The clock tag has no wiki summary.
16
votes
2answers
849 views
What is the largest hardware clock update the Linux kernel “11-minute mode” can make?
When certain time-related programs (like ntpd) are running on a Linux system, the kernel will switch into so-called "eleven minute mode" (see the hwclock man page) whereby it will automatically update ...
5
votes
2answers
197 views
What is the clock frequency inside 10Gb and 100Gb Ethernet cards?
As I understand, a 10Gb Ethernet card is capable of putting 10Gb every second on (say) a fibre optics cable. Now naively, for this to happen in hardware, one will need a 10GHz clock running the ...
5
votes
3answers
346 views
Clock is 10% faster than normal
I'm having some strange problem with the clock on my server – it's about 10% faster than normal.
The problem started 2 days ago and I've not done anything special with the server.
I tried to turn of ...
5
votes
3answers
217 views
Dell T710 time issue, clock loses time every day
I have a Dell T710 here at work that for some reason will not keep proper time. Its a dual quadcore with 32GB ram and runs Windows 2008 R2. Instead of Having multiple servers we run a few virtual ...
4
votes
2answers
2k views
Why does Ubuntu 9.04 reset my Windows clock?
I've got a rig with 2 hard drives. I've put Ubuntu 9.04 (Jaunty) on one of the drives and Windows Vista SP2 runs on the other drive. I went with this approach rather than dual boot since I wanted to ...
4
votes
3answers
1k views
Server clock running too slow
The system clock on my dedicated server is running too slow. Every month it loses about 2 minutes.
The details are: Cent OS, Linux version 2.6.9.
How can I resolve the problem, is there any way to ...
4
votes
6answers
3k views
ESXi VM NTP Server
We need to setup an internal NTP server.
Because this server will pretty much ONLY be a time server I was thinking of just creating a VM for it.
However, Googling around it appears that there there ...
4
votes
2answers
146 views
how to cause linux system datetime to run faster than real world datetime?
Background
I want to monitor a running linux system over several days. It's a custom gentoo build and with much custom software on board. This software has ongoing maintenance timers and cron ...
4
votes
1answer
114 views
How do I make all Xen guests use their host clock value?
I've set up Xen server under Linux with several guests running, and all was well. After some time I've noticed the clock on the server drifted away, so I installed 'ntpd', and the clock was back to ...
3
votes
5answers
2k views
Excessive clock drift on AMD Athlon prevents ntpd from synchronizing clock
I've got an AMD Athlon XP-2500+ host (Shuttle MN31 motherboard, nForce 2 IGP + MCP-T chipset) running 32-bit Ubuntu 9.10 (i686 2.6.31-20-generic kernel). Unfortunately, it appears that the clock drift ...
3
votes
3answers
5k views
How do I stop the clock running fast on a virtualbox client running ubuntu 8.04?
I'm having a problem with the clock running fast in Ubuntu 8.04 server (2.6.24-24-generic kernel) running in VirtualBox 3.04.
It's drifting quickly, something like 5 minutes per hour.
I think it was ...
3
votes
2answers
340 views
CentOS 5 clock running twice as fast
The system clock on a CentOS 5 install is running twice as fast as it should. The hardware clock is fine, and when I run a ntp sync, it resets to the correct time. But within 2 minutes, it is already ...
2
votes
4answers
327 views
Anybody tried to use graphic card as a precision clock on a Windows server?
I am thinking (constantly) how to make my server be synchronised better than it is. I run some cheap app which syncs me with some stratum 2 server on the colo and drift is about 1-2 ms per 10 sec ...
2
votes
4answers
663 views
Best way to say “sync all system clocks to this server, when and ONLY when I say so?” Mixed setup of Windows+Linux servers
Title pretty much explains it. Let's say there's 100 servers, various versions of Windows and Linux, and one Windows server is the "master clock." I did look at this question:
How do I synchronize ...
2
votes
3answers
1k views
Why would a Windows 2003 server clock reset during a reboot?
After a reboot the windows time reset itself to 26 March 2007. This meant it could not connect to any other servers in the domain. We have set the time to the correct value but we are having ...
2
votes
5answers
1k views
NTP failing to update
I am attempting to use ntp on the server.
Checking ps the ntpd process seems to be running:
ntpd -u ntp:ntp -p /var/run/ntpd.pid -g
However the time is not being corrected, any ideas?
The drift ...
2
votes
2answers
224 views
Windows Time management: Domain Time II a neccessary product?
I ask as I have become part of a network where they have w32 time disabled on machines, and use Domain Time II. Product info here: http://www.greyware.com/software/domaintime/
Just curious if anyone ...
2
votes
3answers
1k views
VMware: How to keep time in guest after suspend
I have Gentoo installed as guest OS. I have hardware clock synced with host system, but the clock of OS tend to be wrong after suspend.
The only solution I find out is run hwclock -s frequently via ...
2
votes
1answer
173 views
changing timezone affects cron time
I have set up a cron to run at every 26th minute.
$ crontab -l
26 * * * * date > /home/time.txt 2> /home/time_err.txt
The current time shown by date command.
$ date
Thu Aug 25 23:26:00 CDT ...
1
vote
2answers
9k views
WS2008 NTP - Using time.windows.com,0x9 - Time always skewed forwards
I have a domain controller configured to use time.windows.com (with 0x09 flags set). I've noticed that frequently the systems' clock is fast - it varies from 10 minutes to even 45 minutes. I always ...
1
vote
4answers
416 views
Getting time to sync with NTP on Centos 5 VM
My Centos 5 VM is drifting time.
I have scoured different answers to solve this problem.
I've looked at the VMWare's tips and added tinker panic 0 on top of my ntp.conf file. I also changed the ...
1
vote
2answers
210 views
Seemingly high clock skew between four systems, normal?
I'm researching a bit of a problem maintaining time synchronization between systems. I finally decided to measure the actual clock variance between hosts, and found that over the course of 13 hours, ...
1
vote
0answers
158 views
Busy Debian server (Xen guest) seems to go to sleep (energy saving mode)
I have a Debian 6 Xen guest that seems to go to sleep from time to time. Randomly, it just stops to answer to any network requests (HTTP, ssh, ping) and only resumes activity when we log on the ...
1
vote
2answers
440 views
Virtual PC: Issues with clock when guest Linux has a different timezone to the host OS
I'm running Linux (Centos) under Virtual PC in Windows 7.
Guest is set to a different time zone then host OS and none of them are UTC.
The issue is that when guest boots its time is always set to ...
1
vote
1answer
577 views
How do I troubleshoot root cause of a hung windows (2003) server?
I have a pair of Windows (2003 Server) servers both running MS SQL Server (2008 EE) that each hang every few months. This has been occurring intermittently :( for the past 15 months pretty much since ...
0
votes
3answers
366 views
Email shows time 1 hour ahead of server time
I have a dedicated linux server.
On plesk it shows the correct local time on the server. However, for all the emails on the server for some reason show the time + 1 hour in outlook.
See screenshot ...
0
votes
4answers
525 views
ntpdate shows 4second time drift / day
I started ntpdate running every night as a cronjob (on two servers). And every morning I have an email telling me the outcome. On one server it's correcting by about 0.8 seconds every day, which seems ...
0
votes
1answer
322 views
Disconnect Local Clock from Domain Controller Clock
How can I disconnect my workstation clock from the domain controller?
In other words, I do not want them synchronized.
0
votes
1answer
112 views
How to set hwclock to UTC?
The times on my arch linux workstation got messed up, so I set the system time with date and then the hardware time with
sudo hwclock --systohc --utc
Now the hwclock gives:
Do 04 Apr 2013 ...
0
votes
2answers
340 views
SW clock drift problem
i got a problem: my linux software clock seems so have a big drift. In order to correct this (and to make ntpd work) I ran adjtimex. And adjtimex "meassured" a drift over -1700s/day and corrected this ...
0
votes
1answer
478 views
How time is affected by the ntpd and /etc/localtime
Can anyone explain how ntpd and /etc/localtime and system clock interact with each other, in UNIX or more specific in freeBSD?
I'm giving the following long description of the concepts in case I ...
0
votes
2answers
4k views
Changing system date & time in OpenSuse 11.1
Opensuse 11.1 date command shows:
# date
Wed Dec 23 11:43:27 EST 2009
And I want to change it to current date i.e. July 29 00:50:12 2009. The command I am using to do that is
# date -s "29 July ...
0
votes
2answers
112 views
Hardware multipliers
Can someone explain the different system multipliers? I know this is a base clock (a.k.a the System clock) then there is a multiplier for the Front side bus (FSB), RAM module, maybe for the RAM ...
0
votes
1answer
58 views
KVM guest clock sync with host
I'm running KVM w/ centos 6.x.
My guest vm clocks are booting with a 1-2 second lag from their host. My clocksource for the host is ntp. My clocksource for the guest is "kvm-clock", but I need to ...
0
votes
0answers
131 views
FreeNAS 8.0.4 time freeze
I have a problem with my FreeNAS-8.0.4-RELEASE-x64. We did the upgrade from Windows server 2008 for the file system and so far we have been impress of the results. One bad problem is that randomly the ...
0
votes
1answer
251 views
Upgrade to Squeeze on KVM VM causes clock problems
So I have this VM (I don't have access to the host system) running Debian Lenny, with the following kernel: 2.6.32-bpo.5-686 #1 SMP
This morning I upgraded the VM to Squeeze (finally), and as the ...
0
votes
2answers
126 views
Why does my system clock differ across services?
I have my system clock set to UK time, which is currently +0100 (BST)
I set this by symlinking the localtime file, as follows
/etc/localtime -> /usr/share/zoneinfo/Europe/London
The date ...
