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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LEARN ABOUT OSF1
volrootmir
volrootmir(8) System Manager's Manual volrootmir(8)
NAME
volrootmir - Mirror areas necessary for booting to a new disk
SYNOPSIS
/usr/sbin/volrootmir [-a] [nconfig=count] target_disk [swap=target_partition]
OPTIONS
Specifies that all volumes on the system disk be mirrored, not just the root and swap volumes, rootvol and swapvol.
DESCRIPTION
The volrootmir script causes a mirror copy of areas of the root disk involved in booting to be made on the specified target disk.
When used without the -a option, volrootmir adds mirrors of the root and swap volumes and allocates them on the new disk. In addition, all
disk regions required for booting are set up and partitions for the new volume mirrors are created.
When used with the -a option, volrootmir mirrors all in-use partitions on the system disk.
To mirror a swap volume that is on a separate disk from the root volume, the swap attribute must be used to specify a separate target for
the swap mirror.
The target disk(s) must be at least as large as the sum of the sizes of rootvol and swapvol. Also, the physical disk should not have any
disk partition in use.
This script can be called from the voldiskadm menus by choosing the Mirror volumes on a disk operation.
ATTRIBUTES
Specifies the number of log copies and copies of the configuration database, for example, nconfig=2. Specifies that the swap volume,
swapvol, be mirrored on a separate disk, as specified by target_partition.
EXAMPLES
The following command mirrors the rootvol and swapvol volumes onto the target disk, dsk3. This command will fail if swapvol is on a differ-
ent disk from rootvol.
# volrootmir dsk3 The following command mirrors rootvol, swapvol, and any other volumes on the root disk onto the target disk, dsk3.
This command will fail if swapvol is on a different disk from rootvol.
# volrootmir -a dsk3 The following command mirrors rootvol on disk dsk3, swapvol onto partition dsk7d, and any other volumes on the
root disk onto disk dsk3. This command will fail if swapvol is on the same disk as rootvol.
# volrootmir -a dsk3 swap=dsk7d The following command mirrors rootvol onto disk dsk3 and swapvol onto partition dsk7d. This command
will fail if swapvol is on the same disk as rootvol.
# volrootmir dsk3 swap=dsk7d
SEE ALSO
volintro(8), voldiskadm(8)
volrootmir(8)