This problem can be recreated in a trivial VirtualBox environment by attaching a virtual disk image with no partition table, such as a btrfs volume occupying an entire device directly. I've attached a virtual disk image of such a device. Simply attach this device as the only harddisk to a vanilla VirtualBox instance and boot an ubuntu live cd image.
This problem can be recreated in a trivial VirtualBox environment by attaching a virtual disk image with no partition table, such as a btrfs volume occupying an entire device directly. I've attached a virtual disk image of such a device. Simply attach this device as the only harddisk to a vanilla VirtualBox instance and boot an ubuntu live cd image.