Date: Tue, 21 Apr 2009 10:43:30 -0700 From: Chuck Swiger <cswiger@mac.com> To: Mel Flynn <mel.flynn+fbsd.questions@mailing.thruhere.net> Cc: freebsd-questions@freebsd.org Subject: Re: Preventing ntpd from adjusting time (backwards) Message-ID: <C397BD04-8E91-4849-BB8F-A2034F10C18E@mac.com> In-Reply-To: <200904211106.01965.mel.flynn%2Bfbsd.questions@mailing.thruhere.net> References: <200904211106.01965.mel.flynn%2Bfbsd.questions@mailing.thruhere.net>
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Hi, Mel--
On Apr 21, 2009, at 2:06 AM, Mel Flynn wrote:
> Some coarse reading of ntpd(8) and ntp.conf(5) doesn't lead me to
> believe it's
> possible to make ntpd *not* adjust the time. With adjust I don't
> mean the skew
> operation, but really change the time.
Perhaps I've missed it elsewhere in this thread, but I don't believe
anyone actually answered the original question, which would be to use:
-x, --slew
Slew up to 600 seconds.
Normally, the time is slewed if the offset is less than the
step
threshold, which is 128 ms by default, and stepped if
above the
threshold. This option sets the threshold to 600 s,
which is
well within the accuracy window to set the clock
manually.
[ ... ]
It should be surprising that your clock would jump by 6 seconds. Do
you have adequate upstream timesources (ie, at least 4) configured, is
your local HW clock busted somehow, or are you doing something odd
with power-savings mode or running in a VM or something...?
Regards,
--
-Chuck
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