Re: [CentOS] Strange NTP problem

2008-05-22 Thread Jason Clark
I had a similar problem on a different server that I fixed last night. Evidently it had a BIOS level feature that tried to modify the CPU clock rate, much like cpu-freq does within the kernel, and was doing so by messing with the system clock impacting the RTC. I was drifting all over the place u

Re: [CentOS] Strange NTP problem

2008-05-22 Thread Alfred von Campe
I'm still having this issue. Here is another update. I noticed that the drift file for the system with the problem contained "0.000". On most other systems this contains a positive number (and on two a negative number). I deleted the drift file, resynch'ed the time with "ntpdate ", rest

Re: [CentOS] Strange NTP problem

2008-05-21 Thread Alfred von Campe
On May 21, 2008, at 0:55, Paul Heinlein wrote: Yeah, with an offset of 54 seconds, it's a bad system. :-) Try this (assuming 10.101.32.104 is your preferred local NTP server): service ntpd stop echo "10.101.32.104" > /etc/ntp/step-tickers service ntpd start Adding a server to the step-t

Re: [CentOS] Strange NTP problem

2008-05-20 Thread Paul Heinlein
On Tue, 20 May 2008, Alfred von Campe wrote: Bad system: # ntpq -np remote refid st t when poll reach delay offset jitter == 10.101.32.104 67.128.71.65 3 u 689 1024 3770.659 54095.7 4

Re: [CentOS] Strange NTP problem

2008-05-20 Thread Filipe Brandenburger
On Tue, May 20, 2008 at 8:53 PM, Alfred von Campe <[EMAIL PROTECTED]> wrote: > # ntpq -np > remote refid st t when poll reach delay offset > jitter > == > 10.101.32.104 67.128.71.65 3 u 689 1

Re: [CentOS] Strange NTP problem

2008-05-20 Thread Alfred von Campe
On May 20, 2008, at 20:25, Filipe Brandenburger wrote: What is the output of "ntpq -np" ? You should have a line with a star (*), otherwise it is not synchronizing. Start running NTP again, wait for half an hour and issue that command to see what your output is. It could be a problem related to

Re: [CentOS] Strange NTP problem

2008-05-20 Thread Alfred von Campe
On May 20, 2008, at 16:56, Paul Heinlein wrote: A slew of 5 min/24 hrs should be in the range of fixable. If the NTP daemon was doing its job :-). This is very suspect. Are there any SELinux or other log messages suggesting that ntpd isn't able to write to its drift file? Your local clock

Re: [CentOS] Strange NTP problem

2008-05-20 Thread Filipe Brandenburger
On Tue, May 20, 2008 at 3:46 PM, Alfred von Campe <[EMAIL PROTECTED]> wrote: > I have 30 identical Lenovo desktop systems running CentOS 5.1. On one of > those systems the clock is running slow (5+ minutes from yesterday to this > morning and another minute since this morning) despite the fact tha

Re: [CentOS] Strange NTP problem

2008-05-20 Thread Paul Heinlein
On Tue, 20 May 2008, Alfred von Campe wrote: I have 30 identical Lenovo desktop systems running CentOS 5.1. On one of those systems the clock is running slow (5+ minutes from yesterday to this morning and another minute since this morning) despite the fact that NTP is running on all of them a