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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1849682 Title: [REGRESSION] md/raid0: cannot assemble multi-zone RAID0 with default_layout setting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-notes/+bug/1849682/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs