To run the (Original Xbox emulator), you need a pre-formatted hard disk drive (HDD) image, typically named xbox_hard_disk.qcow2
xemu -hdd ~/.xemu/xbox_hdd.qcow2 -boot HDD
Essential Guide to Xbox HDD Images for Xemu: Setup and Management xbox hdd image xemu
You can obtain a clean, pre-formatted 8GB hard disk image directly from the official xemu website documentation Standard Size To run the (Original Xbox emulator), you need