[CentOS] NTP and hardware clock
t004 at kbocek.com
Wed Oct 11 17:06:57 UTC 2006
Do you have the following lines in your /etc/ntp.conf:
server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 10
They identify your local clock as a low-stratum time server.
Dag Wieers wrote:
> I had the following problem today. Because of a misconfigured
> network switch one system suddenly didn't have any network.
> After a reboot (with the network still unavailable) NTPD refused to start.
> Most likely because the initial ntpdate failed to work. I find this
> troubling, because when the network was restored, NTPD could have resumed
> working (like I'd expect from a true daemon).
> Now, what was more peculiar was that the hardware clock was completely
> off. I also had assumed that somehow the hardware clock was kept in sync,
> but now after rebooting without network, the system clock was skewed.
> Is there some way to:
> + Make ntpd run, even when no ntp-server could be contacted
> + Make ntpd synchronise the hardware clock automatically
> PS Yes, I know I can run ntpdate from cron or run hwclock to synchronize
> my hardware clock. But shouldn't this be part of the infrastructure
> (either ntpd or the initscripts) ?
> Maybe this is useful to have fixed upstream, but I prefer to hear second
> opinions before trying to be smart :)
> Kind regards,
> -- dag wieers, dag at wieers.com, http://dag.wieers.com/ --
> [all I want is a warm bed and a kind word and unlimited power]
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