Microsoft has recently released an add-in for Visio to help you build rack diagrams.
This tool auto-generates the diagram of your rack and provides clear server details from a linked Excel template. Analyze your racks and servers using WMI or get the utilization data over time using the Operations Manager connection.
Use the virtualization button to see the before and after detailed diagram of your racks. See clearly where you have the opportunity to save on space and power.