virtio

windows 7 as kvm guest installation with virtio drivers – detected virtio scsi disk shows wrong capacity

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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 win7vnc –ram 2048 –vcpus=2 –cpuset=auto \ –disk path=win7.img,bus=virtio –network=network=default,model=virtio,mac=RANDOM –graphics vnc,port=5900 –disk device=cdrom,path=../../isos/virtio-win-0.1-81.iso –disk … Read more

kvm/qemu host windows guest BSOD about driver_irql_not_less_or_equal for viostore.sys

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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 to stay on 12.04 for ever. What can I do? Answer viostore.sys is the … Read more

How to switch in ws2012 from an IDE disk to a Virtio disk?

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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 0.1.110. 2) I shutdowned the vm. 3) I added a new … Read more

Hardware raid, LVM and KVM cache policy

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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 SSD. Now controller have virtual drives configured with “write back” and … Read more

KVM/libvirt: Using virtio disk driver in Debian installer

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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 change back to virtio. Is there any way to let the installer recognize … Read more

RHEL 7.2 – cannot find attached vda disk during install via Mirantis Open Stack

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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 (/dev/vda) attached to this image: But Anaconda cannot see it: … Read more

libvirt cannot boot windows-uefi guest with virtio storage

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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 commandline: qemu-system-x86_64 -machine type=pc-q35-2.8 \ -accel kvm -cpu host \ –bios /usr/share/OVMF/OVMF_CODE.fd \ … Read more

Partition of mdadm raid0 array passed through to win10 20H2 via virto driver is suddenly lost. How can I figure out why?

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I have checked the logs. System has been working for a month then suddenly they could not see the drive on network. It is a linux file server with a virtual windows on top of it … Virtual windows has the virtio drive of 12*10 TB Disks shared over network… The error on windows is … Read more