Windows 7qcow2 Jun 2026

Move the file to your storage pool directory (usually /var/lib/libvirt/images/ ) and create a new virtual machine using the path in Virt-Manager. For OpenStack: Upload the QCOW2 image directly into Glance using the CLI:

Click and navigate to the secondary CD-ROM drive containing the VirtIO drivers.

Built-in support for reducing file size and securing data.

openstack image create "Win7-Proxmox" \ --file vm-100-disk-0.qcow2 \ --disk-format qcow2 \ --container-format bare \ --public windows 7qcow2

Windows 7 leaves empty space that qcow2 may still occupy.

Enable the discard=unmap option on the drive. This allows the Windows guest to pass down TRIM commands, reducing the actual size of the host's qcow2 file when files are deleted inside the VM. Hyper-V Enlightenments

To distribute or archive your completed Windows 7 QCOW2 image, you should clean up leftover installation files and shrink the image size: Move the file to your storage pool directory

-drive file=windows7.qcow2,if=virtio,format=qcow2,cache=writeback,aio=native

qemu-img info windows7.qcow2

Running Windows 7 in KVM: A Complete Guide to Creating and Optimizing qcow2 Images openstack image create "Win7-Proxmox" \ --file vm-100-disk-0

QCOW2 with cache=writeback is nearly as fast as raw, with superior snapshot and space efficiency.

To install directly onto a high-performance VirtIO SCSI or block storage controller, launch QEMU with both the Windows 7 installer ISO and the VirtIO driver ISO attached as virtual CD-ROM drives.

: If you want to avoid disk fragmentation and improve initial write speeds, you can use the -o preallocation=metadata flag when creating the image. Legacy Hardware