About to install Dual SSD's .. Can somebody explain to me about "TRIM"?

Discussion in 'MacBook Pro' started by lip5016, Sep 23, 2014.

  1. lip5016 macrumors regular

    Jul 11, 2014
    Hey guys, I'm just about to receive 2x Samsung 850 Pro 512gb SSD's for my Late 2011 MacBook Pro .. This will be my first time installing to a laptop, but not my first experience under the hood of a computer.. I don't really know anything about "TRIM" or "TRIM Support", and this is my first SSD that I'll be owning.. I have been reading that it is beneficial to have/use/download something called "TRIM" or "TRIM Support" when installing 3rd party SSD's because they run cooler/more efficient or something?

    I've attached the spec. sheet from the Samsung 850 Pro I'll be receiving in a few hours, which says:

    Trim Support: Yes (Requires OS Support)

    I really have no idea what TRIM is or if/how/when/where/why I should use it.. Basically, I'm going to be replacing the main, internal MacBook Pro HD, as well as using the OWC Data Doubler to be able to use a 2nd SSD in my SuperDrive/optical bay.. I plan on doing a complete/fresh install once I put in these 2 new drives, along with upgrading the RAM to 16gb (2x8gb ddr3 1333hz)..

    Can somebody please give me some direction on this subject? My main questions are:

    1. What is "TRIM" Support?
    2. Is it necessary to use on Late 2011 MacBook Pro OSX 10.9.5?
    3. Where do I download "TRIM"?
    4. How do I install "TRIM"?
    5. What benefits/disadvantages would I have in using "TRIM"?
    6. Do I need to install anything if my Samsung 850 Pro 512gb has TRIM support (but requires OS support)?

    Could really use some help on this matter! Thanks everyone! :)

    Attached Files:

  2. awests macrumors regular

    Jul 24, 2014
    Bay Area, CA
    1. Google is your friend here, I would try and give my own explanation, but its probably wrong. Basically, it keeps your SSD's healthy.
    2. Yes, you should have TRIM
    3. Download "TRIM enabler" by Cindori, its free (you can purchase the full version, it has a few more features). It has the ability to enable/disable TRIM on your SSD's.
    5. This will be answered when researching 1.
    6. Your SSD has TRIM support, so don't worry about installing anything specific onto the hard drive besides TRIM enabler.

    One last thing, OSX 10.10 has some issues with TRIM and 3rd Party SSD's. Currently TRIM Enabler can work around these issues. The forums on Cindori's website has a thread about TRIM and Yosemite.
  3. poiihy macrumors 68020


    Aug 22, 2014
    Trim (computing)
    From Wikipedia, the free encyclopedia
    For other uses, see Trim (disambiguation).
    A Trim command (commonly typeset as TRIM) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.[1]

    Trim was introduced soon after SSDs started to become an affordable alternative to traditional hard disks. Because low-level operation of SSDs differs significantly from hard drives, the typical way in which operating systems handle operations like deletes and formats resulted in unanticipated progressive performance degradation of write operations on SSDs.[2] Trimming enables the SSD to handle garbage collection overhead, which would otherwise significantly slow down future write operations to the involved blocks, in advance.[3]

    Although tools to "reset" some drives to a fresh state were already available before the introduction of trimming, they also delete all data on the drive, which makes them impractical to use for ongoing optimization.[4] More recent SSDs will often contain internal idle/background garbage collection mechanisms that work independently of trimming; although this successfully maintains their performance even under operating systems that do not (yet) support Trim, it has the associated drawbacks of increased write amplification and wear of the flash cells.[5]

  4. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    1) Google it please

    2) No, it's not necessary, but highly recommended.

    3) You don't need to download it. It's already included in OSX 10.9.5

    4) You can't install it. You can only activate it (e.g. by Trim Enabler as suggested by awests.

    5) Reduce your SSD's unnecessary work load in order to increase performance and life span.

    6) No (apart from some 3rd party software to activate TRIM, and you may delete them after TRIM activated). If you decided to do it manually (e.g. via terminal), there will be absolutely nothing to install for TRIM.

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