> I'm not sure what to do if this had been the only disk in the system. > Maybe if the eror reate exceed 100/minute, then dma is turned off > permanently? Turn off UDMA and you turn off cable side error protection, so if your error is caused by noise you just did the electronic version of a long walk off a short pier. Degradation policies for IDE are tricky things. Alan - 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