http://blogs.technet.com/b/puneetvig/archive/2011/05/21/5nine_2D00_hyper_2D00_v_2D00_manager_2D00_2.aspxVHD tool is an unmanaged code command-line tool for instant creation of large fixed-size VHDs. Usage VhdTool.exe /create <FileName> <Size> [/quiet] VhdTool.exe /convert <FileName> [/quiet] VhdTool.exe /extend <FileName>en-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)