I have two drives for my DNS-321. I put one in, formatted, copied all my data to it. I now want to install the 2nd drive and set it up and a 2nd volume (I want to store daily snapshots on it). But I couldn't figure this out in the web GUI. It seemed like it would let me change the RAID setting (Tools->RAID) to RAID, JBOD, or single disk. But it doesn't let me choose which drive and it seems like it is going to re-format the previously set up drive which I'd like to avoid.
Am I missing something?
Unrelated: I noticed once I plugged in the 2nd drive that the new drive was labeled "left" and the previous drive, which was labeled "left", is now labeled "right". Weird. Makes me nervous, I think I'm just going to go by serial numbers from now on.