Though upgrades from V4R4, V4R5, and V5R1 to V5R4 are not supported, the following upgrades are supported:
One way to migrate your Directory Server server is to upgrade to an interim release (V5R2 or V5R3), then to V5R4. For detailed information about i5/OS installation procedures, see Software Installation . Follow the following steps to perform the migration. Schema changes should be migrated automatically. After each installation, verify that the schema changes are still present.