libata-core.c have a line { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, for exclude usage of NCQ for non-NCQ (TCQ) device WD740ADFD-00NLR1 I have WDC WD740ADFD-00NLR5. It is the same device with the same problem. Please add it to exclude list. -- 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