There is a problem that it does not downgrade the IO if all you have is iCRC errors. The threshold is 10 events without other errors and it should skip you from ATA-66 to ATA-44. If you did not enable the tuning aspect of the chipset then do so now. Regards, Andre Hedrick CTO Timpanogas Research Group EVP Linux Development, TRG Linux ATA Development - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/