This technical paper describes the types of DUP dependencies and how they are executed using SUU.
There are two kinds of dependencies: pre-requisites and co-requisites.
Pre-requisites are the mandatory requirements while co-requisites are the requirements that must be completed for enabling certain optional features of the device being updated. For example, the pre-requisite dependency of BIOS DUP 5.0 is BIOS DUP 4.0. Here, SUU must apply BIOS DUP 4.0 first and then apply DUP 5.0. DUP 5.0 has co-requisite dependency on iDRAC 2.0. Here, you can choose to apply iDRAC 2.0 if necessary.