LXD machine failed testing

[Serge]

After creating a machine in LXD host with defaults, it fails during commissioning:

----[ smartctl-validate log ]-----
Unable to run 'smartctl-validate': Storage device 'QEMU HARDDISK' with serial 'lxd_root' not found!

This indicates the storage device has been removed or the OS is unable to find it due to a hardware failure. Please re-commission this node to re-discover the storage devices, or delete this device manually.

Given parameters:{'storage': {'argument_format': '{path}', 'type': 'storage', 'value': {'id_path': '/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_lxd_root', 'model': 'QEMU HARDDISK', 'name': 'sda', 'physical_blockdevice_id': 12, 'serial': 'lxd_root'}}}

Discovered storage devices:[{'NAME': 'sda', 'MODEL': 'QEMU_HARDDISK', 'SERIAL': 'lxd_root'}]

Discovered interfaces:{'00:16:3e:92:74:a8': 'enp5s0'}

---

This is strange because it has discovered storage `lxd_root`.

--
MAAS version: 2.9.0~alpha1 (8706-g.0e9af9a0b)

>> LXD Host:
  driver: lxc
  driver_version: 4.0.3
  firewall: xtables
  kernel: Linux
  kernel_architecture: x86_64
  kernel_features:
    netnsid_getifaddrs: "true"
    seccomp_listener: "true"
    seccomp_listener_continue: "false"
    shiftfs: "false"
    uevent_injection: "true"
    unpriv_fscaps: "true"
  kernel_version: 5.4.50
  lxc_features:
    cgroup2: "true"
    mount_injection_file: "true"
    network_gateway_device_route: "true"
    network_ipvlan: "true"
    network_l2proxy: "true"
    network_phys_macvlan_mtu: "true"
    network_veth_router: "true"
    pidfd: "true"
    seccomp_notify: "true"
  os_name: NixOS
  os_version: 20.09.git.33b5621ef66M
  project: default
  server: lxd
  server_clustered: false
  server_name: emw-ma14001
  server_pid: 10309
  server_version: "4.2"
  storage: zfs
  storage_version: 0.8.4-1