I am trying to add a Maxtor 200GB SATA/150 drive to an existing machine to use as storage space. The machine already has three IDE hard drives, controlled by a PCI controller card because of the 137GB limitation. My optical drives are using the on-board IDE channels. I'm trying to add the SATA drive to the motherboard's on-board SATA slot. However, the drive is not detected in the BIOS. Windows Device Manager also lists the following error message for the VIA SATA RAID Controller (my motherboard's on-board SATA): "This device cannot start. (Code 10)" Why might this problem be ocurring? I have the driver for the on-board SATA properly installed, as well as the latest BIOS revision. The configuration of my system's drives are as follows: OnChip IDE: Primary Channel: Lite-On DVD Writer (Master) Secondary Channel: Benq DVD Writer (Master) Promise Ultra100 TX2 IDE Controller Card (PCI): Primary Channel: Western Digital Caviar SE 160GB (Master, Boot), Western Digital Caviar SE 80GB (Slave) Secondary Channel: Western Digital Caviar SE 160GB (Master) One thought I had - might the on-chip SATA controller be conflicting with the IDE controller card I have in the PCI slot?