Upgrading to Version 4.3 From an Earlier Version

If you are installing AIX Version 4.3 on a machine that has AIX already installed, follow these steps:

1. Back up your system.
   1. To back up an AIX Version 3.1 system, follow the instructions in the Installation Guide for Version 3.
   2. To back up an AIX Version 3.2 system, follow the instructions in the AIX Version 3.2 Installation Guide.
   3. To back up an AIX Version 4.1 system, follow the instructions in the AIX Version 4.1 Installation Guide.
   4. To back up an AIX Version 4.2 system, follow the instructions in the AIX Version 4.2 Installation Guide.
2. Go to Installing BOS from CD-ROM or Tape.
3. Go to Customizing Your Installation.