ST2000DL003 Barracuda - 2TB

Update: I've backed up the contents and took out the old 750GB disks. I then put in one of the new ST2000DL003 and booted it up (wanted to make sure that the disk is recognized and works before I open up the others to avoid restocking fees if I had to return them). The NV+ booted up fine and initialized the one disk without any issues (usable space: ~1.8TB). Ok so it looks like the ST2000DL003 are working fine.

I powered off the NAS and put in the remaining three ST2000DL003s. I booted up the NAS and saw that it recognized all 4 disks and was initializing Disk 2. I wasn't sure if I did the right thing putting in the one lone disk at first so I went ahead and did a factory reset now. I powered off the NV+, held down the reset pinhole and booted the NV+ back up. I released the reset pinhole after 10 seconds and it proceeded to do a fatory reset.

It recreated the first disk and started to initialize disk 2 (the same thing that happened right before factory reset). Does it do one disk at a time or should all of them initialize at once? It sounds like everything is going fine but I just wasn't sure if it's still supposed to do this one-by-one. I left it alone last night and let it do it's thing... Haven't checked this morning but I will later this afternoon. I will update with the status tonight.