@Cristian Any chance you are sending the image out to new/different machines than before? We have just received some new machines into our fleet (Lenovo neo 50q Gen 4), and we are seeing something similar…we get 14GB/min on the older machines, but these new machines are at about 2GB/min. I started a thread on that here:
https://forums.fogproject.org/topic/17698/fog-very-slow-to-deploy-image-lenovo-neo-50q-gen-4/2
Not sure if yours is for the same or similar reasons, but if it is, it might help to know if they are the same machines as we just got.
Thanks!