Richard B. Gilbert wrote: > > If the temperature of the machine has changed significantly since the > drift file was written, ntpd will start with an incorrect value for > drift. If you are doing a cold start, it is usually best to delete the > drift file. The drift file is overwritten with a new value every hour.
You would need a large temperature variation to justify this. If the devices were exposed to the elements it might be justified. It would rarely be justified if they were in living space. One consequence of deleting the file is that it forces a frequency calibration, which means that, once there are enough samples (about 6) to set the clock, it will be allowed to free run for about 15 minutes before having any further corrections applied. If you want a tight lock in less than 20 minutes, you need a drift file. _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
