The sata_mv driver does not use interrupts for PIO, which is why it's working (slowly) when you disable DMA. The original problem remains.. interrupts are not getting back to the CPU from the 6081 chip. Dunno why. I'm on holiday right now. :) -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html