IBM i Operating System and Version Management

When should we upgrade our IBM i version?

Upgrade when support timing, target Power hardware, security requirements, third-party software compatibility, or application modernization makes the current release a constraint.

Answer

The decision should be planned around the full stack: IBM i release, PTF groups, firmware, HMC, ISV products, backups, application testing, and rollback. A version upgrade is safest when it is treated as a controlled project, not routine maintenance.

Back to IBM i Operating System and Version Management

More IBM i Operating System and Version Management Questions

What is the AS400 operating system called today?

The modern operating system name is IBM i. AS400 operating system searches usually refer to the same lineage that started as OS/400, later became i5/OS, and is now...

What belongs in an IBM i upgrade dependency inventory?

A useful inventory covers every dependency that can block the cutover.

Related Reading

IBM i Operating System Versions Guide

How to compare IBM i operating system versions, release support, Power 10 and Power 11 compatibility, and upgrade readiness before a hardware move.

AS400 Version Upgrade Planning Checklist

A practical AS400 and IBM i version upgrade checklist covering release support, PTFs, ISV software, testing, licensing, backup, and rollback.

IBM i Operating System Versions Guide

How to compare IBM i operating system versions, release support, Power 10 and Power 11 compatibility, and upgrade readiness before a hardware move.

IBM i Upgrade Dependency Inventory

A deeper upgrade-planning guide for IBM i teams building the dependency inventory that decides whether a Power 10 or Power 11 migration is ready.