@dmi 💽 btw for dmi:chroot
And yes, if you're wondering “can I boot the same system up twice from the same partition” - yes.
One can restrict that on linux with BLK_DEV_WRITE_MOUNTED=n, which I got on my machines just to avoid a footgun, so QEMU stuff either involves umount or using it's -snapshot option (I use the latter for testing whether machine boots up nicely).