Re: Moving from AIX 5.2 to 5.3
- From: "Michael E. Thomadakis" <miket@xxxxxxxxxxx>
- Date: Thu, 9 Feb 2006 14:09:06 -0600
On Thu, 9 Feb 2006 scott_doyland@xxxxxxxxxxxxxxx wrote:
| Date: 9 Feb 2006 07:32:14 -0800
| From: scott_doyland@xxxxxxxxxxxxxxx
| Newsgroups: comp.unix.aix
| Subject: Re: Moving from AIX 5.2 to 5.3
|
|
| Michael E. Thomadakis wrote:
| > Hi all,
| >
| > we have a p690 which currently runs AIX 5.2 on a mirrored rootvg and I am
| > being pressed to move up to AIX 5.3.
| >
| > Can I install (or test install) AIX 5.3 first on one spare 73GB disk drive
| > that is available in our I/O drawer of the same machine? Can I do this while
| > the 5.2 system is still running? How could I do this?
| >
| > Can I have, in general, two or more versions installed on separate disks and
| > then boot off of any of these AIX versions at will? How could I go about doing
| > so?
| >
| > What is the difference of a preserve and an upgrade install? Can I ask the
| > preserve-install process to create JFS2 logical volumes for the rootvg and
| > maintain our local settings (networking and tunnables)?
| >
| > I am very concerned that some of the AIX5.3 parts (especially POE) may give us
| > trouble with the s/w we are running here. In that case after a 5.3 (upgrade or
| > preserve) install, how could I go back to our current AIX 5.2? I have taken
| > mksysb's on tapes of the current rootvg.
| >
| > Ideally, it would be nice to have multiple versions on different disks and
| > then boot off of the one you need to. We cannot partition our system to LPARs
| > though.
| >
| > I was lookign at the 'alternate disk install' but it seems that it copies the
| > current rootvg to another disk which subsequently makes the boot disk. Is this
| > functionality related / helpful in having AIX 5.2 and 5.3 bootable disks on
| > the same (unpartitioned) system?
| >
| > Any help will be very very much appreciated!
| >
| > Michael Thomadakis
| > SC/TAMU
|
| I have never done it, but maybe you can break the mirror on rootvg, ie
| just leave hdisk0 with rootvg on it and remove hdisk1 from rootvg.
|
| Then boot from the CD and choose to just install AIX 5.3 on hdisk1.
|
| That way perhaps you can have 5.2 on hdisk0 and 5.3 on hdisk1. And
| when you booted you 'd have to specify which disk to boot from.
|
| But personally I wouldnt do this on a live system.
|
| Also this wont allow you to upgrade from 5.2 to 5.3, just install a new
| 5.3 on hdisk1. This may be OK, but if you have apps installed in
| rootvg its not gonna be much use as you'd have to reinstall them all
| under 5.3.
|
| If you have a other VG's with apps data then Im sure with some messing
| about you can make these other VG's available to 5.3, probably using
| exportvg and importvg, ie exportvg from 5.2 and importvg to 5.3.
|
| You can only run 5.3 or 5.3 at any one time on the same system though.
|
| when you start to install the info on the screen tells you the
| difference between a preservation and migration, but you most likely
| want migration if you upgrade 5.2 to 5.3. If installing 5.3 from new
| choose 'new and complete overwrite' (this wipes everything from disk).
| migration will preserve all your settings, but I *think* a new and
| complete overwrite is needed to use JFS2 on rootvg, ie rootvg stays at
| jfs if a migrate is done.
|
| If you are concerned that 5.3 is gonna affect yuor software I suggest
| you have a test machine and test it out. Much better to do this than
| have a live problem and have to restore from a backup.
|
| But to restore you'd need your rootvg tapes and just boot from them,
| this will reinstall from the tapes, be aware you will also most likely
| want to have backups of non-rootvg VG's as well.
|
| I really think you need to do some testing on a test machine first
| before you try any of the above though.
|
| Regards,
| Scott
|
|
Scott,
thank you much for the detailed answer.
I was wondering if it is necessary to unmirror our rootvg first, and
how I could use the alt_disk_install to upgrade the rootvg to AIX 5.3 and
leave a copy of AIX 5.2 there. Is this doable?
Thanks a lot!
Michael
.
- References:
- Moving from AIX 5.2 to 5.3
- From: Michael E. Thomadakis
- Re: Moving from AIX 5.2 to 5.3
- From: scott_doyland
- Moving from AIX 5.2 to 5.3
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