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Questions tagged [virtio]

51 questions
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KVM - Modify from IDE to VirtIO

I imported a CentOS 7 guest from XenServer to KVM. After importing it into KVM the disk bus in use is the IDE. I need to change the disk bus from IDE to VirtIO because VirtIO has better performance. I have seen many forums... No solution so far...…
Eduardo Lucio
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libvirt cannot boot windows-uefi guest with virtio storage

i have hyper-v gen2 win-guest and need to migrate on kvm with libvirt. I convert one guest from vhdx to qcow2 with qemu-img, start it with qemu-system and hda-drive, install virtio drivers. After that i start it with virtio storage with that…
Иван Иванов
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windows guest OS over kvm hypervisor does not preserve disk status after attaching network interface

I have openstack based cloud environment. I have kvm/qemu based hypervisors. I created Windows guest OS vm on one of the hypervisors. And I attached volume(vhd) to vm. I changed disk status to online in guest OS. Then I attached (hotplugged) network…
Rohanil
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How to get a virtio disk to show up - kernel config

I'm trying to set up a Gentoo guest on a virtio drive. When I boot the VM using an ubuntu livecd, I do have a /dev/vda on which I installed the system using LVM. I compiled a 4.9.16-gentoo kernel enabling basically everything with virtio in the name…
Ulrar
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Change Boot drive in SeaBios

I need to copy my KVM machine for further update. BUT our provider don't provide opportunity to copy a whole machine, just a hard drive. (virtio drive vda/vdb etc) So, I made a new clean machine, attach old drive copy and now trying to replace main…
mr.frog
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RHEL 7.2 - cannot find attached vda disk during install via Mirantis Open Stack

In trying to install RHEL 7 from an ISO (instead of deploying from an existing KVM image) in Mirantis Open Stack, I run into Anaconda not being able to find the attached disk - and so installation cannot proceed. There is a 160GB virtio disk…
warren
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KVM/libvirt: Using virtio disk driver in Debian installer

I try to install Debian in a KVM-based VM using the virtio disk driver/bus and virt-install to run the installer. However, it seems that the installer lacks the virtio driver. Once I switch to bus=ide, the installation succeeds and afterwards, I can…
StephenKing
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Hardware raid, LVM and KVM cache policy

I have a question about right cache policy for KVM using LVM and hardware raid-controller. So from the bottom: 1. We have LSI RAID controller 9260, 512Mb cache and BBU. Later we also will have CacheCade(SSD Drive as a cache) license and will use…
Dmitriy
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How to switch in ws2012 from an IDE disk to a Virtio disk?

I am running Windows server 2012 in a virtual machine under Debian Jessie. I tried to follow the Red Hat tutorial in order to switch on the Virtio drivers: 1) I downloaded from Debian the virtio drivers; the current version of the virtio-win.iso is…
Bertaud
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kvm/qemu host windows guest BSOD about driver_irql_not_less_or_equal for viostore.sys

I have a KVM/Qemu host running 4 Windows Server 2012 guests and after upgrading the host from Ubuntu 12.04 to 14.04 I get blue screens with a bug check string of "driver_irql_not_less_or_equal" that is caused by driver "viostore.sys". I don't want…
ndemou
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How to migrate from ide to virtio in RHEL 6.5 KVM guest with LVMs

I want to migrate a IDE-using, LVM-based KVM guest running RHEL 6.5. I found this steps in this page: 1) Run virsh edit . From there, edit the config file and adjust all lines of so they look like this
Nocturn
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KVM Aggregate Throughput Limited at 1Gb - Virtio Queues Limiting Factor?

I have a KVM host with three NICs and can't get traffic between guests (in same subnet) above 1gbps aggregate. Is this by design and the only way to achieve >1gbps to use multiqueue support? So far, I've tried all combinations of…
RyanH
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windows 7 as kvm guest installation with virtio drivers - detected virtio scsi disk shows wrong capacity

I am trying to install windows 7 64bit as a kvm guest. I read here that I should install the virtio scsi driver during installation. I use virt-install to start my installation from the command line virt-install --connect qemu:///system \ --name…
nass
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KVM Win 7 Pro + RH virtio net driver

Host: Debian 7.2 x64. Guest Win 7 Pro 32-bit. Virtio disk drivers work flawlessly, but there's a problem with virtio net (netkvm something) drivers. Virtio drivers come from virtio-win-0.1-74.iso. This network card works perfectly in win7…
LetMeSOThat4U
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Is it possible to use the IO priority from a KVM guest on the host?

When I use KVM with libvirt and virtio block devices, does it propagate IO priority in some way? If the guest starts a process with ioidle priority, I want it to run only if the host is also in ioidle state. Is there an easy way to propagate the…
allo
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