Sorry I read the questions in the wrong order. You can't boot to the on board ports and still use the raid controller. In order to enable the raid controller it must disable the Sata controller.
I am re-configuring a PE1800. I have ordered the Dell/Adaptec SATA Raid card for it. Once installed can I boot from the on board SATA controller and use the SATA Raid card at the same time? Or is it all On board sata or all raid sata? If that is the case I would like to connect TWO SATA drives to the 2 on board controllers and run the OS there, I could mirror the drives from Windows on the two on board SATA ports, right? If I can use onboard and the raid sata at the same time, what would the bios setting for the SATA type be?  Right now the two options are something I forget, maybe normal or something like that, and "RAID"   thanks, Pete
Questions on PE1800 rebuild - Q1 Sata on board and Sata RAID at same time?