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truncate -s 50G winXP.img # create an image kvm -hda winXP.img -m 2048 -monitor stdio -net nic,model=rtl8139 -net +user -usb -cdrom /dev/cdrom
qemu-img create -b winXP.img -f qcow2 temp.img kvm -hda temp.img ... rm -f temp.img