Sudden decrease in SSD speed. (Crucial M4)

Discussion in 'MacBook Pro' started by BeeJee, May 28, 2012.

  1. BeeJee macrumors 6502

    Joined:
    Nov 27, 2011
    Location:
    Long Island/North Jersey
    #1
    Hey guys and gals, I recently purchased a Crucial 256gb SSD when they were on sale a few weeks ago and at first the performance was awesome. But I just shut down my computer and when rebooted it started to act a little funny (my wallpaper was reset to factory) so I ran a disk speed test and the test showed that it is now writing 100mb/s slower than it was just a week ago! I understand that speeds will always vary a little however an almost 50% decrease is unacceptable to me. I hope I'm missing something as I want to get what I payed for and right now its not. Thanks a lot for anybody with any insight on the problem.
     
  2. Ves macrumors member

    Ves

    Joined:
    Jul 22, 2009
    Location:
    Amsterdam, The Netherlands
    #2
    Which firmware version are you one?
    Did you enable TRIM?
     
  3. Donka macrumors 68020

    Donka

    Joined:
    May 3, 2011
    Location:
    Scotland
    #3
    Also, what were you doing prior to the shut down?
     
  4. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #4
    Are putting it to sleep immediately after use perhaps? The M4 uses a method of garbage collection in its controller that runs during system idle time AFTER a lot of write activity. Try disabling sleep and just letting it sit running a couple hours and see if that restores write performance.

    Read over the TRIM section of this review of another drive for an overview of what is going on.
     

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