VHD virtual disk limitations

Although VHD files do provide some significant flexibility, such as enabling the ability to create snapshots and move virtual machines from host to host, they do carry some limitations:

  • Change from Windows Server 2008 to Windows Server 2008 R2. You can no longer mount a VHD from within a compressed folder. This capability was removed from R2 in order to prevent potential VHD corruption.
  • You can only mount VHD files that reside on NTFS volumes. If you’re using differencing disks, all of the VHD files in the chain must be on NTFS volumes. For most organizations, this shouldn’t be much of a limitation.
  • The maximum size of a VHD file is 2040 GB, just shy of 2 TB.
  • If you intend to use a VHD file as a boot file for a Windows 7 desktop, make sure you understand that only the Windows 7 Enterprise and Ultimate edition support booting from VHD.

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