[Quote] pciide1 at pci0 dev 14 function 0 "NVIDIA MCP73 AHCI" rev 0xa2: DMA (unsupported), channel 0 wired to native-PCI, channel 1 wired to native-PCI [end quote]
The AHCI implementation on your mb is not supported by the version of OpenBSD you are using. That, or it is configured to something other than true AHCI by the bios. I'd suggest checking to see if you have mode options for it in your bios and see if that moves it from being a wd? drive (driven by pciide) to a sd? drive (driven by the AHCI driver)
