I just discovered that the Sudden Motion Sensor if you don't disable it actually works with the HDD in the Optical Bay Slot! I was in the process of putting my laptop on my desk just now, as I was bring it down fast I heard the SMS working as it did when I only had the HDD in my MBP! That is amazing news knowing SMS works regardless what the location of the HDD is within the MBP🙂 I can confirm this that the SMS is working for my HDD is because while I was moving my laptop I was watching a video located on my HDD, It paused and I tried this 2 times both times same result🙂