TRIM+UASP USB3.0 or Thunderbolt?

Discussion in 'Mac Accessories' started by dingobiatch, Sep 11, 2014.

  1. dingobiatch macrumors member

    Jan 29, 2009
    I want to change my external drives for my Mac Pro (late 2013, UASP supported) over to SSD's. I don't understand much about TRIM, but the drives I would be getting are Samsung 840 Pro 1TB's, and from what I've read, TRIM is important.

    However, everywhere I've looked online says USB3.0 UASP does not support TRIM. Well, the question then is, does Thunderbolt? What Thunderbolt enclosure will support TRIM?
  2. ColdCase macrumors 68030

    Feb 10, 2008
    Thunderbolt supports all SATA commands including trim as well as others like NCQ which improve disk performance. As far as I know all TB enclosures support trim, but you do have to configure/hack the MacOS to enable it (a few terminal commands or an app).

    The next generation USB3 may support more SATA commands.
  3. dingobiatch thread starter macrumors member

    Jan 29, 2009
    So to clarify, current USB3 doesn't support trim right?
  4. SaSaSushi macrumors 68040


    Aug 8, 2007
    Takamatsu, Japan
    That is correct. USB3 does not support TRIM commands.

    As mentioned, Thunderbolt has full support for TRIM. It can be enabled using Trim Enabler or Chameleon SSD Optimizer.

    I use the Delock 42490.
  5. matreya macrumors 65816


    Nov 14, 2009

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