> You can put a wedge on the disk That seems to work. At least with manually created (dkctl addwedge) wedges.
> or put the raid on the raw disk itself. That doesn't work. It truncates the component capacity to the truncated value in the disklabel. I even tried to create (raidctl -C) the set with wedges, initialize it (-I), then unconfigure it (-u), change the components to the full-disc partitions in the config file and re-configure (-c) it. It came up with full capacity with the wedges and truncated with the full-discs. Looks like I have to put GPTs on the component discs.