Messages in this thread | | | Date | Fri, 19 Nov 1999 20:08:06 +0100 | From | Harald Koenig <> | Subject | Re: updating the RTC automagically |
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On Nov 19, Richard B. Johnson wrote:
> The time-keeper (32kHz temperature-compenstated piezoelectric resonator) > in the RTC is much more stable than the CPU clock, which in recent > boards isn't even a quartz crystal, it's a cheap barium titanate > "Ceramic resonator".
sorry but that's pure theory! I've seen quite some main boards where the system clock was pretty good (most likely just by acident;) and the RTC had frequency errors of (much) more than 100ppm...
> I don't think the you should set the RTC from the kernel except during > the following once-a-day crond script.
that only depends on which quartz oszilator is worse -- you have to gamble;)
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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