I'm working in a new environment that makes heavy use of serial console servers for server management. They are augmented with switched PDUs for power management. They are not using the DRAC capabilities of the existing servers.
I'm adding new HP ProLiant equipment to the site, and am curious as to the benefits of serial consoles versus the ILO/ILOM/DRAC technologies available on modern servers. This is a Linux environment that will grow to include more Windows systems. I'll be running a mixture of blades and DL380's. Assume fully-licensed/enabled versions of ILO/DRAC on any future equipment.
I've configured serial consoles in the past, and have found them particularly useful for network gear. I'm confused as to their advantage or usefulness in an environment where the servers will have onboard lights-out management.