SSDs are completely silent. The Sudden Motion Sensor is only for spinning drives with movable heads. There is nothing moving inside a SSD except electrons.I am getting a rMBP (1st one defective), and I used to have a 2010 MBP, it would always make a click noise when I move it or just aciddentlay push it. I heard it was motion sensor so it wont crash, do the ssd's do the same?
Note: Computers with Solid State Drives (SSD) or Flash Storage do not use SMS as the drives have no moving parts.