The QCOW2 format is the native disk image format for QEMU and KVM (Kernel-based Virtual Machine). Unlike "raw" images, which occupy the full disk space immediately, QCOW2 files are thin-provisioned. This means a 100GB Windows 7 virtual disk might only take up 15GB on the physical host—growing only as data is written. Furthermore, it supports snapshots, allowing users to "save" the state of Windows 7 before making risky changes, a feature indispensable for testing legacy drivers or older software suites. Why Virtualize Windows 7 Today?
You can save the state of your Windows 7 VM at any moment. If a legacy update or a virus breaks the system, you can roll back in seconds. windows 7qcow2
: An installation disk image of Windows 7 (e.g., Ultimate or Professional). The QCOW2 format is the native disk image
When asked "Where do you want to install Windows?" , the drive list will be completely blank. Click -> Browse . Navigate to the attached VirtIO CD-ROM drive. Furthermore, it supports snapshots, allowing users to "save"
qemu-img info windows7.qcow2
QCOW2 supports internal snapshots, allowing you to revert Windows 7 to a previous state instantly.
For network simulators like EVE-NG, the general workflow is: