I'm intending to add a "precision" (well, precision to the Pi world) RTC to my Pi 3 to use for a holdover source when it hasn't got PPS from the GPS module.

On 31/10/2017 10:04 PM, Chris Caudle wrote:
On Tue, October 31, 2017 7:19 pm, MLewis wrote:
...the "better" quality RTCs seem to be DS3231 based
How does one translate that into an expected 24 hour holdover?
For the RTC, or for an NTP server?  If the NTP server is running it will
not make a difference, modern operating systems do not use the RTC for the
system clock, only to get close to the correct time at startup.


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