I suggest adding a ramp-up time parameter that can be used to prevent the rate testing from occurring until the ramp-up time has passed. This will more accurately model the throughput capacity of streaming systems that have a pre-load buffer to ride over the initial cache warm-up period. Greg. p.s The rate stuff is working on Windows now - thanks Bruce. -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html