Hyper-V Host and GPO

Dear All,

I have a Windows 10 Pro machine and running Hyper-V on it. I have 3 virtual Server 2016 running and one virtual Windows10, which are running in a local domain.

Everything works fine so long but the virtual Windows10 machine is a little bit troubled.

First of all, it can happen, that when I try to login to the domain on the virtual Windows10 machine, I get an error that I need remote access permission to do so. It try several times, get disconnected from the VM and re-connect and after 2-3 Minutes, I
suddenly am able to login. Additionally I have the issue, that the GPOs I have set are not pulled through the virtual windows 10 machine.

I have two test users, I use to login to the virtual windows10 machine. Those two users belong to a security group, which I added to an individual OU in AD. I have linked the GPO to that OU and also tried to force the GPO but I have no luck, logging in with
those two test accounts onto the virtual windows10 machine, I have the default background.

When I look at the GP result, I do not see the GPOs that I have set. For a test, I set a desktop background picture but as soon as I login, there is nothing happening and the GPO also shows nothing.

I am able to ping the virtual DC from my virtual windows 10 machine, I can connect to shared drives.

Do I need to open a specific port for the GPO, or do you have any idea, what I am doing wrong?

What kind of more specific details do you need to understand my situation?

Thank you very much for helping,


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Server2008R2 install VMGUEST error


I want to run a win 2000 VM in Server2008R2 Hyper-V ,but i can not install the VMGUEST,so i can not use mouse normaly.

If you had  same problem with me and how did you solve it?


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Recommended HDD/RAID Configuration for Hyper-V Server

I have read over articles about best practices in setting up Hyper-V server.  What I read seemed to indicate putting the page file on a separate disk than the operating system and similar with the virtual machines was a best/recommended practice. 
Is this recommendation geared around putting them on separate physical disks or separate partitions?

I have a Dell R710 server that I’m building a small home lab on and will run a several virtual machines, most likely under 10.  The server came with four 300 gb 10k rpm 6gb/s SAS drives.  I have four more bays and was looking at one of the three

  1. Getting four more 300 gb drives
  2. Getting four 600 gb drives of the same speed/rpm to add to the server
  3. Or getting eight 600 gb drives and replace the four 300 gb drives (sell them on eBay or something)

Obviously adding four more 300 gb drives is the cheapest option, but not sure if it will give me all the drive space I’ll need for the future.  If I went this route, what would be the best RAID configuration?  Do I setup a RAID 5 or 1 setup for
the OS and then create a large RAID 5 or 10 array for the virtual machines?  My thoughts on the 300 gb drives is that going with a RAID 5 setup it may be wasting space on the OS array/partition if I just have the Hyper-V host OS.

If I add four 600 gb drives I should have plenty of space for the virtual machines, but again am I best utilizing the 300 gb drives for space and configurability?

If I add eight 600 gb drives, again what’s the best configuration?  Is a RAID 10 setup as one large array or setting up a smaller array and larger arrary?

Thank you in advance for any comments or feedback on a recommended setup or links to something to read.


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Network Connection Failed

I have just installed Hyper-v and set up a virtual machine for Ubuntu 17.10. It opens but cannot make a network connection. The computer is Windows 10, 32 GB RAM with significant free space on the 500 GB system Drive and significant free space on the 3
TB data drive. I have no idea what the problem is.

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Checkpoint disk size

Dear Team,

Thanks in advance!

Me first time in Hyper-V area, while create a checkpoint of VM its size auto increase daily base. We couldn’t find out what is the actual reason.

Kindly advise.

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Can’t Reach RDP on Windows Hyper-V Server 2019



  1. While it was still available, I downloaded Windows Hyper-V Server 2019
    and installed it on a fresh machine. The installation completed without incident.
  2. After installation, I did the standard sconfig config, enabling both Remote Management
    and Remote Desktop, as well as incoming pinging.
  3. I then joined the Hyper-V to the domain without incident. 
  4. The Hyper-V could be pinged from anywhere in the LAN.
  5. I can successfully manage the Hyper-V via Hyper-V manager mmc from other domain machines.

The Problem:

I can not RDP into the Hyper-V.

  1. I checked, and the Scregedit.wsf /ar /v   registry value is 0 (i.e., do NOT block RDP).
  2. I also tried netsh advfirewall firewall set rule group="Remote Desktop" new enable=yes, to no avail.
  3. I cannot even get a reaction when on the Hyper-V itself, with
    telnet localhost 3389 .

I would appreciate any suggestions.



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Coexist? Hyper-V and Virtual Box on Win 10 Pro

I’m running Hyper-V version 10.0.17134.1 on Windows 10 Pro (Windows 10 Pro Version 1803 OS Build 17134.345). I need to install Virtual Box version to run GNS3 VM. Non-Production environment. All VMs used for project sandbox and training/learning

I do _not_ intend to run Hyper-V and Virtual Box at the same time. I would like to use them independently and I don’t want Virtual Box to harm my existing Hyper-V VMs.

Hyper-V runs great on my system - love it. So my question is:

Can I install Virtual Box on my Win 10 Pro Workstation (8-core AMD) which has Hyper-V installed?

I wish I could run the GNS3 VM on Hyper-V. Anyone heard of that being possible?

Thanks and Happy Friday!



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Hyper-v and storage sharing

I’ve Hyper-V Server 2016 free edition. There is 4 disks RAID10 for Hypervisor and 2 Server 2016 Standard VMs.  There is another RAID5 storage. Each disk is connected to server by internal RAID controller. 

How to share additional RAID5 storage to Guest Server 2016 VM?

RAID10 is only for Hypervisor and VM

RAID5 will be only for databases and user files, but how to give this storage for VM Servers?

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Hyper-V VSS writer missing

I’m using Backup Exec 20.1 to perform daily backups of virtual machines, but quite offten the backup end up failing due to error: 

V-79-57344-37935 - Snapshot Technology: Initialization failure on: "VRTSRV::backup.blade.localHyper-V?Virtual?MachineDC_b". Snapshot technology used: Microsoft Volume Shadow Copy Service (VSS).

Snapshot technology error (0xE000942F): Cannot capture a snapshot of the virtual machine volumes. Ensure that the Hyper-V Virtual Machine Management Service is running and the status of the Microsoft Hyper-V VSS writer is Stable.

Check the Windows Event Viewer for details.

When i look for the writer in the "vssadmin list writer" output, the writer is not present there. If I restart Virtual machine management service and run vssadmin again, the writer appears.

Sometimes many backups can complete without the writer dissapearing, but then the writer dissapears again. I can’t find any error on warning in Windows Event Viewer.

I’m running Windows server 2016 and the VM’s are running on the same server as the Backup Exec is installed on.

So is there any sollution to this problem or a way to find out what is happening to the writer ?



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Separate LiveMigration dedicated host vNIC in S2D HCI ?


There are many ways to Rome. One area I’m still struggling with is when to separate network traffic in a Hyper V cluster. And when not.

What we do now is the following, and seems to work I guess.

- 6-node S2D HCI HyperV cluster
- 3 vNICs on a logical vSwitch, which uses Embedded Teaming
- vSwitch is uplinked with 2X10GB Mellanox RDMA to physical world

The 3 vNics in each hosts are assigned as;

1) Management vNic
2) S2D Storage A (for cluster/S2D traffic using SMB3 Direct/RoCe)
2) S2D Storage B (for cluster/S2D traffic using SMB3 Direct/RoCe)

And off course, the regular VM traffic plugs into the vSwitch also, but these vNics are not shared with the ManagementOS.

So where does that leave my Live Migration traffic within the cluster ?
Well it’s set to also use Storage A and B by limiting it to those IP Subnets. This automatically makes my Live Migration traffic also use RDMA etc. But it also means the QOS Weight set on the port-profile is the same and shared (Cluster and Live Migration)

The other way I guess is to add a 4th vNic and make that specifically be used for Live Migration. Allowing you to also use a dedicated port-profile for it (with dedicated weight). This is what we usually did before we went with S2D.

I’m guessing both will work it properly configured. But which one is preferred or does is really not matter at all ?
Any thoughts ?


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