This sounds a lot like our old disk wiping logic where when run on HDDs would literally write zeroes all over them, potentially taking a long time. If that’s the case, you should see a bunch of disk activity though and it should eventually result in a working pool.
These are big 8tb hdd drives so I suppose if its running a wipe it could take a long time, but I haven’t seen any new pools created and I ran this yesterday.
Interestingly the old pool was never created. However, I just ran the identical command and it finished successfully and instantly. The old encryption keys that were leftover were deleted too , so I’m assuming some kind of clean up task ran?
I suppose the issue is solved but I’m quite curious what happened here exactly.