Discussions specific to the Microsoft Hyper-V hypervisor
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rogerdu
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Re: 9.5 Hyper-V 2016 Known Issues

Post by rogerdu » May 16, 2019 5:00 pm

Annnnddd... Dynamic Disks... its all I'm gonna say. They're not supported for Production Snapshots...

One fixed, the customer wants to leave the other, so no Application Aware backups for you!

mb1811
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Re: 9.5 Hyper-V 2016 Known Issues

Post by mb1811 » Jul 24, 2019 1:54 pm 1 person likes this post

Veeam Case # 03676525

This case ist related to Server 2019 but it hits since Server 2016.

I call it the 9% Issue:
While perfoming a Snapshot via ANY backup tool, VM's get stuck in a state: "Creating Snapshot 9%"

https://social.technet.microsoft.com/Fo ... rum=ws2016

microsoft-hyper-v-f25/failed-to-create- ... 98-30.html

Hardly shutdown the VM's and reboot the Hyper-V host...

MDS_UK
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Re: 9.5 Hyper-V 2016 Known Issues

Post by MDS_UK » Aug 06, 2019 8:28 am


ChristineAlexa
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Re: 9.5 Hyper-V 2016 Known Issues

Post by ChristineAlexa » Aug 26, 2019 7:22 am

Another fix I didn't see in here, and will add to the list to help save someone else a few hours of hunting

- Symptom - Errors Similar to the below, where %1 is the VM name and %2 is the Virtual Machine ID)

'Checkpoint operation for %1 failed. (Virtual machine %2) Checkpoint operation for '%1' was cancelled. (Virtual machine ID %2) '%1' could not initiate a checkpoint operation: Element not found. (0x80070490). Error code: '32789'. Failed


If you have MPIO enabled on the VM,
- ensure you didn't accidently check "Add Support for SAS Devices".
- You may see errors in event log for volumes that don't exist not mounting.

To uncheck that box (since you can't in the interface), (You most likely will need to reboot afterwards, even if not prompted)
- Open a Powershell session in the VM
- Type the following command: Disable-MSDSMAutomaticClaim -BusType SAS

Once you have reboooted, follow the normal settings for Production Checkpoints, and it should work finally.

Quibus
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Re: 9.5 Hyper-V 2016 Known Issues

Post by Quibus » Sep 11, 2019 10:41 am

Does anyone know a smooth script that can merge snapshots together after an incident like this?
I have a VM that has 213 .avhdx files ... sigh...

nmdange
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Re: 9.5 Hyper-V 2016 Known Issues

Post by nmdange » Sep 12, 2019 4:57 pm 1 person likes this post

I had to modify the script to do what I needed, but this should be a good starting point
https://gallery.technet.microsoft.com/s ... e-72a96c17

Quibus
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Re: 9.5 Hyper-V 2016 Known Issues

Post by Quibus » Sep 13, 2019 6:07 am

Thank you nmdange!
This was what is was looking for :)

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