>> 3. On both host and guest > This is what I always use and recommend. It doesn't have any side effects with modern software versions, except with layered Thanks! I have tried this, but I don't see how to grow the guest file system without restarting the guest: - if I grow the underlying logical volume on the host, the guest still see the hard drive with the old size (checking with fdisk) - if I would add additional logical volumes (host) / drives (guest) in order to add them to the guest volume group, I will have to restart the guest I am using virtio disks. Is there a command so that the guest notices that its harddrive has grown? Is there a way to add new drives without restarting the guest?