Aha - found the curtin installation log - this proves the theory in the previous comment:
Oct 24 00:03:33 akis cloud-init[2796]: mdadm detail scan after assemble: Oct 24 00:03:33 akis cloud-init[2796]: ARRAY /dev/md/akis:0 level=raid0 num-devices=2 metadata=1.2 name=akis:0 UUID=01fd64cc:287c6b15:429f460f:3d53364b Oct 24 00:03:33 akis cloud-init[2796]: devices=/dev/nvme0n1p2,/dev/nvme1n1 Oct 24 00:03:33 akis cloud-init[2796]: ARRAY /dev/md/akis:1 level=raid0 num-devices=8 metadata=1.2 name=akis:1 UUID=567cc4bb:9ab3f3ac:5d876c61:320a20ad Oct 24 00:03:33 akis cloud-init[2796]: devices=/dev/nvme2n1,/dev/nvme3n1,/dev/nvme4n1,/dev/nvme5n1,/dev/nvme6n1,/dev/nvme7n1,/dev/nvme8n1,/dev/nvme9n1
Aha - found the curtin installation log - this proves the theory in the previous comment:
Oct 24 00:03:33 akis cloud-init[2796]: mdadm detail scan after assemble: 287c6b15: 429f460f: 3d53364b /dev/nvme0n1p2, /dev/nvme1n1 9ab3f3ac: 5d876c61: 320a20ad /dev/nvme2n1, /dev/nvme3n1, /dev/nvme4n1, /dev/nvme5n1, /dev/nvme6n1, /dev/nvme7n1, /dev/nvme8n1, /dev/nvme9n1
Oct 24 00:03:33 akis cloud-init[2796]: ARRAY /dev/md/akis:0 level=raid0 num-devices=2 metadata=1.2 name=akis:0 UUID=01fd64cc:
Oct 24 00:03:33 akis cloud-init[2796]: devices=
Oct 24 00:03:33 akis cloud-init[2796]: ARRAY /dev/md/akis:1 level=raid0 num-devices=8 metadata=1.2 name=akis:1 UUID=567cc4bb:
Oct 24 00:03:33 akis cloud-init[2796]: devices=