Ok, You *might* be able to fix it this way:
1. Get BOTH nodes to the Boot Menu
-> LOADER> boot_ontap menu
2. Wait for the menu
3. Choose Option 9 on both controllers (remove all partitions and ownerships)
4. Perform Option 9a on one controller. Once it finishes, perform on second node.
5. Now, instead of doing option 9b, Choose option 9e (return to main menu) on both nodes
6. Boot into MAINTENANCE mode (Option 5) on both nodes
7. Manually assign disks 12 to each node
-> First, run the command on each node: "disk show" and record the system id (node 1 should be 538048277 and node 2 should be 538046447.
-> From ONE controller, assign all disks
-> disk assign -n 12 -s 538048277
-> disk assign -n 12 -s 538046447
-> if these commands do not work, you will probably need to manually assign 12 disks to each node.
-> you can either do disks 0-5 on both shelves to node 1 and 6-11 on both shelves to node 2
-> or you can assign all 12 disks on shelf 0 to node 1 and all 12 disks on shelf 1 to node 2
-> Look at ownership on BOTH controllers now
-> disk show (perform on both)
-> all 24 disks should be owned but not partitioned (yet).
8. Halt both controllers.
-> halt (on both)
9. Boot both controller back to the boot menu
-> boot_ontap menu
10. From the Boot Menu on NODE 1, choose option 4. Verify prompts and let it reboot
-> WATCH the messages!!!
-> Hopefully, the disks will partition automatically.
11. If you see that they do, go ahead and start node 2 with option 4
Please record the entire session. (dumpt to logs again! Thanks!)
If this does not partition automatically, we might be able to guide you through manual partitions.
I'd rather not and hope the auto-partition works.
Please let us know
PS-> I still think you are hitting a BUG. This platform, according to HWU should use RAID-DP (and not RAID-TEC) for creation of the root aggregate. If this process works, it will likely still use RAID-TEC, which is still OK. You are not really loosing anything!