Set your disk cache mode to none or writeback and use the threads IO mode for the fastest read/write speeds on SSDs.
Disclaimer: Always verify SHA256 checksums of downloaded QCOW2 files. Microsoft does not officially support running Windows 11 on QEMU/KVM without Hyper-V enlightenments. windows 11 qcow2 download best 2021
In 2021, there are a few key things you can do to push your VM's performance closer to native levels. Set your disk cache mode to none or
In the world of Linux, QCOW2 (QEMU Copy On Write version 2) images were standard. They were small, snappy, and allowed for "snapshots" that saved the state of a machine instantly. But for Windows? Historically, Windows ISOs were the standard, requiring manual installation every single time. In 2021, there are a few key things
Download the OSBoxes Windows 11 QCOW2 (updated November 2021). Unzip, import into virt-manager, add a TPM 2.0, and boot.
Windows 11 introduced strict hardware requirements in 2021. If you are building your own VM using a QCOW2 image, your QEMU/KVM hypervisor must mimic these specs to boot successfully:
A Windows 11 image from 2021 is running an outdated build (likely build 22000.x). While it would still function, it would require massive updates (cumulative updates, .NET frameworks, and security patches) immediately upon boot. This negates much of the time-saving benefit of downloading a pre-made image.