Update for the NTP server project: the S ... / 2013-05-12

Update for the NTP server project: the SATA cables arrived and I managed to fit everything in the case. I think I removed and replaced the central fan in the case about 15 times, it is always in the way whenever anything happens in the front area of the 1U case. Ubuntu 12.04 LTS is now happily installing on a linux software raid.

Interestingly, when I copy the Ubuntu 12.04 LTS .iso to an USB stick as-is it boots and works fine, when I use usb-creator-gtk on an Ubuntu 10.04.4 LTS system with the Ubuntu 12.04 LTS .iso (amd64) it creates an USB stick which hangs during boot. I guess Ubuntu is also using isohybrid for .iso images now but usb-creator-gtk doesn't recognize those somehow.

Update: The ntp package from Ubuntu 12.04 includes no ATOM refclock support (refclock 22). So I removed the package again and built ntpd from sources, using the hints from LinuxPPS NTPD support on how to make sure the right timepps.h is available. The first tests look good:

# ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*xxxxxxxxxxxxxxx .PPS.            1 u   11   16  377   15.920   -2.472  35.941
 xxxxxxxxxxxxxxx .INIT.          16 u    -   64    0    0.000    0.000   0.000
+chime1.surfnet. 192.87.106.3     2 u   39   64  177   14.826   -1.898  28.043
+chime2.surfnet. .GPS.            1 u   30   64  177   18.103   -3.296   1.623
 PPS(0)          .PPS.            0 l    -   16    0    0.000    0.000   0.000

I have a rockwell jupiter gps board with PPS support available to test with.