VM fails to start in Hyper-V server

sglee
sglee used Ask the Experts™
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DC1 VHDX FileDC1 VM SettingsDC1 CheckpointDC1 Start ErrorError when entering DC1.vhdx in Virtual Hard DiskI have Windows HyperV Server 2012R2 with a virtual machine "DC1". This morning, during windows server backup, the building lost power.
When electricity was returned, DC1 VM failed to start stating that it was missing DC1_69E13A45-C913-43CA-887F-1D3481F975B8.avhdx file. But I could not find that avhdx anywhere on the hard drive. Since DC1.vhdx does exist, I tried to replace DC1_69E13A45-C913-43CA-887F-1D3481F975B8.avhdx with DC1.vhdx, but it fails.

Can I just click "Remove" button in the DC1 VM Settings screen?
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Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
Since the snapshot was created during a Windows Server Backup VSS snapshot, create a new VM shell, bind the existing .VHDX file, boot, clean-up networking, reboot. Done.
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
Veeam is free for under 10 VMs. I suggest going that route.

Author

Commented:
@Philip,

 Are you suggesting "reboot"? I have done that multiple times, but to no avail.
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Technical Architect - HA/Compute/Storage
Commented:
In Hyper-V Manager:
 1: Create a new VM shell
 2: Bind the existing .VHDX file
 3: Boot the VM
 4: Console in
 5: Clean-up networking
 6: Reboot the VM
 7: Done

Author

Commented:
Basically you want me to created a new virtual machine and point the hard drive to an existing DC1.vhdx, right?
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
That is correct.

Author

Commented:
I will try it and report back.
What does REMOVE button do? Will it accomplish the same?
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
The existing VM has the snapshot associated with it.

Just start with a fresh VM shell.

And get a better UPS system.

Author

Commented:
Can I delete existing VM name "DC1" and create a new one with the same name?

Author

Commented:
@Philip
I created a new virtual machine "DC", pointed the hard disk to existing DC1.vhdx, started new VM and OS came up.


Thank you for your help!
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
Yes, once the replacement is in production you can delete the old VM.

Welcome. :)
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
And ... get a better UPS setup that can shut down your host. :)

Author

Commented:
get a better UPS setup that can shut down your host. -->  will definitely do that.
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
We have a number of SMT1500 and up series APC units with the network management card installed. It's important to put a server grade, sine wave specific, UPS system behind a server or set of servers.

Author

Commented:
Thanks for "SMT1500"  recommendation and that's is what I typically install for servers.
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
Awesome.

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