[CentOS] date differs permanent some 3450 sec.

Ross Walker rswwalker at gmail.com
Fri Mar 13 14:18:13 UTC 2009


On Mar 13, 2009, at 3:24 AM, "Helmut Drodofsky" <drodofsky at internet-xs.de 
 > wrote:

> Hi,
>
>
>
> the date jumps within 30 seconds to a wrong value. ntp service is  
> stopped at the beginning.
>
>
>
> Whereas hwclock seems more precise.
>
>
>
> [root at kerio ~]# service ntpd stop
>
> Shutting down ntpd:                                        [  OK  ]
>
> [root at kerio ~]# ntpdate 0.centos.pool.ntp.org
>
> 13 Mar 07:04:48 ntpdate[23003]: step time server 131.234.137.24  
> offset -3450.678273 sec
>
> [root at kerio ~]# hwclock
>
> Fri 13 Mar 2009 07:04:59 AM GMT  -0.014767 seconds
>
> [root at kerio ~]# date
>
> Fri Mar 13 07:05:02 GMT 2009
>
> [root at kerio ~]# date
>
> Fri Mar 13 07:05:14 GMT 2009
>
> [root at kerio ~]# date
>
> Fri Mar 13 08:03:01 GMT 2009
>
> [root at kerio ~]# hwclock
>
> Fri 13 Mar 2009 07:05:37 AM GMT  -0.083628 seconds
>
> [root at kerio ~]#
>
>
>
> /etc/ntp.conf is in original configuration.
>
>
>
> Remarks:
>
> - most of our servers run without X-Windows, this uses X-Windows and  
> Gnome.
>
> - the server runs kerio mail services. Even the original from kerio  
> configured VMWare server has had this behavior.
>
> - stopping of keriomailserver does not help
>
If your hwclock stores local time and your BIOS adjusts it for DST  
that would cause a 3600 second time difference or if your hwclock  
stores UTC and the BIOS adds an hour to that...

Turn off any BIOS DST adjust feature if it's enabled.

-Ross



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