first of all, my Config:
ES.2 500GB*4 for 1st raid-0 SN06 firmware
7200.11 320GB*2 for 2nd raid-0 SD2B firmware
ICH9R, Driver 188.8.131.523
OS Vista x64, Win7 x64
I build those raid back in 2008, with driver 8.8, no problem at , speed is great. that ES.2 raid-0 easily give me over 300MB/s STR. After I had update to latest driver 8.9 set, I experience serious slow down, I had rebuild the raid servial time, reinstall OS, no different. At the last minutes before I go back to Hardware raid, I do complete benchmark test with different stripe size and write back cache setting again.
The result is funny, with driver 8.9 it will become under 230MB STR when using 128K, and if I reduce the stripe size, the performance is back, and max at about 4~32K, I am using 4K stripe size and give me 250~320MB in ATTO. for Write back cache, if I enable it , the 4K stripe will slow down to about 120MB~150MB STR and under 100MB for write, it doesn't matter what is the stripe size, just enable it then it will slow down.
Feel strange? me too, I don't know this is due to the new Seagate Firmware problem or Intel driver bug, anyway, problem solve.
Sorry that I don't have the benckmark result photo, as It is really painful to find a place to backup over 2TB data, I had completely forget to save it. If anyone really want some benchmark result photo, I can do some test with the smaller 7200.11 at weekend.