1. __VME computers*__ (__RIO2__, __RIO7__): This box shows you whether the VME computers are online, i.e. if they can be reached from __Bumblebee__.
2. __Readout*__: This box shows the status of the readout, i.e. the event builder on __Bumblebee__ and the two `drasi` instances running on the two VME-computers. The `2/2` means that both nodes are running. The event builder broadcasts the data such that we can attach onto it and save it to a file.
3. __Relay__: The relay is a `ucesb` instance that attaches to the event builder's data stream and fans it out to several data streams. This also validates the data, i.e. if it crashes, the data may be corrupt. The relay provides data to, among others, the online analysis. So if the relay dies, so does the online analysis. The relay is *NOT* responsible for the data taking or recording, and is thus non-essential.