Hello from Gregg C Levine normally with Jedi Knight Computers
Haven't we been beating this issue over the head with gaffi sticks far
too long? What about adapting the concepts of NTP for the whole process.
A message came through earlier which commented that the Cisco routers
that live on a correspondent's network, get their time of day settings
from the government's own services. And provided the settings for his
NTP services entry. You would then need to install the xntp package, but
where to find it, for each distribution, outside of Slackware, I would
not know.
-------------------
Gregg C Levine [EMAIL PROTECTED]
------------------------------------------------------------
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> -----Original Message-----
> From: Linux on 390 Port [mailto:[EMAIL PROTECTED]] On Behalf Of
> Dennis G. Wicks
> Sent: Monday, January 14, 2002 3:29 PM
> To: [EMAIL PROTECTED]
> Subject: Re: VM and Linux time of day
> 
> Haven't been in the machine room in a while, eh George?  ;-)
> 
> The last time I remember seeing a physical TOD enable switch was
> back around 1975! On the 9672 and the 3090 they are selections
> from some screen on the HMC and it is done so seldom that even
> the CE doesn't know right where it is!
> 
> Good idea though. Now if we could microcode duct tape!
> 
> 
> 
> 
> 
> 
> 
> George Haeh <[EMAIL PROTECTED]> on 01/14/2002 02:00:44 PM
> 
> Please respond to Linux on 390 Port <[EMAIL PROTECTED]>
> 
> To:   [EMAIL PROTECTED]
> cc:    (bcc: Dennis Wicks/infosvcs/CDG)
> Subject:  Re: VM and Linux time of day
> 
> 
> 
> 
> 
> A possible hardware fix would be a duct tape job on the TOD Enable
switch
> -- or maybe the
> CE could by-pass the switch.  I doubt there's much, if any, current
draw
> when the switch
> is closed.
> 
> Any IBM hardware folks care to commment?
> 
> George Haeh
> 416-465-2292
> [EMAIL PROTECTED]
> 
> ----- Original Message -----
> From: "Dennis G. Wicks" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Monday, January 14, 2002 1:47 PM
> Subject: Re: VM and Linux time of day
> 
> 
> > Greetings;
> >
> > I think this subject has gone around several times already.
> >
> > The VM time server is only a solution as long as you are isolated
> > from the Rest Of the World. When you start talking to systems
outside
> > your LAN you really should be synching all of your system clocks
> > to UTC (See: http://www.time.gov/about.html ) This makes it much
easier
> > to troubleshoot related events. From experience, as little as 9
seconds
> > difference in time makes troubleshooting difficult, 90 secs can make
it
> > impossible!
> >
> > I think this is a necessary addition to the S/390; the ability to
set the
> > system clock programatically without having to IPL and not having to
> > manually
> > enable the operation. I know there are clever ways to do this by
> > manipulating
> > the time zone in VM but that really isn't a practical solution. The
time
> > needs
> > to be checked frequently and adjusted as needed so all systems are
as
> close
> > to
> > being on the same tick as possible. The software for doing this has
been
> > available for PCs and other HW for quite some time and could
probably be
> > quickly
> > ported to z/VM and z/OS if the mechanical problem were out of the
way.
> >
> > Good Luck!
> > Dennis
> >
> >
> >
> >
> >
> >
> >
> > Aria Bamdad <[EMAIL PROTECTED]> on 01/14/2002 08:07:24 AM
> >
> > Please respond to Linux on 390 Port <[EMAIL PROTECTED]>
> >
> > To:   [EMAIL PROTECTED]
> > cc:    (bcc: Dennis Wicks/infosvcs/CDG)
> > Subject:  Re: VM and Linux time of day
> >
> >
> >
> >
> >
> > On Fri, 11 Jan 2002 17:02:16 -0600 Dennis G. Wicks said:
> > >Greetings;
> > >
> > >Linux will set its clock like any well behaved system. If you can
and
> > >want to you can set up the usual ntp (Network Time Protocol)
functions
> > >and synchronize your linux machines time to the rest of the world.
This
> > >requires internet access, which is where the "can" comes in. Or you
can
> > >get the time from a time server on your lan.
> > >
> > >Unfortunately, VM and OS can't do this yet. Unless something has
been
> > >quietly added in z/VM. I think there is a time server available,
but I
> > >haven't investigated it.
> > >
> >
> > There is a time server available for VM.  It is free to download at
the
> > VM web site www.vm.ibm.com under the download directory.   I have
been
> > using it to set the time on other systems at my organization and it
works
> > well.
> >
> > Aria
> >
> >
> >
> >
> > >As for the difference between your VM host and the linux guest
there are
> > >many possibilities. Choose whether to synchronize to VM or to ROW,
> > >use a date command to set your linux clock and be happy! ;-)
> > >
> > >Good Luck!
> > >Dennis
> > >
> > >
> > >
> > >
> > >
> > >Jean Bedard <[EMAIL PROTECTED]> on 01/11/2002 03:16:46 PM
> > >
> > >Please respond to Linux on 390 Port <[EMAIL PROTECTED]>
> > >
> > >To:   [EMAIL PROTECTED]
> > >cc:    (bcc: Dennis Wicks/infosvcs/CDG)
> > >Subject:  VM and Linux time of day
> > >
> > >
> > >
> > >
> > >
> > >Hi,
> > >
> > >I'm a bit confused here. I thought Linux (SuSE Linux in this case)
took
> > the
> > >date and time from VM (or from the hardware), but now I realize
that on
> my
> > >zVM 4.2 system, CP QUERY TIME is currently about 90 seconds ahead
of the
> > >results of the Linux "date" command. How can it be?
> > >--
> > >* Jean Bedard
> > >* VM System Manager             S.I.T., Universite Laval
> > >* [EMAIL PROTECTED]     (418) 656-2131 ext. 4014

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