Windows 10: VM in Hypervisor's C Drive runs at 100% active time

Discus and support VM in Hypervisor's C Drive runs at 100% active time in Windows 10 Software and Apps to solve the problem; I'm a little new to Hypervisor, having been using VMware for decades.I think I have a configuration problem somewhere, but I cannot determine what that... Discussion in 'Windows 10 Software and Apps' started by C--Z, May 8, 2025 at 10:47 AM.

  1. C--Z Win User

    VM in Hypervisor's C Drive runs at 100% active time


    I'm a little new to Hypervisor, having been using VMware for decades.I think I have a configuration problem somewhere, but I cannot determine what that might be. The disk drive on this VM runs at 100% and barely moves any data at all, the VM is very VERY slow to respond to anything.The virtual machine is well-resourced:The host machine's Z drive, where the VM lives, can also run at 100%, mostly because of the VM, but there is plenty of performance overhead for everything else that the host does not much, and the host runs fine, no matter what the VM is doing.What can I do to increase the VM

    :)
     
  2. MMO77 Win User

    Windows 10 VM activation

    Hi,

    I am trying to setup two Windows 10 vms for test purposes on Ovirt virtualization cluster. (Windows 10 Pro with MAK key from visual studio (MSDN) subscription).

    Activation of the first vm encountered no problem, but activation of the second one failed. I have tried to setup second vm by all available means (by cloning from the first one with or without sysprep, from activated state or from clean installed snapshot,
    by installing second vm from scratch, etc.). All are with the same results: The last product key you entered XXXXX can't be used on this copy of Windows (0xC0EA0003).

    Is it possible to have several Win 10 vms on the same hypervisor, activated with MAK key?

    Any suggestions are highly appreciated.
     
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    Jonathan Lee (jlee102), May 8, 2025 at 10:51 AM
    #3
  4. jimbo45 Win User

    VM in Hypervisor's C Drive runs at 100% active time

    Converting VMWare Windows VM to run on Linux hypervisors

    Hi Virtual Machine user Geeks !!!

    You can convert Windows VMWare VM's to run on KVM or XEN --- these are 2 of the Linux HYPERVISORS equivalent to HYPER-V on Windows.

    For XEN (although KVM these days is the preferred method) :

    If you are using a Linux Host and have Windows VM's running under VMWare here's an interesting little experiment : Get the VM to run under XEN (one of Linux's HYPERVISOR). Copy / backup the VMWARE VM though first.

    1) you need to get the .vdmk files into a single "big" file if you used the option to create the VHD in "chunks".

    run this script : (as root of course)

    # for i in `ls *[0-9].vmdk`; do qemu-img convert -f vmdk $i -O raw ${i/vmdk/raw} ; done
    # cat *.raw >> flattened.img

    2) convert to "raw" using "Good old qemu" -- still working !!!

    # qemu-img convert vm1.vmdk -O raw /vms/vm1/vm1.img

    3) Create an appropriate Xen Project VM configuration file in /etc/xen/vm1/, with a line specifying the converted file as disk:
    disk = [ ‘file:/vms/vm1/vm1.img,hda,w’ ]

    4) Boot and go

    Still got some sound issues but looks good - ensure of course libvirt packages are installed.

    I'll have a go also with the other Linux HYPERVISOR system KVM and see what happens there too.

    I'm really interested in comparing performance of Windows VM's under these with Ms's HYPER-V - although one disadvantage of HYPER-V using a W10 Host is that the overhead of the Host OS (Windows 10) will be much higher than that of a lean mean linux distro especially if you install without a GUI.

    @Kari -- any ideas on maximizing performance of Windows HYPER-V VM's on a Windows Host (preferably W10).

    This stuff is quite addictive so ensure you have plenty of time before starting !!!!!!

    KVM though IMO is the way to go with this but I already had a little experience with XEN.

    For KVM : If you have RHEL or can get the virt-v package : it's easier but can't gurantee that you can do this easily on non Red Hat type distros. I have RHEL7/8 and Centos so no prob here.

    Converting Virtual Machines from Other Hypervisors to KVM with virt-v2v in RHEL 7 - Red Hat Customer Portal

    Works also on CENTOS (make sure >7.2) which is easily available (free) if you can't get RHEL --it's pretywell 100% comaptible with RHEL anyway

    package installs just fine on my CENTOS 7.6 system.


    VM in Hypervisor's C Drive runs at 100% active time [​IMG]



    will post results of VM's back later


    Cheers
    jimbo
     
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VM in Hypervisor's C Drive runs at 100% active time

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