Repartition - destructive?

Hello,

We deployed many remote routers without partitions; I would like to implement partitions to provide some redundancy in event of a failed upgrade. When I read the page on partitioning, it says it will “reformat the NAND” - I assume this destroys any config currently on the device? Can anybody confirm?

Thanks.

I did it many times and never happened anything bad. Just make sure you have enough space…