Virtualization is the process of using software to emulate an entire computer, in which "guest" operating systems can run.

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VirtualBox “sharing” entire host partition (non-OS) with VM

I've created a VM (Windows 10 CTP) and a new virtual disc for the OS/etc. installation. I've then created a raw VMDK which points to a partition on one of my host machine's data drives, call it Data0, ...
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Cannot restore Snapshot

Everytime I try to restore my VM from a snapshot I got My VM Freezing and I must shut it Down. When is shut down and I try to start the VM I got error: Code 'Exit: E_FAIL (0x80004005) Componente: ...
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29 views

XEN Guest cannot open display error

My setup is : [XEN - dom0] installed directly on hardware [ubuntu 12.04.5 server x64bit] , using it on CLI Mode - no GUI installed [domU - guest] HVM guest created via configuration file, I ...
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84 views

how to convert vmware to hyperv live without downtime?

Anyone know how to live convert a vmware vm (5.5, vmx3, latest vmtools) to a hyperV format without stopping the source vm? Microsoft Virtual Machine Converter 3.0 powers the server down after un ...
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32 views

VirtualBox only creates new virtual hard disk when there is enough space on 'C' drive

There are >200GB free on my 'F' drive but it failed to create a fixed-size VHD with size = 200GB. Failed to create the hard disk storage C:\Users\abc\VirtualBox VMs\OSOS\OSOS.vhd. Could not ...
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83 views

Linux (Mint 17.1) Video card's (R9 270x) sound is claimed by pci stub but the GPU isn't

So I'm trying to setup a gaming VM with on Linux Mint via KVM and VFIO. I've added the ID's of both the sound and the actual GPU but only the sound is getting claimed by stub. When I run dmesg | grep ...
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14 views

Setting up a Microsoft Cluster in a virtual enviroument

I currently have three physical hosts (Host1, Host2, and Host3) that are running Win2K8 R2 and each using installed roles: File Services and Hyper-V and installed features: Failover Clustering). ...
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30 views

Is “Host GPU on” on android emulator same as GPU passthrough?

I see that there's "Host GPU on" for standard Android emulator(which is incidentally qemu-based) from Google. Is it same as the hardware acceleration obtained by successful GPU-passthrough in ...
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90 views

VT-x Enabling (turn ON) on Intel i-7 Dual Core Windows 7

How do you enable CPU Virtualization on a Windows 7 Intel i7 Multi-Core machine? I checked and it reported that machine VT-x is supported. I am getting this error message when I try to start the VM: ...
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33 views

XEN boot error on Ubuntu Server 12.04

I am trying to boot to xen-hypervisor-4.1-amd64 package following the guide from official Ubuntu website, But whenever I reboot and try to boot into XEN (holding shift on grub and choosing xen ) I get ...
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65 views

virtualbox (osx host and linux guest), only shared folders with read/write work, those with read only permissions do not

I'm using virtualbox (with osx as the host and linux, debian 7, as the guest). Shared folders with read/write permissions set to automont work fine. But if I set the same folder as shared and ...
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13 views

KVM accessibility from host machine

We have a KVM Host machine running multiple VMs. I am now tasked to create an instance with very sensitive data. Setting firewall and other OS specific settings is not the problem. Question is: can, ...
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71 views

Hyper-V listed on Win 2012 but not Win 8.1 Pro (same machine)

I bought an Acer laptop, and installed Windows Server 2012 to do some web site testing for a client. On that installation, I used Server Manager to install Hyper-V, and two further installations on ...
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49 views

Unable to get the Full screen in KVM

I installed CentOS 6.4 in KVM (Kernel-based Virtual Machine), My base machine is Scientific Linux 6.4. I am unable to get the full screen in KVM, In virt-manager if I select full screen also both ...
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146 views

Host system hangs when starting any virtual machine in Hyper-V

This is a problem that I noticed several times now and I can't find any answer to this, so I hope that anyone of you can help me out. Today I wanted to start a virtual machine in Hyper-V running on a ...
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26 views

Why can't my virtual machine reach the host?

After creating the appropriate rule in Windows firewall, I can ping my host machine from the VM: demo@ubuntu:~/aenea/server/linux_x11$ ping 192.168.85.1 PING 192.168.85.1 (192.168.85.1) 56(84) bytes ...
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37 views

Allocating server CPU cores to virtual box guests for heavy compute, light i/o load

Please share your recommendations for allocating CPU cores to guests on big iron. I am asking basically this question 6 years later: Is there an optimal setting for the number of CPU cores exposed ...
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93 views

Windows 8.1 keeps wanting to repair itself after installing Visual Studio 2013

I have a hp 650 with virtualization enabled. I installed windows 8.1 pro. I also installed Visual Studio 2013 Pro. However, after installing VS 2013 and at some point rebooting, Windows refuses to ...
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91 views

Some audio devices (PCM_in) could not be opened

Some audio devices (PCM_in) could not be opened. Guest applications generating audio output or depending on audio input may hang. Make sure your host audio device is working properly. Check the ...
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56 views

Error when running boot2docker from inside Virtual Box

I get Non existent networking host interface name: VirtualBox Host-Only Ethernet Adapter #2 (VERR_INTERNAL_ERROR) error when I try to run boot2docker from virtual box. Error Details: Result Code: ...
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18 views

virtual network setup for NAT?

Trying to test NAT traversal for FTP. For that I need to setup 4 VMs with 2 interfaces each. I was thinking of creating a virtual network & testing on that. what are the virtual network simulation ...
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43 views

Why does my VMware Player Windows guest create all files with executable permissions on Ubuntu host?

I am running Win8.1 in VMware Player 7.0 with a shared folder with my host Ubuntu 14.04 system. Whenever I create or save a file in Windows, it gets the permissions -rwxr-xr-x in the Linux file ...
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108 views

How can I emulate Windows Server 2008 R2 with QEMU? / Cannot virtualize Win2K8 R2 using QEMU on Windows Host

I have used precompiled QEMU 2.2.0 (64-bit version) to emulate a PC running Windows Server 2008 R2. The Host OS is Windows 8.1 Enterprise 64-bit, and my CPU doesn't support Intel VT-x so I can't use ...
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how resources control transfers between host operating system and guest operating system?

can someone explain how resources(CPU, Memory, IO) are managed and controlled by host operating system and guest operating system ?
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32 views

How to do sr-iov port mirroring

Is it possible to do port mirroring while using sriov in the same host and in different host I am using libvirt and openvswitch What must i do? Perhaps bridge two controller virtual function If yes, ...
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79 views

USB 2.0 not working when VT-x is enabled

The problem I have is that when I enable Intel Virtualization Technology (or VT-x) in my BIOS, it makes my USB 2.0 ports not work. The USB 3 ports, on the other hand, are working. This is happening ...
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36 views

Xen Virtualization Types by Example

Please note: I first tried searching for an SE site where virtualization-centric questions were directly on topic. I found Virtualization, Cloud and Grid Computing, but to my surprise and dismay, see ...
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33 views

How to “sandbox boot” an operating system in a Hypervisor without a full blown host OS?

I was wondering how I could setup a Hypervisor environment that boots an operating system in in a sandboxed¹ mode, without relying on a (full blown) host (Dom0) operating system. The target ...
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46 views

Emulate 512-byte sectors with Xen

Anyone know how to make Xen 6.2 emulate 512-byte sectors when exposing a drive to a virtual guest? This would allow exposing native 4kB sector drives to older virtual guests like Windows 2003/2008 ...
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123 views

Upgrading from Ubuntu Server 12.04 to 14.04 caused KVM to no longer be supported

I finally got around to upgrading (do-release-upgrade) from Ubuntu 12.04 to 14.04 on my host machine (I have a handful of virtual machine already upgraded to 14.04), but now my host machine is ...
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12 views

Moving a VM from VirtualBox to MS Virtual Server R2

Is this possible straightforward? Do i need to convert the images before moving to Virtual Server?
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How to know if Xen hypervisor is running in ring -1?

I compiled and installed a Xen hypervisor v3.5 in my desktop (x86-64, CPU AMD Athlon(tm) II X4 640). How do I know if Xen has leveraged the AMD-V features of the the processor? More specifically, is ...
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181 views

No virtualization option in bios options in hp envy 700 215 xt core i7 processor

I ran this CoreInfo tool from Sysinterals: http://technet.microsoft.com/en-us/sysinternals/cc835722 and it says HYPERVISOR - Hypervisor is present VMX * Supports ...
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18 views

virtual machine go back to snapshot while running

I have this usual scenario when I want to go back to blank system (without changes): I stop virtual machine, then delete snapshots and then start virtual machine again. BUT: Is there any way how to ...
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109 views

Performance degradation of VM vs real machine

I know there is quite a bit of info about this topic around the web but after spending several hours reading other posts and articles I still don't have a solid understanding. Here is my setup: Quad ...
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100 views

Windows 10 Technical Preview HP Virtualization Technology : Not Booting Up

For running Windows Phone emulator of Visual Studio, it requires to enable the virtualization technology in BIOS settings. I am using Windows 10 Technical Preview in HP 15-r022tx machine. When I ...
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254 views

Blinking white transparent screen in VMware workstation 11

Whenever I play games in my VMware workstation 11 virtual machine, I get white transparent blinking screen, the blinking screen is covering entire virtual machine screen, and it goes in intervals of 5 ...
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178 views

Unable to change IPv4 properties for a VirtualBox Host-Only Adapter

Keeps coming up with: In order to configure TCP/IP, you must install and enable a network adapter card. Using Vagrant and ScotchBox if that helps but also tried with a basic Vagrant box and same ...
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36 views

esxi VM resource allocation for multiple users with varying requirements

I have an esxi host which several users will use as a development machine. Let's say that I have a host with 32 cores and 32 GB of RAM and 4-5 developers that will work on Ubuntu machines. The number ...
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186 views

Vagrant up error: E_FAIL (0x80004005) with Laravel Homestead

I've recently did an update to my vagrant box as well as a composer update for laravel homestead and now I'm granted with an error when I use homestead up. Bringing machine 'default' up with ...
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22 views

Desktop virtualization (Hyper-V / vSphere)

Is there a way to deploy vSphere on a single Desktop PC and have it do a GPU passthrough to a client (so eg. I could "switch OSs" on a key combo), or a similar solution? Note that I don't mean VMware ...
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31 views

Disk I/O controller performance

I am building an home server with an old HP media center m8125x (link for all specs : ...
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203 views

troubles with PCI-E passthrough with qemu on ubuntu: pci-stub/bind says no such device

so im trying to bind my second radeon card to pci-stub, as per instructions for setting up GPU passthrough in here, but once i get to binding the card to pci-stub, it tells me it isnt there. this is ...
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192 views

Oracle VM Virtual Box Import virtual appliance error

While importing fedora 19 virtual applience in virtualbox i met some error. here is some description of problem: image: http://s013.radikal.ru/i323/1411/ed/071ef5dd1c47.png in error description is ...
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435 views

Intel VT-x not working on Lenovo z510

I wanted use my Lenovo z510 to test the new android lollipop using HAXM, but while installing it said that I have no VT-x technology. The product page says that my processor(intel pentium 3550m @ 2.30 ...
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34 views

QEMU: Saving space in a “child” image?

I'm not exactly sure what the QEMU terminology is, so I'll clarify that "child" image means an image that has a backing image. I.e, an image that contains the differences between the backing image's ...
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75 views

Creating a similar application structure to the PortableApps format with ThinApp

I want to create a similar application structure to the PortableApps format vith VMWare Thinapp, but without the Source and Other folders. I don't need a lot of .ini files in order to save ...
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134 views

Getting an already installed Android x86 partition to run on KVM

I have Android installed on sda3, and it boots fine when loaded from Grub with the following commands: set root='(hd0,3)' search --no-floppy --fs-uuid --set=root 977083a6-5762-4064-b860-39429b9e0cf8 ...
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26 views

Boot spare harddrive in virtualbox

I recently built myself a new computer. It is currently configured with two hard drives that boot two separate operating systems. My questions: Is it possible to boot hard drive B from within ...
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157 views

How to install Ubuntu 14.04.1 with dual boot through a virtual drive created in Windows 7

This may sound a dumb question, but I really need your suggestions on it. I have a PC running Windows 7. I just downloaded an ISO file of Ubuntu 14.04.1 (the latest one). The problem is that my DVD ...