Removing ghost USB share

Is there any way to get the ReadyNAS to simply call all USB Hard Drives USB_HDD_1? Or get it to let two different USB drives to have the same name?

At present, I rotate between two 2TB identical USB drives for resync backup on my ReadyNAS Duo (sparc), but because the ReadyNAS insists on giving them different names, I have to have two different backup jobs set up that require a lot of manual intervention as only one USB drive is plugged into the ReadyNAS at any one time, as the other is stored off site. It would be much easier (and elegant) if I could just swap the drives and have just one backup job run on schedule to what it thinks is always the same drive. I can sort-of kludge that up by running Clean_USB_Storage every week and setting whichever drive is plugged in to be USB_HDD_1, but again, that's a lot of kludgey manual intervention that should not be necessary.