Sudden Motion Sensor - disabled / original SSD

Discussion in 'MacBook Pro' started by Konqi, Aug 26, 2011.

  1. Konqi macrumors newbie

    Sep 14, 2010

    if you order a MBP with the original Apple SSD: is the sudden motion sensor enabled?

  2. tatical macrumors member

    Jun 7, 2009
    Yes, its enabled by default with an Apple SSD.

    Find the current status of Sudden Motion Sensor:

    1. From the Finder's Go menu, choose Utilities.
    2. In the Utilities folder, open Terminal.
    3. When the command line appears, type sudo pmset -g and press Return.
    4. Type in the administrator password when prompted and hit Return. This command queries the computer for the current setting of the Sudden Motion Sensor, which you can determine by locating the ams entry (in Mac OS X 10.3) or the sms entry (in Mac OS X 10.4, 10.5, 10.6, and 10.7) and looking to the right to determine its value. The default setting is "1" (turned on).

    Disabling the Sudden Motion Sensor in Mac OS X 10.4, 10.5, 10.6, and 10.7:

    1. In Terminal, which should still be open from the previous step, you can disable the Sudden Motion Sensor by typing sudo pmset -a sms 0 and pressing Return (changing the setting to a zero disables the module).
    2. Type your administrator password when you are prompted and press Return.
    3. Type the sudo pmset -g command again to be sure that the setting has been applied.

  3. jon08 macrumors 68000

    Nov 14, 2008
    So is it recommended to keep the SMS on for any kind of SSDs in Macbook Pros? Or is it better to disable it?
  4. Steve's Barber macrumors 6502a

    Jul 5, 2011
    Disable it. There are no moving parts on a SSD so detecting "motion" is pointless.
  5. jon08 macrumors 68000

    Nov 14, 2008
    Does not disabling it bring any disadvantages at all though?
  6. GGJstudios macrumors Westmere


    May 16, 2008
    No. It's meaningless with a SSD.
  7. Steve's Barber macrumors 6502a

    Jul 5, 2011
    Yes. If you put in a conventional hard drive again you need to remember to enable it again. :)
  8. jon08 macrumors 68000

    Nov 14, 2008
    Okay. And as far as SMS is concerned - is it 100% proven that it only works for the main HDD bay and not the Optibay as well?
  9. thundersteele macrumors 68030

    Oct 19, 2011
    sudo is not required for the "pmset -g" command. Users have access to this information too.
  10. miker2209 macrumors regular


    Jan 2, 2010
    I don't know about the others, but my 13" 2011 MBP has SMS for my OptiBay HDD and it works 100% tested.

Share This Page