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Yes you can do it like you described, you don't need to export and import VMs.<br />
But when you will doing this, these 8 VMs will be powered off. Or you can present LUN from one server to another and run all VMs on one server until second server is up and running.
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Yes you can do it like you described, you don't need to export and import VMs.
But when you will doing this, these 8 VMs will be powered off. Or you can present LUN from one server to another and run all VMs on one server until second server is up and running.

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Currently I have 2 Server 2008 R2 ENT Hyper-V servers. &nbsp;I have about 8 VMs running on each of them. &nbsp;I also have an EMC VNXe 3100. &nbsp;Each Hyper-V server has a LUN connected to it and that is where the VHD files live. &nbsp;My question is can I &quot;detach&quot; the LUN from Hyper-V server &quot;A&quot;, format that server and install Server 2012. Install Hyper-V, and then re-attach the LUN, and spin the VMs back up? &nbsp;I guess my question is are the VMs themselves migratable? &nbsp;Do I need to &quot;export and import&quot;, or can I just reattach, reconfigure the RAM, PROCs, NICs, etc, and spin up?<br />
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Thank you
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Currently I have 2 Server 2008 R2 ENT Hyper-V servers.  I have about 8 VMs running on each of them.  I also have an EMC VNXe 3100.  Each Hyper-V server has a LUN connected to it and that is where the VHD files live.  My question is can I "detach" the LUN from Hyper-V server "A", format that server and install Server 2012. Install Hyper-V, and then re-attach the LUN, and spin the VMs back up?  I guess my question is are the VMs themselves migratable?  Do I need to "export and import", or can I just reattach, reconfigure the RAM, PROCs, NICs, etc, and spin up?

Thank you

Server 2012 Hyper-V from Server 08 R2

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

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.

Virtualization

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.