I have just bought a brand new NV+ and installed two 3TB drive, but only 742GB are recognised from them.
I saw another chap had a similar problem (http://www.readynas.com/forum/viewtopic.php?f=24&t=62052), but there didn't seem to be a solution for him.
This is a brand new device with brand new disks. I have already done one full factory reset, and the drives are still not recognised as 3TB drives. Is there a way of forcing my NV+ to format the drives with GPT instead of MBR? It seems rather counter-productive if I have to format the drive with GPT in windows before it will work in my nas box.