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Properly detect changes to hardware after adding a node

Orion does not properly detect changes in the number or configuration of storage volumes. If we increase the size of a volume that is near full capacity, the increase in volume size is not discovered and we continue to get alerts even though the volume has sufficient space. There also seem to be issues in detecting changes to network interfaces. The current solution is to delete the node and recreate it, which drops all the historical data for performance.