Thanks for the help. A test run with the ContainerHost-SelfInstall iso shows that the following butane file does not go through with the error. " [ 696.4770431 dracut-pre-trigger18201: Failed to send request to update environment: No such file or directory 698.62534310 T18471 ETRFS: device label ROOT devid 1 transid 97 deursda3 scanned by ludey-worker) (1847) " Any help is appreciated. butane (also configuring home next to the other device throws an error in the butane to ignition file step): variant: fcos version: 1.5.0 passwd: users: - name: core groups: - "sudo" - "docker" # ssh_authorized_keys_local: # - id_ed25519_fcos_user_core.pub password_hash: $y$j9T$vrCC7VE5KE2iDPgrhkHVf.$ixL1H2IU3V5pE6u6C3oOQLaTm1MH7RNETrm/N7mGX0A storage: disks: - device: /dev/vda partitions: - label: root number: 4 # 0 means to use all available space size_mib: 0 resize: true luks: - name: root label: luks-root device: /dev/disk/by-partlabel/root key_file: local: luks.key wipe_volume: true discard: true options: - --pbkdf=argon2id open_options: - --perf-no_read_workqueue - --perf-no_write_workqueue filesystems: - device: /dev/mapper/root format: btrfs wipe_filesystem: true label: root # - path: /home # format: btrfs # wipe_filesystem: false # mount_options: # - "subvol=/@/home"