I've got a Netgear ReadyNas Duo v2 (2 disk slots). System is configured with X-RAID which does not provide flexibility but automatically expands based on a sort of RAID-5 logic.

I had 2 500 GB hard disk installed, redundant, so I had 500 GB of volume size.

I wanted to upgrade the whole system to 3 GB * 2 hard disk maintaining both the data already on the NAS and the data on one of the two 3 TB hard disks. So I did this:

1. Unplugged one disk from the ReadyNas. Now the readynas has 1*500 GB non redundant.
2. Plugged one empty 3 TB hard disk. Now the readynas has 1*500 GB + 1*3 TB, redundant. I waited for the resync.
3. I then unplugged the 500 GB hard disk, so that I have only the 3 TB hard disk with the previous data.

Now what I want is to copy the data on my other 3 TB hard disk in the NAS, so that I can plug this other disk in the NAS and use it for redundancy.

The problem is that: the NAS has the (single) 3 TB hard disk in X-RAID, but the volume does not expand to 3 TB, it remains fixed to 500 GB.

Is there a way to tell the ReadyNas to force expanding the volume to the whole disk without plugging in another hard disk of the same size?