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Operating Systems AIX Upgrading to AIX 7 vs migrating Post 302903493 by bakunin on Wednesday 28th of May 2014 04:31:37 AM
Old 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
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pfinstall(1M)						  System Administration Commands					     pfinstall(1M)

NAME
pfinstall - tests installation profiles SYNOPSIS
/usr/sbin/install.d/pfinstall -D | -d disk_config [ -c CDpath] profile DESCRIPTION
After you create a profile, you can use the pfinstall command to test the profile and see if it does what you want before using it to install or upgrade a system. pfinstall enables you to test a profile against: o The system's disk configuration where pfinstall is being run. o Other disks by using a disk configuration file that represents a structure of a disk. See NOTES on how to create a disk configuration file. To successfully and accurately test a profile for a particular Solaris release, you must test a profile within the Solaris environment of the same release. For example, if you want to test a profile for Solaris 2.6, you have to run the pfinstall command on a system running Solaris 2.6. So, on a system running Solaris 2.6, you can test Solaris 2.6 initial installation profiles. However, if you want to test a Solaris 2.6 upgrade profile on a system running a previous version of Solaris, or if you don't have a Solaris 2.6 system installed yet to test Solaris 2.6 initial installation profiles, you have to boot a system from a Solaris 2.6 CD image and temporarily create a Solaris 2.6 install envi- ronment. Then, you can run pfinstall in the Solaris 2.6 install environment to test your profiles. To create a temporary Solaris 2.6 install environment, boot a system from a Solaris 2.6 CD image (just as you would to install), answer any system identification questions, choose the Solaris Interactive Installation program, and exit out of the first screen that is presented. Then, from the shell, you can execute the pfinstall command. OPTIONS
The following options are supported: -c CDpath The path to the Solaris 2 installation image. This is required if the image is not mounted on /cdrom. (For example, use this option if you copied the installation image to disk or mounted the CD-ROM on a directory other than /cdrom.) -d disk_config pfinstall uses a disk configuration file, disk_config, to test the profile. See NOTES on how to create a disk configuration file. You must specify either this option or the -D option to test the profile (see WARNINGS). This option cannot be used with an upgrade profile (install_type upgrade). You must always test an upgrade profile against a system's disk configura- tion ( -D option). -D pfinstall uses the system's disk configuration to test the profile. You must specify either this option or the -d option to test the profile (see WARNINGS). OPERANDS
The following operands are supported: profile The file name of the profile to test. If profile is not in the directory where pfinstall is being run, you must specify the path. EXAMPLES
Example 1: Testing an Upgrade Profile The following example tests an upgrade profile, upgrade.prof, on a system with a previous version of the Solaris software installed. 1. Boot the system to be upgraded from the Solaris image chosen for the upgrade, just as you would to install. The image can be located in the system's local CD-ROM or on an install server. 2. Answer the system configuration questions, if prompted. 3. If you are presented with a choice of installation options, choose the Solaris Interactive Installation program. 4. Exit from the first screen of the Solaris Interactive Installation program. After the Solaris Interactive Installation program exits, a shell prompt is displayed. 5. Create a temporary mount point: example# mkdir /tmp/mnt 6. Mount the directory that contains the profile(s) you want to test. If you want to mount a remote NFS file system (for systems on the network), enter: mount -F nfs server_name:path /tmp/mnt If you want to mount a UFS-formatted diskette, enter: mount -F ufs /dev/diskette /tmp/mnt If you want to mount a PCFS-formatted diskette, enter: mount -F pcfs /dev/diskette /tmp/mnt 7. Change directory to /tmp/mnt where the profile resides: example# cd /tmp/mnt 8. Test the upgrade.prof profile: /usr/sbin/install.d/pfinstall -D upgrade.prof Example 2: Testing the basic.prof Profile The following example tests the basic.prof profile against the disk configuration on a Solaris 2.6 system where pfinstall is being run. The path to the Solaris CD image is specified because Volume Management is being used. example# /usr/sbin/install.d/pfinstall -D -c /cdrom/cdrom0/s0 basic.prof Example 3: Testing the basic.prof Profile The following example tests the basic.prof profile against the 535_test disk configuration file. This example uses a Solaris CD image located in the /export/install directory, and pfinstall is being run on a Solaris 2.6 system. example# /usr/sbin/install.d/pfinstall -d 535_test -c /export/install basic.prof EXIT STATUS
0 Successful (system rebooted). 1 Successful (system not rebooted). 2 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWinst | +-----------------------------+-----------------------------+ SEE ALSO
fdisk(1M), prtvtoc(1M), attributes(5) Solaris 10 Installation Guide: Basic Installations WARNINGS
If the -d or -D option is not specified, pfinstall may perform an actual installation on the system by using the specified profile, and the data on the system may be overwritten. NOTES
You have to test a profile on a system with the same platform type for which the profile was created. SPARC To create a disk configuration file (-d option) for a SPARC based system: 1. Locate a SPARC based system with a disk that you want to test. 2. Create a disk configuration file by redirecting the output of the prtvtoc(1M) command to a file. example# prtvtoc /dev/rdsk/c0t3d0s2 > 535_disk 3. (Optional.) Concatenate disk configuration files into a single file to test a profile against multiple disks. The target numbers in the disk device names must be unique. example# cat 535_disk 1G_disk > mult_disks x86 To create a disk configuration file (-d option) for an x86 based system: 1. Locate an x86 based system with a disk that you want to test. 2. Create part of the disk configuration file by saving the output of the fdisk(1M) command to a file: example# fdisk -R -W 535_disk /dev/rdsk/c0t3d0p0 3. Append the output of the prtvtoc(1M) command to the disk configuration file. example# prtvtoc /dev/rdsk/c0t3d0s2 >> 535_disk 4. (Optional.) Concatenate disk configuration files into a single file to test a profile against multiple disks. The target numbers in the disk device names must be unique. example# cat 535_disk 1G_disk > mult_disks To test a profile with a specific system memory size, set SYS_MEMSIZE to the specific memory size (in Mbytes) before running pfinstall: example# SYS_MEMSIZE=memory_size example# export SYS_MEMSIZE SunOS 5.10 28 Jan 2003 pfinstall(1M)
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