esm module and ntp problem

JP Vossen vossenjp at netaxs.com
Mon Jan 13 14:39:01 CST 2003


On Mon, 13 Jan 2003, Brian Smith wrote:

> Very interesting. Did your backup take 2057 seconds to complete?

No, 5139 seconds for the backup and 4395 for the verify.


> Is the system really off by that amount of time or is the ntpd wrong?

It's really off by that much, so NTP dies.  Search the achive of this list
for ntpd -d output from 2 weeks ago.  It's:
	Time OK
	Time OK
	Time OK...
	Time WAY off, NTP dies.


> Is 2057 seconds an even multiple of the number of seconds it took for the
> backup to complete?

No, but 2057 is only this week's offset:

zgrep sanity ../messages*
../messages:Jan 13 07:00:49 drake ntpd[11379]: time correction of 2057 seconds exceeds sanity limit (1000); set clock manually to the correct UTC time.
../messages.1:Jan  6 07:00:47 drake ntpd[28213]: time correction of 2049 seconds exceeds sanity limit (1000); set clock manually to the correct UTC time.
../messages.2:Dec 30 06:57:24 drake ntpd[30782]: time correction of 2044 seconds exceeds sanity limit (1000); set clock manually to the correct UTC time.
../messages.3:Dec 23 06:59:10 drake ntpd[566]: time correction of 2041 seconds exceeds sanity limit (1000); set clock manually to the correct UTC time.
../messages.4:Dec 16 06:36:40 drake ntpd[19639]: time correction of 1036 seconds exceeds sanity limit (1000); set clock manually to the correct UTC time.


> Something seems to be pausing the clock on the system.

Certainly seems like it.  And it seems like it's afio or the IDS stuff, but...


> Try creating a script to echo the date/time to a log file during the backup
> every 10 seconds or something.

How would that differ substantivly from NTPd -d?


> Try to cat /proc/interrupts and see if the clock interrupt slows down or
> stops (I can't imagine this occurring).

Not quite sure what you mean here.


By the way, the backup is afio (with lots of ugly shell script wrapped around)
to an IDE On-Stream DI-30 on /dev/hdd, with a CD-ROM (not in use) on hdc.  See
the following for somewhat out-of-date details:
http://www.jpsdomain.org/linux/OnStream_DI-30-RedHat_Backup_mini-HOWTO.html)


Thanks for thinking about this,
JP
------------------------------|:::======|--------------------------------
JP Vossen, CISSP              |:::======|                jp at jpsdomain.org
My Account, My Opinions       |=========|       http://www.jpsdomain.org/
------------------------------|=========|--------------------------------
"The software said it requires Windows 98 or better, so I installed
Linux..."




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