Software upgrade or replacement
Use this information to understand special considerations of the system and its software when you upgrade or replace an IBM® i release.
- Releases supported and system model information for IBM i upgrades
Upgrades to current releases require that you be at a certain level of software and hardware. This information shows the supported combinations for source and current target releases for software and also system model information in relation to IBM i. - Installation and IBM-supplied objects
When you replace your software with a new IBM i release, by default the system keeps changes that you made to some IBM-supplied objects. - Compressed objects and storage space
All of the licensed programs and some objects of the IBM i operating system ship in a compressed form. This requires less storage space on your system. The system decompresses objects according to certain criteria, which could affect the performance of the system. - Files that the system deletes during installation
If you have created logical files over IBM-supplied physical files in QSYS, the logical files will be deleted during the IBM i installation process.
Parent topic: Concepts for software installation