Why go through all this effort? Here are real-world scenarios where a Windows 10 qcow2 file shines:
To develop a Windows 10 QCOW2 image, you typically use QEMU/KVM to create a virtual disk and install the OS from an ISO. This format is widely used in cloud environments (like OpenStack) and Linux-based virtualization (like Proxmox or Virt-Manager). 1. Create the QCOW2 Virtual Disk First, use the
A raw img file for Windows 10 would immediately consume 30-60 GB of disk space. A qcow2 file starts small (usually 1-2 GB) and grows dynamically as Windows writes data. For example, a fresh Windows 10 installation might report 20 GB used inside the guest, but the host file may only be 12 GB due to compression and sparse allocation.
Windows 10 deleted files? The QCOW2 file remains large. Shrink it:
With QCOW2, you can take a snapshot of your Windows 10 VM while it is running . Imagine installing suspicious software or testing a beta driver. If something breaks, you roll back to the snapshot in seconds. This is native to QCOW2, unlike raw .img files.
This allows the guest OS to tell the QCOW2 file to shrink when files are deleted, preventing "image bloat."