A migration is when you install Identity Manager 4.0 on a new server, then migrate the existing data to this new server. Follow the Section 4.0, Basic Identity Manager System Checklist to verify that the installation is complete.
The advantage of performing an upgrade is that there is minimal downtime for the drivers. The disadvantage is that it requires new hardware.
If you are performing a migration, proceed to Section 14.0, Performing a Migration.