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VM migration from 2012 R2 to 2012 failed

Posted on 2013-11-11
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Last Modified: 2013-11-12
When I try to migrate a Generation 1 VM from 2012 R2 Host to a 2012 host, the migration fails. When I try to export/import, 2012 host is unable to locate the exported VM within the folder.

Is there no way to migrate a VM from a 2012 R2 host to 2012 host?

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Question by:Wangstaa
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by:Svet Paperov
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Microsoft has made some big changes in Hyper-V 2012 R2 and moving VMs via export/import from and to the oldest versions is not possible.

Windows Hyper-V 2012 & 8.1 Hyper-V Did Not Find Virtual Machine to Import http://blogs.technet.com/b/rmilne/archive/2013/10/22/windows-hyper-v-2012-amp-8-1-hyper-v-did-not-find-virtual-machine-to-import.aspx

What’s New in Hyper-V for Windows Server 2012 R2 http://technet.microsoft.com/en-us/library/dn282278.aspx
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by:Wangstaa
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Since the VMs on 2012 R2 are still in generation 1, is it possible to run them on 2012?
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by:Cliff Galiher
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Nope. It is a one way ticket. Even gen1 VMs, once on R2, cannot go back to 2012.
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by:Svet Paperov
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I am not sure but as I understood it should be possible to move 2012 R2 Gen1 VM back to 2012 but not by using export/import functions – just the VHD or VHDX file.
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by:Wangstaa
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Hi spaperov

Can you elaborate on that?
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Cliff Galiher earned 500 total points
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I would not consider that migrating a VM. But you can create a new VM on your 2012 server and then attach the virtual disk to the new VM. This is, for intents and purposes of VM management, a *new* VM though. The files, software, and settings will be preserved as long as they are all on the virtual disk, but all of the VM settings will need to be recreated, the virtual devices will appear as new to the OS, and other some things, like snapshots of you use them, will not properly make that move.

It is definitely not the same as migrating a VM. But in specific circumstances, it can let you preserve most of the virtual environment. That isn't guaranteed though.
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by:Wangstaa
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That worked under testing environment, thanks.
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