2008 MacBook Air Rev B, Trim Support "NO" WHY?!

Discussion in 'MacBook Air' started by bbotte, Jul 20, 2011.

  1. bbotte macrumors 65816

    bbotte

    Joined:
    Feb 11, 2008
    Location:
    USA
    #1
    I have an Apple SSD, why don't I have TRIM support? Can I enable it somehow?
     

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  2. KPOM macrumors G5

    Joined:
    Oct 23, 2010
    #2
    Back in 2008, not many SSDs supported TRIM. It requires hardware as well as software support.
     
  3. bbotte thread starter macrumors 65816

    bbotte

    Joined:
    Feb 11, 2008
    Location:
    USA
    #3
    But I thought TRIM works with all the SSD MacBook Airs in Lion? If not where is the cutoff? 2010?
     
  4. KPOM macrumors G5

    Joined:
    Oct 23, 2010
    #4
    Perhaps some of the later 2009 model SSDs would work with TRIM. I had a Rev B with the SSD, and when I switched to the Rev D last year, I noticed a BIG performance difference. SSD technology changed rapidly between 2008 and 2010. It didn't become standard on the MacBook Air until 2010, so that may be why there is confusion as to which SSDs are compatible.
     
  5. clyde2801 macrumors 601

    clyde2801

    Joined:
    Mar 6, 2008
    Location:
    In the land of no hills and red dirt.
    #5
    Google your ssd and see if the drive itself supports TRIM. If so, go to the mac pro section and look for trim enabler by cindori.
     
  6. WardC macrumors 68030

    WardC

    Joined:
    Oct 17, 2007
    Location:
    Fort Worth, TX
    #6
    I would believe this might have something to do with the older SSDs being PATA and the newer SSDs being SATA. The Toshiba SSDs that are used in the MacBook Pros all support TRIM. The SSDs in the iMacs (BTO option) are Toshiba and support TRIM as well. The Blade SSDs in the Rev D and the new 2011 are also Toshibas and SATA-based and support TRIM.

    The older SSDs used in the RevB and RevC MacBook Airs were NOT Toshiba and they were NOT SATA II as I understand, and this leads me to believe that this is the reason they don't support TRIM.
     

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