Point well taken but I just didn’t stick anything into my machine. My system is per avid specs straight from the website. As I said, HP 8200 dual 3.20, 2 G ram, NVidia FX1300 gx card, ADS PYRO PCI 64 second FW card for ext FW drives. MY sata drives are Seagate 250G 7200.8, 7200RPM sata drives striped raid 0. The controller card is a PROMISE Fasttrak 150 TX4. It is located in slot 5 on it’s own bus segment. The more I hear about it, the promise card may be the culprit. I’m not sure the drives are the issue. If I understand you correctly, seagate 7200 RPM drives with are not fast enough DV25411? Also, there are quite a few sucessfully using internal sata arrays on both forums.