Installing the Base Operating System
There are multiple ways to install the AIX® base operating system.
The Base Operating System (BOS) installation program first restores the run time bos image, then installs the appropriate filesets, depending on your selections. The installation program automatically installs required message filesets, according to the language you choose.
If you require a minimal install, change the selections for the Graphics Software and the System Management Client Software to no in the More Options menu of the BOS menus. These options are the GRAPHICS_BUNDLE and SYSTEM_MGMT_CLIENT_BUNDLE fields in a Network Install bosinst_data resource. The Enable System Backups to install any system field is set to yes. This field is the ALL_DEVICES_KERNELS field in your bosinst_data resource. Performing a minimal install is only applicable for New and Complete Overwrite or Preservation installation methods.
If you are reinstalling on an older system, the DVD media can only be used to boot or reinstall on 64-bit systems. To determine if your system is a 32-bit system or a 64-bit system, run the prtconf command with the -c flag.
AIX Base media and AIX NIM
lpp_source created from Base media, include updates for
bos.rte* software. These packages are at the same V.R.M.F
(version.release.modification.fix) levels as the base operating system that is restored during an
operating system installation. They are also present on the media for the cases where the Base media
is used to upgrade a system already at the same version and release level; to a new modification or
fix level. It is recommended that you use either update media (or downloaded technology levels or
service packs) to do upgrades. To support upgrading a WPAR (Workload Partition) that is moving from
one system to another, the root parts of these updates are restored onto the system during an
operating system installation. The data is restored into
/usr/lpp/bos/<bos.rte_software_name>/V.R.M.F/inst_root directories. A new
command, /usr/sbin/cp_bos_updates, is called, and is also available for users to
run from the command line. If a system is installed from an
lpp_source without the
bos.rte* updates, running cp_bos_updates manually is required to
support upgrading WPARs. This command allows support for WPAR Mobility, and the
restwpar to restore a WPAR to a new system.
If you are performing a BOS installation or a
on a disk with multiple ports such as Multipath I/O (MPIO), the port must remain active for the
duration of the install.
For more information about the installation options, refer to bos_install_more_options.html.
The following installation methods are available on AIX:
- New and Complete Overwrite
- This method installs AIX 7.3 on a new machine or completely overwrites any BOS version that exists on your system.
For instructions on installing AIX 7.3 on a new machine or to completely overwrite the BOS on an existing machine, refer to Installing new and complete BOS overwrite or preservation.
- This method replaces an earlier version of the BOS but retains the root volume group, the
user-created logical volumes, and the /home file system. The system file systems /usr,
/var, /tmp, /opt, and / (root) are overwritten. Product (application)
files and configuration data stored in these file systems will be lost. Information stored in other
non-system file systems will be preserved.
For instructions on preserving the user-defined structure of an existing BOS, refer to Installing new and complete BOS overwrite or preservation.
- This method upgrades from earlier versions of the AIX BOS to AIX 7.3 (see the release notes for restrictions). The migration installation method is used to upgrade from an existing version or release of AIX to a later
version or release of AIX. A migration installation preserves
most file systems, including the root volume group, logical volumes, and system configuration files.
It overwrites the /tmp file system.
For instructions on migrating an existing version or release of AIX to a later version or release of AIX, refer to Migrating AIX.
|Installation Steps||New and Complete Overwrite||Preservation||Migration|
|Create file system /, /usr, /var||Yes||Yes||No|
|Create file system /var/adm/ras/livedump. If this file system does not exist, it is created during any method of installation.||Yes||Yes, if not present*||Yes, if not present*|
|Create file system /home||Yes||No||No|
|Install Additional Filesets||Yes||Yes||Yes|
|* The livedump file system is only created during preservation or migration installations if it does not exist. You can modify the file system by using a customized bosinst.data file with a livedump stanza.|
bos_*logical volume names), the multibos instance is accepted as a rootvg, and after the installation is complete, logical volume names are changed to the original names. It applies to both preservation and migration type of installations.