Seting the hardware clock

Shantanu Mahajan freebsd at dhumketu.cjb.net
Wed Jul 16 12:44:12 PDT 2003


+-- stan [freebsd] [14-07-03 19:16 -0400]:
| ;m struggling with getting the hardware clock (BIOS clock) equal to the
| kernels time.
| 
| On my Linux boxes a utility called hwclock is run on the way down to
| synchronize the 2.
| 
| The problem I'm running into is that if the time on the system gets to far
| out of date for ntpd to bring it into synch, then I can update the kernels
| clock with ntpdate. But when I reboot the old incorrect time comes back.

	From the manual page of ntpdate

     -b      Force the time to be stepped using the settimeofday(2) system
             call, rather than slewed (default) using the adjtime(2) system
             call.  This option should be used when called from a startup file
             at boot time.
	
	Hope this helps.

	Regards,
	Shantanu

| 
| I ran into this during some software testing, that required setting the
| clock pretty far off of real time, and it was a PIA to get the machine back
| to the correct time.
| 
| How _should_ this be handled?
| 
| -- 
| "They that would give up essential liberty for temporary safety deserve
| neither liberty nor safety."
| 						-- Benjamin Franklin
| 
| ------------------------------


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