Hey Jonathan
I deleted the partitions, and it's still only showing the same drives available.
On a side note, I have these in an external enclosure to a mini-SAS cable, so I plugged it into my proxmox server as well, and all drives showed up there no problem, so I don't believe it to be a device issue. Using this on a QNAP TL-D400S, not sure if that makes a difference here.