sudo steamos-update
$ sudo steamos-chroot --disk /dev/sda --partset A --no-overlay
# steamos-readonly disable
# echo '[Autologin]' > /etc/sddm.conf.d/zz-steamos-autologin.conf
# echo 'Session=plasma.desktop' >> /etc/sddm.conf.d/zz-steamos-autologin.conf
# steamos-readonly enable
# exit
$ sudo steamos-chroot --disk /dev/sda --partset B --no-overlay
# steamos-readonly disable
# echo '[Autologin]' > /etc/sddm.conf.d/zz-steamos-autologin.conf
# echo 'Session=plasma.desktop' >> /etc/sddm.conf.d/zz-steamos-autologin.conf
# steamos-readonly enable
# exit
<domain type="kvm">
<domain type="kvm" xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0">
<qemu:commandline>
<qemu:arg value="-drive"/>
<qemu:arg value="file=/var/lib/libvirt/images/vol4tests.qcow2,if=none,id=deck_nvme"/>
<qemu:arg value="-device"/>
<qemu:arg value="nvme,drive=deck_nvme,serial=12345678"/>
</qemu:commandline>
<domain type="kvm">
// 3И-НЕ
+-----+
| &|
--+ |
--+ o--
--+ |
| |
+-----+