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Cloned VM's with identical BIOS GUID's

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We have 68 machines that share a UUID with at least one other machine in our environment. This had to have happened when VM's were cloned and a new unique GUID was not generated.

This is causing issues with our BMC Atrium Discovery and Dependency Mapping appliance as it is seeing several VM's with the same GUID and cannot tell them apart from one other.

This is apparently the information it is pulling from each OS:
WMIC
SELECT SerialNumber FROM Win32_BIOS
SELECT Vendor, IdentifyingNumber, Name, UUID FROM Win32_ComputerSystemProduct

I need a method to change the UUID's of these VM's. I found this article which uses PowerCLI to "add" the current time to a specified GUID every two seconds thus giving each machine a unique id.
http://www.derekseaman.com/2010/10/making-your-vmware-vm-uuids-unique.html

Is there a Hyper-V equivalent to accomplishing the same task?


Installing 8.1 with only a activation key

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I have an activation key for windows 8.1 pro I'm being told that you have to have a disk to install it. I have downloaded 8.1 to a pin drive. Can I download this off a pin drive or do I need a cd

Hyper-V installation issue with Windows 2012 R2

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Hi,
I'm getting an error when installing hyper-v on one of my servers.
I never got this issue before, as I already have two physicals servers hosting each one a vm, and one more is hosting two others vm servers. they working fine and I did not get hyper-v installation error before. I use windows 2012 R2 on all my servers.

I get the message whether I use GUI or powershell command:

The assembly reference were not found. Error 0x80073701

Please, have someone met this issue before and know how to get rid of it?

How to calculate how many VM's i can run in my Desktop stably ?

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Hi All,

I have a desktop with the below configuration:

Inter Core I5 3300 3.00 GHZ Processor (1 Processor 4 Cores )
4GB DDR3 RAM
1TB HDD

Below is the task manager screenshot:

I have installed Windows server 2012 R2 180 Days Eval on this desktop.

I Installed 5 VM's using Hyper V. When I run 2 together with 1GB RAM Each and 1 Virtual processor it almost is very slow.

When i run only 1 VM it is stable.

Is there any tool which can tell me how many VM's i can run stability with my desktop configuration ?

I am currently using the physical machine as a Domain controller as well.

Please suggest.


Gautam.75801

Enabling Hyper-V on Surface Pro 3 breaks audio over HDMI

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After enabling Hyper-V from the "Turn windows features on or off" audio over HDMI stops working, and videos will only play in half speed(and no audio). Setting the playback device to speakers will play audio and video correctly again. This has happened on all builds of windows 10 since the summer I believe, but I haven't been able to narrow down the cause until now. This has been confirmed by doing a complete refresh where no files where kept, all windows 10 updates were installed, but no other software was. Then enabling Hyper-V produces the issue. By disabling Hyper-V the audio and video over HDMI works correctly again. Issue occurs both when using the Surface Docking(newest model) and a mini-displayport -> HDMI adapter.

My system is an Surface Pro 3 purchased in nov 2014, i5, 8GB RAM, 256GB SSD.

I'm using it together with an ASUS 27' monitor. (but it doesn't work with any other TV, or projector either.)

Again: Issue only occurs when Hyper-V is enabled. I have not been able to find anything else that produces the same error with my set-up.

I need Hyper-V enabled in order to use the android and W10M emulators, so this is a really annoying problem. If this is posted in the wrong forum/category, I apologize, please help me move it to the correct one in that case.


Hyper-V 2012 R2 Host and only one logical processor is being used

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HI,

I have Hyper-V 2012 Host and in my monitoring system is showing that only one logical processor is being used while others are idle or at 0%, how i can setup them to share load.

Same issues with VMs on this host. If VM has 4 vCPU then it shows that only one vCPU is being used while others at 0%

Regards

USman


Usman Ghani - MCITP Exchange 2010

Reclaiming VHDX size

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Hi,

Hi i have Server 2012 based virtualization Host wit few VMs.

One of the VHDX grew quite large ~ 220 GB. So i went to VM and deleted some logs and windows update files. The disk size inside VM is now 160 GB but VHDX did not reclaimed free space and remained the same ~ 220 GB.

I tried to solve this using these commands using Powershell in VM

Optimize-Volume -DriveLetter C -ReTrim -Verbose

 After this i saw that the additional space was trimmed. I restarted VM but VHDX size did not change.

Afther this i turned off VM and tried command in powershell of virtualization host.

Optimize-VHD –Path C:\Temp\MyVHD.VHDX –Mode Full

The process lasted for about 15 minutes, but after this VHDX size did not change. I also tried to use Compact disk option from the Hyper-V console but this also does not help.

Any ideas how to reclaim free space ?


Hyper-V: what is it and what do I need it for?

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Greetings community,

Recently I bought new home computer. It’s a machine with Intel i7-5820K processor, X-99 chipset, and 32GB RAM. It came with Windows 10 Pro retail disk, but it wasn’t installed. So when they delivered it, I started installing Windows without troubling myself what really was enabled or disabled in BIOS. Actually, not having any experience with overclocking nor with hardware in general, I asked them to set the machine so it would not be overclocked and everything to be set as normal. As a result, my machine did not have hardware virtualization enabled, and at the moment of starting installation of Windows 10, I was not aware of that.

So I installed Windows 10 Pro x64 in order to see all that RAM. During the process, out of my sight Hyper-V was also installed.

Then I installed SQL server express, and VS2012 pro in order to be able to take my project from work and bring them home to work on them. No problem with that, everything was fine.

After that I installed VS 2015 Community in order to try and see how to make those multiplatform apps that would work on Windows 10 on desktop and phone at the same time. Unfortunately, something went wrong, and when I clicked file/new project and chose universal template, it reported package installation error for Microsoft SDKs\NETCoreSDK, specifically Microsoft.NETCore.UniversalWindowsPlatform.5.0.0. I tried several times to reinstall SDK as well as whole Visual Studio, but nothing helped.

SO MY FIRST QUESTION: Is possible that VS2015 didn’t install properly because I had installed Windows 10 on the machine with hardware virtualization disabled?

MY SECOND QUESTION: Is enabling hardware virtualization capabilities in BIOS actual prerequisite for Windows 10 (which by default includes Hyper-V) to be properly installed? Is Hyper-V properly installed on the machine with no hardware virtualization enabled?

Well, I gave up VS2015 until some free time comes up, to solve this and came back to VS2012 and projects that I have to accomplish for my employer. Requirement is to make some apps that would work on client machine that talk to server machine. Having enough memory and processor power I thought that I could install one virtual machine to play the role of client machine and talk to the host that would play the role of server machine.

First I tried Microsoft’s Virtual PC, but unfortunately you cannot make network between host OS and guest OS that is hosted with MS Virtual PC. Last time when it was possible was with Windows XP as host, when you were capable of configuring something called loopback adapter.

Then I downloaded Oracle VM Virtual Box. I installed Windows 7 Pro x32, because it didn’t wat to accept x64. Well, I tried it and it worked, but very slowly, because I was not able to give it more than one core of processor.

I browsed through Oracle’s forums and find out that in order to install 64 bits OS with more than one proc core, I have to enable hardware virtualization on my machine. They even suggested to download simple app called securable.exe which reports three things for your machine: bit length (32-64), Hardware DEP, and Hardware Virtualization. When I started securable.exe, it reported that my machine doesn’t have Hardware Virtualization. Of course I restarted to BIOS, and enabled everything related to HV. Still, after restart, securable.exe still reported the same thing: I don’t have HV.

So I browsed Oracle’s forums for some more info, and found out that I have to disable Hyper-V in order to get HV. Then I opened “Turn Windows features on or off” and disabled Hyper-V. After that, securable.exe reported that I have HV, and Oracle VM Virtual Box let me to have more than one proc core, which resulted with better performance of that virtual machine.

Now, even though I have operational construct for making required apps targeted to work on Windows 7 Pro machines mostly present at my employer’s environment (we only have one new Windows 10 machine), at some moment we should upgrade to Windows 10, so why not having prepared possibility for it. I would like to install newer Visual Studio, but it would obviously not lie down without Hyper-V, at least because it is needed for emulating windows phone, and I can foresee that I’ll be asked to make a few simple apps for WP also. But, if I’m about to use newer VS, I’ll not be able to use Oracle’s VM and vice versa.

MY THIRD QUESTION: Is there Microsoft’s solution for virtual machine with these properties:

  • It’s free for developers
  • It allows me to have host and guest OS connected through local network, and allows guest OS to have internet access to update itself
  • It works on Windows 10 pro x64
  • If it uses Hyper-V, it does it that way, so it won’t stop Visual Studio from working properly
  • It allows me to install Windows 64 bits OS as guest, particularly Windows 7 pro x64
  • It allows me to allocate at least 4GB of RAM for it
  • It allows me to reserve at least 2 proc core for virtual machine

Thanks for any help.


Hyper-V replicas - lack of space

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Hi,

I have a Hyper-V Server (H1) that replicates to another Hyperv Server (H2).
Having setup replication so that there are 20 recovery points, it turns out
there is not enough space on H2 to hold 20 recovery points. In this situation,
if I reduce the number of replication points to 10, will the space on H2 become
avaialbe automaticaly as HyperV moves to use 10 recovery points over the next
day or so or do I have to clear out the old unwanted replica data on H2 manually?
And if so what do I have to delete and what is the safe way to delete it?

Thanks


HyperV Network Issue

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I have two HP server.I have installed Windows server 2012 r2 standard on both.

from eath Hp server only NIC 1 is connected to the switch

This is the Scenario.

----------------------------------------------------------------------------------------------------------

Host A     (ip:192.168.0.20) HyperV installed

VM1:

OS: MICROSOFT WINDOWS SERVER 2012R2

IP: 192.168.0.21

---------------------------------------------------------

Host B      (ip:192.168.0.22) HyperV installed

VM1:

OS: MICROSOFT WINDOWS SERVER 2012R2

IP: 192.168.0.23

VM1:

OS: MICROSOFT WINDOWS SERVER 2012R2

IP: 192.168.0.24

--------------------------------------------------------

Now the issue is i can not see vm's on different server from a server. for example i can not see vm1 and vm2 on host B from Host A.I am also not able to ping vm1 on host A from host B. ihave access to internet on all vm's.i can also ping all vm's from router!

VM Domain Controller having issues : Need help pinpointing what's causing problems

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Good morning, 

I have a server that's continuously having issues and i'm having troubles troubleshooting what's causing it.

Host : Server 2012 Datacenter, running 2 Server 2012 VMs (1 being domain controller, 2 being an SCCM distribution point)

I had issues with this server last week, but ended up being caused by an incorrectly configured nic team.  I have since disabled the nic team and all seems to be working fine as we left Friday. 

I get in this morning, and the server had frozen up, took 20-30 seconds to respond to commands and all the access points that use this server for DHCP could not connect/get an IP.  I couldn't get an IP as well plugged up to our core.

When I rebooted the host, once it came back up all was working perfectly.  This can't continue, and i'm not 100% what's causing it.

Any particular log files/events I that you recommend to find the core of this issue would be greatly appreciated.  I know this is very general, but hoping someone can point me in the right direction.  I'm currently looking at this and will be checking back for responses.  I'm open to anything.

Thank you!

How to configure minimum bandwidth mode?

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Hello,

as per recommendation of Microsoft (Link) the minimum Bandwidth Mode on Hyper-V Hosts should be configured by Weight (%) instead of Absolute (Bps).

In Technet is a description on how to configure that during the creation of a virtual Switch, but not how to do it on an existing virtual Switch.

Does anyone know how to set it (without disrupting VM traffice)?

Thanks,
Jens



jensit.wordpress.com

Hyper V Windows Update

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Hello,

I am having an issue with my Hyper V workstations. No matter what I do, whenever I try to update them using Windows Update it goes through the entire process and in the end says it couldn't apply the updates so it has to undo the changes. It then goes on like that forever, never allowing me back into the virtual workstation. Has anyone else experienced anything like this? I can't update my virtual workstations, because of fear that the update won't go through and then I won't be able to get back into it.

Actual VM used space is not reflecting with VHD Size.

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Hi All,

Have windows 2012 R2 Hyper-V. I am Creating Hyper-V VMs on D drive which is 1000 GB of space. Now, I have created one VM with C-Drive 100 GB and D drive 900 GB. Actual D drive usage in to the VM was 600 GB and I deleted 200 GB DATA from the same D drive. So the actual D drive usage is now 400 GB but when I checked the VHDK corresponding to D drive, it is utilizing more than 650 GB on the base Hyper-V. Can anyone let me know why it is not reflecting actual utilization.

Just to add Disk Type is - Dynamically expand.

Is their any command for this?

Regards,


Hyper-V Hardening: Which services can be disabled?

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Hello!

I'm currently working on the hardening of our Hyper-V Hosts and Clusters.
Does someone know which services (except print spooler) are definitely not needed and can be disabled?

Thanks,
Jens


jensit.wordpress.com


Step-by-Step configure Host Windows 10-pro with Hyper-V Virtual Server Network at-home training environment.

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UUGGHHhhh... I am an IT student with a bit of a challenged learning ability...apparently.  I'm Learning Windows Server 12R2 and we are using Hyper-V environment in class.  I want to set up a training environment at home.  I have the needed ISO's and am great with installing them.  What I cannot get configured is the Initial Network connections between my Virtual Switch, My V-Server (which will be my parent domain) and my Host computer.  I want to have normal daily internet connections on my PC (WIN-10-Pro) and have my virtual network utilize the host PC's NIC/Router for network connections and be able to connect to the internet...but remain private.  I believe this is considered an "internal" connection.  Where there is great frustration is the IP settings.  my ISP has me set up for automatic DHCP, and my DFGW and DNS are the same.  I have looked and looked for the configurations steps beyond setting up a VS that include  the IP configuration on the VM and the Host....  I know its here somewhere!!! please assist.

Problem with Azure Stack deployment

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I have a problem with the Azure Stack deployment.

It seams like the scripts fails in the process installing Hyper-V on  my host

I have tried to just deploy Hyper-V from the Powershell promt, and the initial install is fine

But after that the Server reboots and tries to add some updates/features and after app 10 min it fails, reboots

and uninstall the cahnges again, and after that reboots again, and is back to normal...

Any inputs will be nice

Runnning on a Dell R710 with 2 cores, 144GB ram and 6 Physical disk.

VT is enabled in BIOS

Execute Disable er enabled

PCI Configuration read from NVMe Miniport driver in Windows 7 VM - Hyper-V

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Hi,

We have developed a Storport based NVMe Miniport driver for our Qualification tool in Windows 7 desktop environment.
Driver reads first 512 bytes of PCI Configuration space registers for a custom feature. We are using StorPortGetBusData
function for this purpose.

This works well in Windows 7 Desktop environment.

We installed the same driver on Windows 7 Virtual Machine with Hyper-V and exposed NVMe SSD as Virtual Function to Windows 7 VM.But in Windows 7 VM, StorportGetBusData is returning valid values for first 256 bytes and zeros for remaining 256 bytes of data. Also we tried with IobuildSynchronousFSdRequest (with  PCI_WHICHSPCE_CONFIG). but same behavior is observed.

Kindly let me know whether there is any other API/method to read first 512 bytes of PCI Configuration space registers. 
Also please let me know whether there is any other configuration do we need to change in Hyper-V?


Thanks & Regards,
Raphel

windows 7 guest OS cannot open on hyper-V 2012 r2

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I tried to install windows 7  on VM but I cannot open after the installation progress

I tried on windows server 2012 r2 and windows 8.1 but the result is same

what is the problem ?

cannot log in to a converted VM from VMWare

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Hello all,

I am trying to convert a VM hosted by VMWare into a hyper-V VM.

I am using Microsoft Virtual Machine converter.

As Hyper-V host server is not member of any domain (and of course not the same domain as the server I am using to convert the VM) I cannot convert the VM directly so I am converting Virtual Hard Drives, It has two drives. The server I am trying to convert is a domain controller. This DC is alone, there is no other DC or member in the Domain it holds.

I succesfully converted the drives, created the virtual machine in the hyper-V host and started the VM. The issue comes when I try to log in the VM, I cannot log in, it always prompts a message warning the password is not correct and I am sure it is not.

What am I missing?

thank you very much

David.


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