Hi Gr-R, Thank you for your reply, we just test the iscsi volume performance to see what it can be used for.
the hardware configuration is:
Supermicro motherboard X7DCX
4*2GB DDR2 physical memory, speed is 667 MHz (1.5 ns)
LSI SAS 3081E-R
Intel Dempsey/San Clemente/ICH9, Intel(R) Xeon(R) CPU E5405 @ 2.00GHz
2*1GB physical network adapter
Thanks again!