> Under ordinarily conditions, ntpd adjusts the clock in small steps > so that the timescale is effectively continuous and without > discontinuities. Yes, but upon boot, the ntpd startup script calls ntpdate to reset the clock immediately, in order to give ntpd less work to do. I believe FC has a setting called System Clock Uses UTC. If that's turned on, Linux and Windows will fight over the clock. Still, it shouldn't cause drift.