Mac Mini w OEM SSD - will TRIM be enabled if I add a second SSD?

Discussion in 'Mac mini' started by seismick, Nov 19, 2014.

  1. seismick macrumors member

    Joined:
    Oct 14, 2013
    #1
    A question for those of you who are TRIM/SSD experts:

    I have a 2012 Mac Mini that was BTO with an SSD. It's running 10.10.1. I'm contemplating adding a second (3rd-party) SSD, but the kext signing issues with TRIM enabler in Yosemite have given me pause. However, from what I gather, TRIM is all-or-nothing (i.e. you can't select which drives receive TRIM commands and which do not). So, if TRIM is already enabled for the OEM SSD, TRIM should also be enabled if I add a second SSD, right? Has anybody tried this?
     
  2. macaron95 macrumors regular

    Joined:
    May 5, 2014
    #2
    trim will apply on all SSDs the software founds for which it isn't active yet
     
  3. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #3
    It will only be enabled for the Apple OEM SSD.
     
  4. BeamWalker macrumors 6502

    BeamWalker

    Joined:
    Dec 18, 2009
    #4
    I never used the trim enabler. I am using a Samsung SSD in my Macbook Pro for nearly 2 Years now and I never had a problem with it. Is there really a noticeable difference ?
     
  5. seismick thread starter macrumors member

    Joined:
    Oct 14, 2013
    #5
    Has anyone actually tried this? To be clear, I am not looking to replace my OEM SSD with a larger one - I simply would like to add a second one in the unoccupied drive bay. I realize that it is possible to install SSDs in Macs without enabling TRIM, but I don't think I'll go to the trouble unless the presence of the OEM SSD "forces" TRIM onto the second drive.
     
  6. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #6
    What one SSD can do and has doesn't equate to what the other can do and has. The OEM SSD will not give the non-OEM SSD TRIM.
     
  7. Tinmania macrumors 68040

    Tinmania

    Joined:
    Aug 8, 2011
    Location:
    Aridzona
    #7
    TRIM is not all-or-nothing. It is per-drive.

    Ergo, as (most) others have pointed out the OEM SSD has no bearing on an added 3rd-party SSD.

    What is all-or-nothing, sort of, is turning off of the kext-signing that is required for Trim Enabler to work.



    Michael
     
  8. cinealta macrumors 6502

    Joined:
    Dec 9, 2012
    #8
    TRIM is per drive. The Apple OEM SSD will have the necessary Apple drivers to enable TRIM. The other SSD will have a 3rd party driver and not an Apple driver so TRIM will not work automatically. There are workarounds to still using it with a 3rd party SSD and Yosemite.
     
  9. seismick thread starter macrumors member

    Joined:
    Oct 14, 2013
    #9
    I was misinformed about the all-or-nothing thing. I'll be sitting tight for now as I'm not interested in disabling kext signing. Thanks to all.
     

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