DragonflyBSD on QEMU booted right but can not install!

[Sergey Zigachev]

> Could you please let me know what QEMU parameters I should use to prevent this problem from happening again? Thank you.

I'm using these:
qemu-system-x86_64
     -m 4096
     -drive if=virtio,file=dragonflybsd.qcow2,format=qcow2,index=0,id=disk
     -device ahci,id=disk
     -netdev user,id=mynet0,hostfwd=tcp::8822-:22
     -device e1000,netdev=mynet0
     -smp 4
     -cpu host
     -enable-kvm
     -display gtk

This also allows me to connect to a VM over ssh port 8822.