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I recently migrated a SBS2008 server to 2012 R2 as a Hyper-V VM. &nbsp;The migration went fine and all is well with the new server.<br />
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I've already migrated FSMO roles, uninstalled Exchange (they don't use Exchange) and demoted the server.<br />
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I now want to install 2012 R2 Hyper-V server on the old box to serve as a temporary host in the event of hardware failure on the current physical server. &nbsp;My question is as follows: &nbsp;The new server has 1 TB of storage provisioned as a virtual hard disk for the VM. &nbsp;The server is only using 200 GB of that right now. &nbsp;The old server only has 500 GB of space total. &nbsp;Will I be able to bring the VM up on the older server with less disk space as long as total in use on new server doesn't exceed the 400 or so GB I can allocate on the old server?<br />
<br />
Thanks in advance.
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I recently migrated a SBS2008 server to 2012 R2 as a Hyper-V VM.  The migration went fine and all is well with the new server.

I've already migrated FSMO roles, uninstalled Exchange (they don't use Exchange) and demoted the server.

I now want to install 2012 R2 Hyper-V server on the old box to serve as a temporary host in the event of hardware failure on the current physical server.  My question is as follows:  The new server has 1 TB of storage provisioned as a virtual hard disk for the VM.  The server is only using 200 GB of that right now.  The old server only has 500 GB of space total.  Will I be able to bring the VM up on the older server with less disk space as long as total in use on new server doesn't exceed the 400 or so GB I can allocate on the old server?

Thanks in advance.

Hyper-v Standby Server

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.

Windows Server 2012

Hyper-V is a native hypervisor; it can create virtual machines on x86-64 systems and supersedes Windows Virtual PC as the hardware virtualization component of the client editions of Windows NT. A server computer running Hyper-V can be configured to expose individual virtual machines to one or more networks. Hyper-V Server supports remote access via Remote Desktop Connection. Administration and configuration of the host OS and the guest virtual machines is generally done over the network.

Hyper-V

Microsoft Virtual Server was a virtualization solution that facilitated the creation of virtual machines on the Windows XP, Windows Vista and Windows Server 2003 operating systems. Virtual machines are created and managed through a web-based interface that relies on Internet Information Services (IIS) or through a Windows client application tool called VMRCplus. Features included Linux guest operating system support, Virtual Disk Precompactor, symmetric multiprocessing (SMP), x64 host operating system support, the ability to mount virtual hard drives on the host machine and additional operating systems support, including Windows Vista, and a volume shadow copy writer.