I just bought a new WD2500ks sata ii drive and plugged it into my mobo along with my current seagate sata 1 drive. I checked the device manager and I notice that the speed on the WD keeps getting downgraded to sata 1.5gb due to "errors" and if I bump it back up to 3.0gb it will eventually bump itself down again. I dont notice any errors writing or reading from the drive and I'm using the sata cable that came with the drive. Is the drive just bad or is there something else going on? My asus a8n-e mobo supports sata ii 3.0gb, so I'm not sure what it wrong. The mobo has the latest bios available and is using the latest chipset drivers from nvidia. Also, another odd thing is that the drive will show up and work in my system if I used the cable the drive came with, it's one of those that blocks the sata power port so that you have to use an old 4 pin power connector. If I plug the drive in using an sata cable that came with my mobo and plug one of the sata power connectors from my PSU to the drive, I can hear it spinning up but it won't show up in windows or in my bios. Any ideas? I just got the drive so I can return it and exchange if need be, not sure if I'm just missing something or if the drive is just bad.