Ready for expansion (RN Pro Pioneer Edition)-Seeking Advice

mdgm wrote:
Update the firmware if you haven't already. You must be running 4.2.16 or later before you add the 3TB disks. Add a 3TB disk while the NAS is on. Wait for the resync etc. to complete then add the next disk. What disks were installed when you last did a factory default? Note that if your volume capacity was 2.7 TB when you last did a factory default you cannot expand past 10.7 TB

Yes my firmware had been updated.

I bought a brand new diskless RNPE then put in 4 1TB's in XRAID DUAL-REDUNDANCY giving me about 1.8TB capacity. As StephenB mentioned above:

There are two expansion limits (a)you can't exceed 16 TiB total volume size. That wouldn't apply to you until someone makes > 8 TB drives. (b) You can't grow a volume more than 8 TiB over its lifetime. If you started with this configuration, you could expand up to 4x5TB. So you have plenty of headroom.

Question. What would have happened if I had went ahead and installed both brand new disks into bays 5&6 while the unit was off and then turn the unit on?