The Hardware Management Services (HMS) provides the necessary functions required for discovering, bootstrapping, and monitoring the hardware in a physical rack in the system. The HMS out of band agent runs on the management switch of each physical rack.
The HMS is an abstracted software mechanism that manages the physical hardware in the physical racks, such as servers and network switches. The HMS provides this abstraction to enable integration of supported hardware from different sources and give the SDDC Manager the capability to interact with the hardware. The HMS is only accessed through the SDDC Manager and is not visible to system administrators directly. With the HMS you can discover, bootstrap, and monitor the hardware by polling received hardware events and handling hardware state changes. The HMS obtains these hardware events and state changes from software plugins that hardware partners create and provide to work with their specific hardware.