http://blogs.technet.com/jamesone/archive/2009/01/13/fun-and-games-with-vhd-files-in-the-new-oses.aspxOne of the new features for both Windows Server 2008 R2 and the Windows 7 client is support for Virtual Hard Disk files built into the OS. You can create fixed or dynamic disks and “attach” the tools for Hyper-V call this “mounting” a VHD and early stuffen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/jamesone/archive/2009/01/13/fun-and-games-with-vhd-files-in-the-new-oses.aspx#3182295Wed, 14 Jan 2009 14:09:47 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3182295Jon<p>What are the requirements to boot a VHD? ie. does there need to be an existing physical partition to store boot files?</p>http://blogs.technet.com/jamesone/archive/2009/01/13/fun-and-games-with-vhd-files-in-the-new-oses.aspx#3182462Wed, 14 Jan 2009 20:31:02 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3182462jamesone<p>Jon, yes a VHD is a file so it has to go in a partition somewhere. The partition which the bios boots from needs to have a 6.1 boot loader with the right Boot configuration database. </p>