I currently have a problem with a WD Velociraptor 300GB to be installed on a ASUS K8V Deluxe motherboard. This drive is not seen as a SATA drive when trying to install XP on it. I have tried to install this on all 4 SATA ports. The error message I get is either bios not installed or no operating system installed. This drive is not seen at all in the bios. I have installed Raptors on this motherboard in the past with no problems at all. Did WD change something or maybe I'm doing something wrong. I tried putting a jumper across 5 and 6 to limit speed from 3.0 to 1.5. Also I tried putting a jumper across 1 and 2 to disable SSC. The drive is a model WD3000HLFS .I would also try this drive with a PCI SATA 3.0 card if it would help. I haven't tried messing with the bios yet, but I may have to. A friend hooked this drive up as a USB drive and was able to write and read files from it. I have a total of 4 drives installed on this system. A 500GB WD drives on primary and secondary SATA. A Raptor on SATA1 and a 1TB drive on SATA2. The 1TB drive has a jumper limiting it to 1.5. I tried removing the jumper and the same problem as when I try the 3.0 Raptor. The system will not boot and the error message about no bios installed pops up. If I jumper pins 5 and 6 on the 3.0 Raptor this should take care of this problem but it doesn't. So apparently this jumper either has no effect or I have a problem with the bios. I'll call WD and see what they say about the jumper.