Windows: 7 Qcow2 File

Default cluster size is 64 KB. For Windows 7 workloads (small random I/O), a 256 KB cluster reduces metadata overhead:

qemu-img create -f qcow2 -o cluster_size=256K win7.qcow2 80G

qemu-img convert -f qcow2 win7.qcow2 -O vpc win7.vhd

You need a legitimate Windows 7 installation ISO (Service Pack 1 recommended). Place it in your working directory. windows 7 qcow2 file

A Windows 7 QCOW2 file is a virtual disk image using the QEMU Copy-On-Write version 2 format, pre-installed with the Microsoft Windows 7 operating system. This file allows Windows 7 to run inside a virtual machine (VM) under QEMU/KVM, Proxmox VE, or VirtualBox (with appropriate conversion). Default cluster size is 64 KB

QCOW2 is native to the QEMU emulator and offers advantages over raw disk images, including sparse allocation, snapshots, compression, and encryption. qemu-img convert -f qcow2 win7