05-28-2014
Quote:
Originally Posted by
tde3000
I have this weird notion that upgrading the TL does not cause the machine to wipe, but upgrading a major version (from aix 6 to 7) means it's actually a fresh install and will wipe the date and i have to install the software again (TSM server, for instance).
This is definitely not the case. A TL update and a version update differ only in scope (of the replaced OS software), but not in principle.
Having said this, a fresh install when updating to a new version might be a good idea, because you have the opportunity to "clean up" the system. But it is not mandatory at all.
Quote:
Originally Posted by
tde3000
Trying to google it, i came across references to migration vs upgrade, and hoped maybe i can upgrade my server to aix 7 while keeping all installed software, but dind't find any further explanation.
A "migration" (or "alternate disk migration") works like this (principle only): You have a system with 2 (mirrored) rootvg disks. You break the mirror so that you have two independent copies of your rootvg. One of these is used to do the update (or fresh install). Then you have the opportunity to test everything. Once you are finished testing you remirror again, either booting from the old disk (this would wipe out your update and reinstate what you had) or booting from the updated disk (this way destroying the old version).
The gain is: at every time you have a working copy of a known-to-work configuration and you can step back and start over at any time should anything not work as expected. Google for "alternate disk install" or "alternate disk migration". Related searches would be "multibos": basically several versions/configurations residing side by side, similar to a multiboot PC.
I hope this helps.
bakunin
This User Gave Thanks to bakunin For This Post:
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HOME(8) System Manager's Manual HOME(8)
NAME
home, 40meg, 80meg, personalize, update, Disclabel - administration for local file systems
SYNOPSIS
gnot/home
gnot/personalize
gnot/update
magnum/home
magnum/personalize
magnum/update
pc/40meg
pc/80meg
pc/personalize
pc/update
nextstation/home
nextstation/update
DESCRIPTION
These programs help maintain a file system on a local disk for a private machine.
Home partitions a disk, copies the appropriate kernel to the disk, and makes a new file system on the disk. To do this, it overwrites the
vendor-supplied software on the disk with a copy of Plan 9. 40meg, 80meg, and 100meg configure disks and make file systems for disks of
the appropriate size.
Update copies the current kernel to the disk and updates files on the local file system. It only updates those files put there by the home
program.
Personalize removes the contents of the /usr directory on the local disk and copies a minimal set of files for the user who runs the com-
mand.
The file /rc/bin/nextstation/Disclabel, despite its name, is not an rc(1) script. It contains the second stage bootstrap program for
Nextstations booting from local disk. Before booting a Plan 9 Nextstation from disk, it should be installed in the partition
/dev/hd1label; this is normally done by nexstation/home.
FILES
/lib/proto/portproto
Mkfs prototype files for magnum/home, magnum/update, gnot/home, and gnot/update.
/lib/proto/386proto
Mkfs prototype files for pc/40meg, pc/80meg, and pc/update.
SOURCE
/rc/bin/gnot/*
/rc/bin/magnum/*
/rc/bin/pc/*
/rc/bin/nextstation/*
SEE ALSO
kfs(4), mkfs(8), prep(8), wren(3)
``Installing the Plan 9 Distribution''.
HOME(8)