Possible?: Upgrading from Duo v1 to NV+ v2

While you can simply "pop in your old drives" into an NV+ v1, you cannot do so with an NV+ v2. There are currently three families of ReadyNAS units in existence. The three are differentiated by the processor. The original family that started in 2004 ended with the end of production with the NV+ v1 and Duo v1. This family has the Infrant Sparc processors. (Infrant was the originator of the ReadyNAS units). The second family are those powered by Intel x-86 chips and are referred to as x-86 units. This family started with the original Pro (6 bay unit) and followed with the NVX (4 bay unit). These units have been discontinued by were replaced by newer updated x-86 based units, the Ultra, Ultra Plus and Pro series and each series has a 2, 4, and 6 bay model. The third family is the newest and is based on Marvell's ARM processor and includes the Duo v2 and NV+ v2.

You cannot simply move the drives from one family to another without the new host completely wiping the drives of all data and reformatting. Nor, can you move them to another brand for the same reason.

Depending on how much data you have, you could purchase one drive for the NV+ v2, copy your data over and then add your old drives to expand the array. However, this is somewhat risky for if there is a problem, all of your data is in one location. Another way would be to not only purchase the new drive for the NV+ v2, but also to back up the data before you did remove the drives from the Duo. Before moving the old drives to the NV+ v2, you should check to make sure the drives are on the Hardware Compatibility List (HCL) for the NV+ v2. If they are not, then you will have to purchase all new drives for the NV+ v2. However, you could then use the Duo as a backup target for the NV+. NAS to NAS backup is the fastest way to do a backup and can be scheduled so you don't have to worry about it.