[ntp:questions] Re: Toggling time sync between two servers

Terje Mathisen terje.mathisen at hda.hydro.com
Sun Mar 26 14:39:17 UTC 2006

Richard B. Gilbert wrote:
> You can set up an NTP server with a hardware reference clock (a GPS 
> timing receiver) for a minimal cash outlay.  Like so:
> 1. A Sun Ultra 10 (used, <$100 on e-Bay)  I'd recommend a minimum of 
> 256MB of RAM.  I have a 440MHz processor but it's not required; any 
> supported processor should do the job.
> 2. An ATA/EIDE disk drive =>10GB.  You may well have something suitable 
> lying around.  $80 will buy you a new 80GB drive.
> 3. A Motorola Oncore M12+T or M12MT GPS reciever with "evaluation board" 
> for around $200 from Synergy Systems.
> 4. Solaris 10 Media kit ($40 from Sun).
> 5. NTP 4.2.0 or 4.2.1.  Free.

Using a discarded PC (with FreeBSD) + maximum $100 for a Garmin GPS18LVC 
+ a 9-pin serial connector and a USB cable (used to get +5V power) works 
equally well for this purpose, and it is even cheaper! :-)

Use whatever you feel comfortable with!


- <Terje.Mathisen at hda.hydro.com>
"almost all programming can be viewed as an exercise in caching"

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