From: Green, Simon (SGreen@KRAFTEUROPE.COM)
Date: Tue Nov 12 2002 - 05:12:50 EST
Four hours was for migration to 4.3.3, plus maintenance to level 8.
However, I'd missed the fact that you were using tape. I've never cloned a
system using CDs with a different version of AIX to that of the mksysb tape;
I'm not sure if it would work.
Just to make sure I understand what's happening, you are:
Moving the system from an F50 to some other system, (unspecified).
Upgrade from AIX 421 to 433.
Apply maintenance to level 8.
If I were doing this, I would adopt a slightly different approach to the one
you're doing.
My first option:
0. Backup system. (Nearly forgot that!)
1. Upgrade existing system on F50 to AIX 433
2. Apply maintenance to level 8, (or 10, perhaps).
3. Backup system.
4. Clone system onto new server, using AIX 4.3.3 CDs.
5. Start applications.
Second option, which is potentially much safer.
1. Backup existing system.
2. Clone system onto new server, using AIX 4.2.1 CDs.
3. Upgrade new server to 4.3.3.
4. Apply maintenance to level 8.
5. Backup new server.
6. Start applications.
The second option offers two key advantages.
First, provided you don't hook it up to the network you can do a complete
dry-run of the upgrade, leaving the existing system running. This will help
you iron out any problems and get accurate timings for everything.
Second, you can abandon the process very easily and go back to the old
system if things don't go to plan.
I'm assuming that your applications and all of their executables etc are on
external disk, so that you can just unplug from one system and plug it into
the new one. If you've got to migrate data that may complicate matters.
Assuming this is correct, then depending on the applications and what use
they make of /var and other rootvg filesystems you may be able to leave the
applications running right until the very end, then stop them and move the
date. I've done this sort of thing myself and simply update selected home
directories over the network. ("tar -cvf - /home/whoever | rsh new_server
tar -xvf - ".)
Simon Green
Philip Morris ITSC Europe
AIX-L Archive at http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
AIX FAQ at http://www.faqs.org/faqs/aix-faq/
N.B. Unsolicited email from vendors will seldom be appreciated.
> -----Original Message-----
> From: Ron Bramblet [mailto:bramblet@FULLER.COM]
> Sent: 11 November 2002 18:46
> To: aix-l@Princeton.EDU
> Subject: Re: Migrating from 4.2.1 to 4.3.3
>
>
> Simon,
> I did not go into all of the steps but it looks like there
> are several reboots.
> I have instructions from P21 and they say to reboot at least
> 4 times in the
> migration from 4.2.1 to and including the Maintence Level update.
>
> When you say 4 hours is that including the migration or
> everything. P21 told me
> that the migration (because it is on tape) could take 4 hrs itself.
>
> "Green, Simon" wrote:
>
> > I would say that you should apply the maintenance as well;
> there are fixes
> > for problems which could stop your system from running. I
> don't see any
> > reason to take a system backup after the basic 433 upgrade;
> do it after the
> > maintenance is on.
> >
> > These upgrades don't normally take all that long, depending
> on what filesets
> > you have installed already. I think four hours might be sufficient.
> >
> > You will need to reboot the server after the update. It
> might be worth
> > rebooting after the upgrade to 433, then again after the
> maintenance, but
> > you should be OK to do just the one at the end.
> >
> > > -----Original Message-----
> > > From: Ron Bramblet [mailto:bramblet@FULLER.COM]
> > > Sent: 11 November 2002 15:39
> > >
> > > I have a RS/6000 7025-F40 machine that is currently
> running AIX 4.2.1
> > > and Prophet21.
> > > As Systems Admin I have been tasked with the upgrade of
> this machine.
> > > P21 has chosen the software and also the hardware. I have
> all of that
> > > ready. My boss was under the impression that P21 would do
> all of the
> > > upgrade. I talked to T/S from P21 and they told me no it
> > > would be me to
> > > do the upgrade.
> > >
> > >
> > > Are there any known issues that I need to look for when doing this
> > > migration?
> > > I have notes from Prophet21 on how to do it but I was curious
> > > if someone
> > >
> > > else had done the migration / update and if there are
> issues I need to
> > > look for.
> > >
> > > Here is the basic steps as I understand it.
> > >
> > > 1) P21 Backup and AIX backup
> > > 2) Migration of current version via tape to 4.3.1
> > > 3) At least an AIX backup here. (Do I need to do the P21
> > > Backup here
> > > also?)
> > > 4) Upgrade of System to 4.3.3 via CD-ROM
> > > 5) AIX Backup here (Do I need to do P21 Backup here also?)
> > > 6) AIX Maintenance Level 08 Update.
> > > 7) P21 and AIX Backup
> > >
> > > Can I stop after step 4 if I run out of time? Or do I need to
> > > finish it
> > > all.??
> > > Any comments will be greatly appreciated. I have done an
> upgrade to
> > > another version of UNIX server but not AIX.
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