RN102 and single disk upgrade

nasischijf wrote:
Do you think I can remove the 1TB, insert the 3TB, factory default the NAS. Then, insert the 1TB (in situ) and copy the data internally to the 3TB and remove the 1TB. Or, would the fact that the 1TB contains some OS stuff make it impossible?

I think I've found the answer myself :D

How do I migrate a volume on my ReadyNAS OS 6 desktop storage system? http://kb.netgear.com/app/answers/detail/a_id/22895

You can migrate a volume from one ReadyNAS OS 6 storage system to another, as long as you migrate every disk in the volume. For example, if you want to migrate a volume that contains two disks, you must add both disks to the new system. If you add only part of a volume to the new system, the system recognizes the disk as a degraded volume. If your ReadyNAS storage system is operating with one or more disks, you can add disks while the system is running. The new system recognizes the migrated volume and its data

So, I should just Factory Default the device with the 3TB disk and config as a FlexRaid volume. Insert the 1TB disk after configuring and copy the data. I think this should work, I'll post my result!