Dell PowerEdge XR4000w Installation and Service Manual

The Witness node supports enhanced functionality for BMC-level management in the form of a host-specific package that is developed by Dell. This package, which is known as the Dell Operating System Agent for Witness (DOSA-W), was implemented to support both the heartbeat functionality defined in the Witness OS Agent HLD Spec (Witness specs) and the reporting of certain Witness host data back to the Chassis Manager. This data is then available to be used by a compute node as shown in Getting Witness host network information.