topic Re: System clock error in Operating System - Linux

System clock error

juno2 — Mon, 04 Aug 2003 05:03:30 GMT

I run RH8 on my server , the system clock always run faster than normal ( about 10 minutes per week ) , how can I fix it ? thx

Re: System clock error

Vitaly Karasik_1 — Mon, 04 Aug 2003 06:38:39 GMT

check http://users.dslextreme.com/~craig.lawson/linux_notes/clock.html#manual_assessment_of_drift

Manual Drift Assessment for the Hardware Clock

I hope it'll help you.

regards,
Vitaly

Re: System clock error

Cristian Draghici_1 — Mon, 04 Aug 2003 08:11:06 GMT

Better yet, rely on accurate time sources. Use NTP.

See http://www.tldp.org/HOWTO/TimePrecision-HOWTO/ntp.html

Cheers
Cristi

Re: System clock error

Jerome Henry — Mon, 04 Aug 2003 11:05:15 GMT

It seems that your problem is lasting since
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xacc568da2286d711abdc0090277a778c,00.html
It may be a hardware issue... So best solution would be ntp, as suggested (apart from changing BIOS battery).

Don't forget also that system tries to synchronise on reboot hardware time and system time, if one makes problem, then it may influence the other (kind of set time = time +1s process running somewhere). You mayn search for long before finding it... Try to observe anyway if this run happens during machine working time, machine idle time, or reboot...

hth

J

Re: System clock error

Steven E. Protter — Mon, 04 Aug 2003 12:02:25 GMT

My HP-UX boxes gain or lose 15 minutes a week if they aren't configured with ntp. One of mine once thought it was next week.

The real problem is that the ntp port is blocked on most networks. The second problem is the standard ntpd server that ships with Windows is NOT unix compliant.

If the port is open, use the links below to pick a time server. There is a good ntp client/server for nt in these links as well.

ntp was INVENTED by Dr. David Mills and I'm putting in his web site too.

http://www.eecis.udel.edu/~mills/

http://www.ntp.org/documentation.html

http://developer.novell.com/research/appnotes/1999/july/03/02.htm

http://www.tymserve.com/success_tva.html

http://www.endruntechnologies.com/ntp.htm

SEP

Re: System clock error

Huc_1 — Tue, 05 Aug 2003 12:29:52 GMT

Perhaps, if you have more then one Unix on your lan You could set one that run's accuratly as an ntp server and the lazy one as a client ?

just my 2 cent worth

As stated above a check to motherboard battery could also help

Jean-Pierre