Snow Leopard Optimization for SSD?

Discussion in 'MacBook Pro' started by tejota1911, Sep 10, 2009.

  1. macrumors 6502

    Joined:
    Nov 10, 2006
    #1
    I have a 2.26GHz 13"MBP, and I just ordered the intel 160GB Gen2 SSD for it. I'm curious if there are any changes I should make in Snow Leopard to optimize it for the SSD. I did some searching and saw that a lot of people are disabling the Sudden Motion Sensor in the Terminal. Are there any other things I should do? Also, I plan on doing a fresh install on the SSD, not cloning my existing drive. Will the SL Upgrade DVD that Apple sent me do the job, or will I need to first install Leopard, off the DVD that came with the MBP, then install SL? When I first install the intel SSD, will it be recognized, or do I need to format it a special way to get it to show up? Thanks in advance. I'm just trying to get everything squared away before the SSD arrives, so that I can do it right the first time.

    Also, I don't know if this matters or not, but I DO have the 1.7 Firmware Update installed.

    Compiled List Of Suggestions:
    1. Disable Sudden Motion Sensor
    http://support.apple.com/kb/HT1934
    2. Uncheck "Put the Hard Disk to sleep when possible", under Energy Saver in System Preferences.
    3. "noatime" *Check OCZ Forum for How-To.(I haven't decided if I am going to do this one.)
     
  2. Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #2
    What's the advantage if disabling the sudden motion sensor for SSDs? I don't see why you'd need or want to do that since SSDs have no mechanical parts.
     
  3. macrumors 6502

    Bostonaholic

    Joined:
    Aug 21, 2009
    Location:
    Columbus, Ohio
    #3
    Since the SSD doesn't have moving parts, the motion sensor is useless. So disabling it will remove 1 (or more) process(es)--possibly freeing up some resources.

    I'm not sure how the motion sensor works i.e. if it's controlled by the OS or strictly hardware but if it is controlled by the OS, with the motion sensor on, if it is triggered by a "sudden movement", the OS would stop reading from the HD--which would be useless when using a SSD.
     
  4. macrumors 6502a

    fehhkk

    Joined:
    Jun 11, 2009
    Location:
    Chicago, IL
    #4
    Agreed! ^^.

    If you placed your SSD in the optical drive SATA port, I believe the sudden motion sensor doesn't apply there.

    I have this disabled, since my SSD is on the regular HDD drive bay. Disabling it is a good idea, in my opinion.
     
  5. macrumors regular

    TIGOS

    Joined:
    Aug 25, 2007
    Location:
    Sao Paulo, BR
    #5
    Well... how i do this? :D
     
  6. macrumors 6502a

    fehhkk

    Joined:
    Jun 11, 2009
    Location:
    Chicago, IL
    #6
  7. macrumors regular

    TIGOS

    Joined:
    Aug 25, 2007
    Location:
    Sao Paulo, BR
    #7
    Thanks!
     
  8. macrumors regular

    tenderidol

    Joined:
    Sep 5, 2009
    #8
    Thanks! I didn't know about that... I am also gathering as much info as possible about installing an SSD into my 15uMBP while waiting for the Intel G2 160GB drive to arrive.
     
  9. macrumors 6502

    sascha h-k

    Joined:
    Apr 26, 2004
    Location:
    vienna / austria
    #9
    dissable motion sensor and no sleep in energy-safe pane is a MUST !

    beside this: "noatime"; visit ocz osX forum for a how to do ..
     
  10. macrumors regular

    tenderidol

    Joined:
    Sep 5, 2009
    #10
    Thanks. Will include that in the "SSD preparation list". Anything else?
     
  11. macrumors 6502

    Bostonaholic

    Joined:
    Aug 21, 2009
    Location:
    Columbus, Ohio
    #11
    Will there be a compiled list somewhere? Maybe the OP? If I'm getting my SSD in about a month, I don't want to have to search through this thread (which may be pages long by then) in order to find everything.
     
  12. macrumors 6502

    sascha h-k

    Joined:
    Apr 26, 2004
    Location:
    vienna / austria
    #12
    yes, as posted: noatime

    it's done in several minutes via terminal and so please look into the ocz forum to find the strings to copy/paste;

    so nothing bad will happen ..
     
  13. macrumors 6502a

    fehhkk

    Joined:
    Jun 11, 2009
    Location:
    Chicago, IL
    #13
    Screwdriver #00 for the bottom case screws
    Torx mini T-6 (or some heavy duty pliers) for the hard drive mounting screws.

    :)
     
  14. macrumors regular

    pgharavi

    Joined:
    Nov 25, 2004
    #14
    I'm having terminal issues. I only have my default (admin) account. There is no password. In other words, whenever I am prompted for a password, I just hit enter.

    In Terminal, when I try to do the command described here, it tells me that my password is incorrect.

    Anyone know why?
     
  15. macrumors member

    Joined:
    Jul 6, 2009
    #15
    Isn't the Sudden Motion Sensor a hardware thing, mainly? Turning it off would yield negligible performance boosts.

    What does preventing the disk from sleeping do for the SSD? (Apart from the obvious)
     
  16. macrumors 6502

    sascha h-k

    Joined:
    Apr 26, 2004
    Location:
    vienna / austria
    #16
    sudden motion sensor "on" dirsturbs when playing a movie, even when there is "no motion" of the machine ..

    it's not for speed reason (when off)
     
  17. macrumors 6502a

    Joined:
    Jul 30, 2009
    #17
    Possibly if you trigger it, it causes the SSD to stop reading/writing because the SMS can't tell the difference between a SSD and HDD...

    Also why turn off put the hard drive to sleep? Just curious.
     
  18. macrumors regular

    Joined:
    Jan 28, 2008
    Location:
    Hong Kong
    #18
    I think it has to do with some SSDs fail to wake up upon sleeping.
     
  19. macrumors newbie

    Joined:
    Jun 14, 2009
    #19
    I've got a MBP (3, 1) with a Crucial 256GB SSD (M225) as the internal boot drive w/SL 10.6.1. I've tried repeatedly to turn off Sudden Motion Sensor w/no success via Terminal. "About this Mac" still continues to show it as enabled. I also unsuccessfully tried several utility programs (such as Cocktail & MacPilot) to help turn it off. Any ideas?
     
  20. macrumors 68000

    disconap

    Joined:
    Oct 29, 2005
    Location:
    Portland, OR
    #20
    You could disable spotlight indexing, I'm betting that might speed things up a bit.
     
  21. macrumors 65816

    mackmgg

    Joined:
    Nov 2, 2007
    #21
    The only problem with disabling the SMS, is there goes programs like iAlertU
     
  22. macrumors 6502a

    Craiger

    Joined:
    Jul 11, 2007
    #22
    I think to use sudo command you MUST have a password. An empty string won't work.
     
  23. macrumors newbie

    Joined:
    Sep 26, 2006
    #23
    just out of curiosity what's noatime?
     
  24. macrumors member

    Joined:
    Sep 14, 2009
    #24
    If the TS is looking at taking out his old HDD, and replacing the optical drive with it, then there is a lot more to do. The SSD is very straightfoward if the HDD is to be removed entirely from the machine.
    http://forums.macrumors.com/showthread.php?t=680228
    This post is choke-full of goodness on the SSD/HDD setup.

    Otherwise, the Intel ssds are flawless bits of hardware. I have not run into a single problem with mine.

    On this note about having an extra HDD in the optibay along side an SSD, does anyone know a method of getting sudden motion sensor to work for the optibay HDD? I've been trying to figure this out for a while, as the HDD always comes to a shrieking halt when restarting or when ejected.
     
  25. macrumors regular

    Joined:
    Jul 12, 2008
    #25
    Just put my Intel X-25M 160GB in my June MBP, best thing I ever did. Disabled SMS and the sleep feature right away. Also updated the firmware. Gotta love 18 second boot times. :)
     

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