Operating system migration

If you have the compiler installed on AIX® V5.3, you might want to migrate the operating system to AIX V6.1 or later to take advantage of the latest IBM® POWER® technology.

The compiler filesets are not OS specific and do not require migration if COBOL for AIX, V4.1 is installed on AIX V5.3 and the operating system is migrated to AIX V6.1 or later. If an OS specific fileset is required in the future for a higher level of AIX, it will be identified in an IBM Technical Note tied to the PTF that will add support for that version of AIX.

Remember: When an AIX V5.3 machine is migrated to AIX V6.1, the AIX V5.x C++ runtime fileset xlC.aix50.rte is uninstalled, and the AIX V6.1 C++ runtime fileset xlC.aix61.rte is installed from the AIX V6.1 install image. The service level of the AIX V6.1 C++ runtime on the install image might be different from the service level of the AIX V5.x C++ runtime on your machine before migration. This means that after an OS migration, all PTFs applied to the C++ runtime before OS migration are gone, and then have to be re-installed. If the AIX V6.1 C++ runtime is at a different version, you can download the latest runtime updates from Fix Central.