Re: Windows 7 guest installer does not detect drive if physical partition used instead of disk file.
On Sat, Mar 21, 2015 at 01:50:46AM +0800, Emmanuel Noobadmin wrote: Running 3.18.9-200.fc21.x86_64 qemu 2:2.1.3-3.fc21 libvirt 1.2.9.2-1.fc21 System is a Thinkpad X250 with Intel i7-5600u Broadwell GT2 I'm trying to replace the Win7 installation on my laptop with Fedora 21 and virtualizing Windows 7 for work purposes. I'd prefer to give the guest its own NTFS partition instead of using a file for both performance and ease of potential recovery. So I've set aside unpartitioned space on the hard disk and added /dev/sda to the virt-manager storage pool, created a new volume and assigned it to the guest as an IDE drive. Unfortunately, the Windows 7 installer does not see this drive despite being IDE and not virtio. If I use a qcow2 file as the drive, the installer has no problems detecting it. To eliminate virt-manager from the equation, I've also tried to do a very basic install using virt-install with similar results, the physical partition cannot be detected regardless of bus type (IDE/SATA/virtio) even with the signed Redhat virtio drivers loaded by the installer. I was unable to find any similar issues or solutions online except a 2 year old thread on linuxquestions which quoted that we must specify the whole disk instead of a partition. However, I cannot find the source of that quote. http://www.linuxquestions.org/questions/linux-virtualization-and-cloud-90/qemu-kvm-on-a-real-partition-947162/ Is this really the case and the reason why Windows 7 cannot see the physical partition or there is something else I am doing wrong? I have CCed the libvirt mailing list, since KVM is a component here but your question seems to be mainly about libvirt, virt-manager, virt-install, etc. It sounds like you want an NTFS partition on /dev/sda. That requires passing the whole /dev/sda drive to the guest - and the Windows installer might overwrite your GRUB Master Boot Record. Be careful when trying to do this. Also keep in mind that the virtual machine's hardware and your physical hardware are probably quiet different (different chipsets, PCI devices, etc). Windows might not be happy booting on the physical host if it was installed under KVM, and vice versa. This is known as physical-to-virtual (p2v) migration and means some tweaks or driver installs may be necessary to make Windows run after switching. Stefan pgprBcrq2t8NW.pgp Description: PGP signature
Re: Windows 7 guest installer does not detect drive if physical partition used instead of disk file.
On 3/23/15, Stefan Hajnoczi stefa...@gmail.com wrote: I have CCed the libvirt mailing list, since KVM is a component here but your question seems to be mainly about libvirt, virt-manager, virt-install, etc. Apologies for posting to the wrong list, I assumed it would be KVM related as the guest could run but could not see the drive. More information 1. install guest with /dev/sdxx as virtio device (the problem case) - installer does not see any drive - load drivers on Redhat virtio cdrom - installer still does not see any drive 2. Install guest with qcow2 disk file as virtio device - as previous scenario but installer see drives after installing drivers 3. install guest with qcow2 disk file as IDE device - complete installation - add /dev/sdxx as virtio disk - goto Windows Device Manager and update virtio driver for unknown controller - Windows see /dev/sdxx after driver installed It sounds like you want an NTFS partition on /dev/sda. That requires passing the whole /dev/sda drive to the guest - and the Windows installer might overwrite your GRUB Master Boot Record. Be careful when trying to do this. Yes, I wanted to give Windows its own native partition that could be read directly if I had to yank the disk and put it into a Windows machine. Is this why #3 works but not #1? That as long as I want to install Windows directly to an NTFS partition on/dev/sda, it is required that I pass the whole drive to Windows? -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Windows 7 guest installer does not detect drive if physical partition used instead of disk file.
Running 3.18.9-200.fc21.x86_64 qemu 2:2.1.3-3.fc21 libvirt 1.2.9.2-1.fc21 System is a Thinkpad X250 with Intel i7-5600u Broadwell GT2 I'm trying to replace the Win7 installation on my laptop with Fedora 21 and virtualizing Windows 7 for work purposes. I'd prefer to give the guest its own NTFS partition instead of using a file for both performance and ease of potential recovery. So I've set aside unpartitioned space on the hard disk and added /dev/sda to the virt-manager storage pool, created a new volume and assigned it to the guest as an IDE drive. Unfortunately, the Windows 7 installer does not see this drive despite being IDE and not virtio. If I use a qcow2 file as the drive, the installer has no problems detecting it. To eliminate virt-manager from the equation, I've also tried to do a very basic install using virt-install with similar results, the physical partition cannot be detected regardless of bus type (IDE/SATA/virtio) even with the signed Redhat virtio drivers loaded by the installer. I was unable to find any similar issues or solutions online except a 2 year old thread on linuxquestions which quoted that we must specify the whole disk instead of a partition. However, I cannot find the source of that quote. http://www.linuxquestions.org/questions/linux-virtualization-and-cloud-90/qemu-kvm-on-a-real-partition-947162/ Is this really the case and the reason why Windows 7 cannot see the physical partition or there is something else I am doing wrong? -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
