Hello,
I do not see why you wouldn't be able to use those disks in the way you want. It seems they are partitioned. These are new/unused shelves, right?
Can you share the output for the below commands?
storage disk show -ownership
storage disk show -partition-ownership
If they are partitioned, you should be able to remove the partitions with the following command:
system node run -node xxx -command disk unpartition xx.xx.xx
or
set d
storage disk unpartition ....
Kind regards,
Pedro