Hyper-V

Hyper-V is a native hypervisor; it can create virtual machines on x86-64 systems and supersedes Windows Virtual PC as the hardware virtualization component of the client editions of Windows NT. A server computer running Hyper-V can be configured to expose individual virtual machines to one or more networks. Hyper-V Server supports remote access via Remote Desktop Connection. Administration and configuration of the host OS and the guest virtual machines is generally done over the network.

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We've got a VM running on Hyper-V, for some reason Installed memory (RAM):  15.6 GB  (2.97 GB Usable).  Usually when i see this it make's me think it's x86 or shared with GPU. On a VM I'm unsure of why the system limits the usable amount of RAM.
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I have a Dell Power Edge T620 Server, with Microsoft Server 2012 and Hyper-V server service installed. On my Hyper-V server I have a DC, Exchange server, File server, app server and 2 servers for a DNS service called Cisco Umbrella. Everything has been fine, but all of a sudden these servers are causing the Dell server to restart randomly.

I've logged into the Dell Server administrator and no errors, I've checked for errors in event viewer and nothing. I updated all drivers and firmware, I've made sure all window updates are done, but these servers still causing problems. This is the only error I receive right before the server restarts.

forwarder-va2' has encountered a fatal error.  The guest operating system reported that it failed with the following error codes: ErrorCode0: 0xB76FD775, ErrorCode1: 0x40000000, ErrorCode2: 0xBF8D7408, ErrorCode3: 0xB774C000, ErrorCode4: 0xB774ED5C.  If the problem persists, contact Product Support for the guest operating system.  (Virtual machine ID 18468AB3-F650-4EF7-B33E-F00B85FA1748)

Any help would be greatly appreciated. Have a good day.
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I have a Windows Server 2016 running in Hyper-V.

From the Windows Update history log, I see:

2019-06 Cumulative Update for Windows Server 2016 for x64-based Systems. (KB4503267).
Successfully installed on 6/15/2015

The same log also has  10 entries (same or different dates):
2019-05 Cumulative Update for Windows Server 2016 for x64-based Systems. (KB4505052).
Failed to install on 6/15/2015


The same log also has  20 entries (same or different dates):
2019-02 Cumulative Update for Windows Server 2016 for x64-based Systems. (KB4487006).
Failed to install on 6/15/2015

Then has this entry:
2019-05 Cumulative Update for Windows Server 2016 for x64-based Systems. (KB4494440).
Successfully installed on 5/18/2019

What could be the problem for not installing the updates?  Is it necessary to go back and install a 2019-02 update, when its 2019-06 update has been installed successfully?

Note:  I also have a second Windows Server 2016 running in Hyper-V, which has these sames updates installed successfully.
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i would like to seek expert advice for the licensing window 2016 standard.Recently we just purchase one OLP license to upgrade 3 server from 2008 to 2016.

 We purchased (qty=32) Windows Server 2016 Std ,i would like to provision another VM using window Server 2016.Do i need purchade additional license?How many VM i can provision based from 32 .

Let said the license above insufficient ,how many license need to purchase ?

we have running hyper-v cluster in our enviroment.

1.HV-Nodes 1
processor: 2 x processor with 6 cores each

2.HV-Nodes 2
processor: 2 x processor with 6 cores each
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Hi, we have 10 Hyper-V Host server running on Server 2016. We have formatted the data drives as ReFS. On these ReFS volumes are the Hyper-V VM files located.

Is this good? Safe? I ask because yesterday we where at a customer and he has 1 Hyper-V host also with data drives in ReFS. He had a power failure and when the server booted his datadrives where corrupted in RAW format.

If i search the net i read alot saying that ReFS should never been done and that we should use NTFS. But this are comments from over 1 year old. Is it still the same today? Do i need to worry? What are your toughts on this? Microsoft says go ahead and use ReFS. But what is the production thing to do?
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So I have a brand new server and a Server 2019 Datacenter license. Two small-ish drives working together in a RAID 1 will be for the OS. That will be formatted as NTFS and 2019 DC will be installed here with the Hyper-V role (and that's it!). Then ... I have 6 SSD drives working together in a RAID5 and the only things that will live on this drive are the actual Hyper-V VM files.

I've read about how ReFS has come a long way since it was released with 2012, yet when you format a data drive in Windows, NTFS is still the default. So I wanted to ask - who out there has embraced ReFS for Hyper-V? Should I keep it safe and stick with NTFS? Or should I use ReFS?

This drive will never be used for anything other than storing Hyper-V files.

Also: If I go with ReFS would there be any potential compatibility issues if, say, I had to migrate a VM from an older server (having only NTFS) to this new server (having only ReFS) or vice versa?
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Looking for advice on using Generation 2 for Hyper-V VMs. As we are in the process of upgrading all of our servers, I was thinking it might be a good time to move to Generation 2. Can you tell me if there is a reason not to? All of my VM host are already Windows server 2012r2.

Great link with info on the differences between Generation 1 and 2.
https://www.serverwatch.com/server-tutorials/hyper-v-2012-r2-pros-and-cons-of-generation-1-vs.-generation-2-vms.html

Regards,
ABBEadmin
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Connecting a Hyper-V instance to my network on Windows 10. Set up External switch in Hyper-V connected to my wireless network adapter that is connected to my LAN. Set up a network adapter in the virtual machine settings connected to the Hyper-V external switch. Started virtual machine. Status is "Undefined network, no Internet". Run trouble shooter inside virtual machine and it keeps returning the same status "...doesn't have a valid IP configuration." DHCP is enabled.

Kevin
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What to expect when updating a stand alone Hyper-v Host from Windows 2012r2 to Windows Server 2019?
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I'm trying to create  a VM in Hyper-V using a custom image I've got stored on a USB HDD.  I've gone through the steps that I've done in the past, plugged HDD into Host, then made disk offline.  For some unknown reason the option for Physical hard disk is grayed out.
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Hi,

I am looking Hyper V control panel. I tried Hosting Controller and Azure Pack (Its really lengthy process).

Is there any other solution that only applicable for Hyper V control panel and it will integrate easily with Hyper V.

MachPanel/SolidCP/MSP Control not fulfill our requirement.
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We are going to set up a new server to host our VM's. We use Hyper-v and will be using Windows server 2019. The host we have are not clustered. They are set up with the OS on the same hard drive partition are the VMs and configure Raid 6. This server will replace an older one. It will host 6 vm's one of which is a Domain Controller. The new server will be a HP Proliant DL380 Gen10 with 128 GB of RAM and 2 TB of usable space.

How it be better to put the OS on it's own hard drive? If so, should I set the OS hard drive to Raid 1? VM's Hard drive to Raid 5 or 6? This server is located local. I check the drive lights weekly. At what point do I need to up the number of NICs we use? The host servers have 4, we use 2.  

Please let me know if you need additional info.
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we have single windows 2012r2 server with 2 hyperv servers running on it.

our raid is getting rather full, and wanted to relocate one of the servers onto a new 1.2tb drive we have just added to the server. we can then expand the hyperv volume size on the remaining server, to gives us some more room.

we intend to add another raid so we can expand our storage, but for the moment, we are hoping the extra drive will ease our constraint.

my question is what is the best way of relocating a vm? i have never done this before, and as it is a live production server, wanted to make sure i did it the right way.

any detailed instructions on this progress would be very much appreciated.

many thanks
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Hello,

Ive been tasked with finding and reporting all servers running SCCM or Hyper-V hosts.

Is SCCM the best way to find this information or would powershell be a better option?

Any help appreciated.

Thanks!
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Hi Guys
Using Powershell, How to get Hyper-V Team name the given virtual switch is connected to?
Thank you
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Hey all,

I am thinking of creating a virtual machine for one of my clients using Hyper-V. It will be a terminal server environment where they will be using a cetralised database and accessing emails and docs. Their documents folder is only around 50GB and they have been getting away with 240GB up until now but I will increase a little when I build it. My question: Is there a need to partition the OS from the data drive.. will this provide any increase in performance or reliability?

FYI We will be running SSD drives with 32GB RAM, 8 vCPU cores which I think is ample.

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CPU and VMsHi,
 I have a new server running Hyper-V 2019 and it came with two Intel Silver 4110  @2.1Ghz (8 core) CPUs and 64GB of RAM.
 I have 4 virtual machines - (1) Domain Controller (2) Application Server (just files and folders)  (3) Remote Desktop Server (for two remote users running Word/Excel)  (4) Windows 10 (only used if & when I need to do some testing). There are 8 users on the network.
 I am curious what would be best way to assign CPUs to VMs since there are two physical CPUs.
 Currently each VM has 1 virtual processors as I accepted "default value" when creating these VMs except manually assigned RAM amount.
 
Thanks.
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Hi experts.

To participate here, you need to be hyper-v administrator AND you need to be using hyper-V DDA (Discrete Device Assignment) with graphic cards.
All I want to know is the combination of host-OS guest OS (with build) and card modell that works for you.
Example:

Host OS: Server 2016 v1607
Guest OS: Win10 v1803
Card modell: nvidia quadro P2000

Any participant will get a fair share of the points in case that matters :-)
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Running Hyper-V on my laptop, connected to a 23" monitor.
My problem is that Hyper-V display is rectangular (wide) & I need it to be closer to square, as the software I run on it is more suited to a square display.
How can I get there from here?
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Dear Experts,

Is there any tutorial or guide in drawing a Hyper-V vSwitch Port Assignment diagram?
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Hi, I was wondering if there was a way to use Veam Backup and restore to backup from an ESXi server and restore to a Hyper-V system.

Thanks all.
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I have two 2012 R2 Servers joined to a domain and running HyperV. Both Servers are connected to a SAN via iSCSI and so there are about 8 mapped drives on each server using iSCSI initiators. The previous admin had replication going from Server A to Server B. The VM's have their storage in multiple mapped drives. We upgraded the Backup SAN with bigger drives. The previous Admin setup Replication between the two and then quit.

We failed the HyperV Replication over to the Backup Server and SAN. Everything came up fine, however when we upgraded the Primary SAN and went to set the Replication back up I can't figure out how he did it. When you set the Replication it has a field that says "Specify the default location to store the Replica Files:" under the Authorization and storage section. All of the iSCSI connections have different drive letters.

If I start a replication of VM1 and use it's storage drive letter of H, it comes over fine. But when I try to replicate VM2 with drive letter G, it goes to H as well and the VM's fill up one drive instead of going to their own drive letters and shares.

How can I set this up so they all replicate to their own storage on the iSCSI of the backup Host?
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Hyper-V DDA makes me crazy.

I have installed a 2019 Hyper-V server with a 2019 server as guest - all up2date, all current drivers installe, all bios options for hyper-v are set.
I am trying to make a graphics card available to a machine via DDA.The script from https://docs.microsoft.com/en-us/windows-server/virtualization/hyper-v/deploy/deploying-graphics-devices-using-dda works! However, as soon as I try to power on the VM, the hypervisor shows errors:
'NameOfMyMachine' failed to start.

Virtual Pci Express Port (Instance ID 540C1694-484B-4451-B6E7-91D6B2772D18): Failed to Power on with Error 'Element not found.'.

[Expanded Information]
'NameOfMyMachine' failed to start. (Virtual machine ID 96D073C6-E9B8-4095-96FD-E887B93C0EC5)

'NameOfMyMachine' Virtual Pci Express Port (Instance ID 540C1694-484B-4451-B6E7-91D6B2772D18): Failed to Power on with Error 'Element not found.' (0x80070490). (Virtual machine ID 96D073C6-E9B8-4095-96FD-E887B93C0EC5)

Could not allocate the PCI Express device with the Plug and Play Device Instance path 'PCIP\VEN_10DE&DEV_1C30&SUBSYS_11B310DE&REV_A1\4&25438C51&0&0008' because it is already in use by another VM.

Open in new window

Rest assured: that card is NOT in user by another VM since there is only one VM and there never was a 2nd. Using powershell, I can even determine that it is assigned to that very VM.

What should that funny error tell me?
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I have a number of Windows 2012 Hyper-V hosts running Server Core.  These hosts haven't been patched since they were installed back in 2016.  I've just checked and these hosts only have 25GB of free space, is there a way of checking (even a rough estimate) what the size of the update download to these servers will be?  The updates will be deployed via WSUS and GPO.  Thanks.
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I have a number of Hyper-V servers running Windows 2012 Core which have not been patched in some time.  Can I just patch the Hyper-V hosts or do I need to patch the VM's as well.  

For background, this is a legacy environment and they people that built it have left the company some time ago without any handover.  Windows Update service has been disabled on all the vm's for some reason.  The vm's are a mix of Windows 7 and Windows 2008R2.

Is it just enough to patch the Hyper-V hosts?
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Hyper-V

Hyper-V is a native hypervisor; it can create virtual machines on x86-64 systems and supersedes Windows Virtual PC as the hardware virtualization component of the client editions of Windows NT. A server computer running Hyper-V can be configured to expose individual virtual machines to one or more networks. Hyper-V Server supports remote access via Remote Desktop Connection. Administration and configuration of the host OS and the guest virtual machines is generally done over the network.