> I tried word 78 bit 5(Hardware Feature Control) which does not work, > it is 0 on my HDD sample with log 30h page 08h and DevSlp supported. > > Seems that word 78 bit 5 is only the sufficient condition, not the > essential condition. Do you guys have suggestion? Eventually I received the confirmation from the DevSlp HDD vendor, bit 5 should be and will be set in production drives with log 30h page 08h supported. So I will submit a patch to use it instead. Hi Jeff, I don't know when I will receive some production drives to verify my patch, are you okay if I submit my patch first without testing so as to meet kernel 3.7 bug fix window? Thanks, Shane -- 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