I woke up this morning to the sound of my PS4 making a groaning / whirring sound. I ejected the disc that I had left in there but that didn't stop sound. I then restarted my PS4 but that didn't stop at either. I am not sure if this is normal and I can't recall hearing this sound before today. I haven't been paying too much attention to the sounds my PS4 has been making so it is entirely possible this is been going on for a while. When I first woke up I thought it was the sound of my house settling. I found out it was the PS4 when I started moving closer to it. Any ideas as to what this might be? Should I be concerned? Please let me know if you need any other details.