, and I will try it.