The IBM Server Team tests servers using three different models: standard, comprehensive and enterprise testing.
Standard: A single instance of the hardware or software is installed in the system using normal installation methods. Related software, such as device drivers, are tested for their ability to load, initialize and bind reliably. A limited test is executed to demonstrate compatibility and data integrity (where applicable).
Comprehensive: Is a superset of "Standard". Where applicable, multiple instances (up to 3 when possible) are installed demonstrating scalability and configuration versatility; as well as showing that related software, such as device drivers, will load, initialize and bind reliably to multiple instances concurrently. Finally, a stress test, that tests for data integrity, of significant duration is executed on the multiple instance configuration.
Enterprise: A single-node server's slots are fully populated with the same adapter being tested with an uEFI operating system. Up to three instances of the same adapter are installed for testing with legacy mode operating systems. Both uEFI and Legacy mode configurations are tested to confirm that related software, such as device drivers, will load, initialize and bind reliably to multiple instances, of the same adapter, concurrently. Disclaimer: Installing the maximum instances, e.g. installing adapters in all slots of a multi-node server, may affect Performance.