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PostPosted: Thu Dec 10, 2015 8:43 pm 
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I guess it's pretty easy to do now. As I understand it just
Code:
sudo trimforce enable
in terminal. I ask because I'm reading a lot of conflicting info on the interwebs. The SSD in question is a Samsung 250 GB 850 EVO. I called Samsung SSD tech support and presented the same question, he said definitely enable it. As I'm typing this it feels like a familiar conversation....

What say ye, to trim or not to trim?


BTW, right now it's enabled. I'm not certain one can immediately (or ever) detect the difference???


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PostPosted: Thu Dec 10, 2015 9:03 pm 
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Far rom any expert here, but TRIM just seems to do extra writing, & it seems most modern SSDstake care of trim functions by themselves..

http://www.zdnet.com/article/os-x-yosem ... d-to-know/


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PostPosted: Fri Dec 11, 2015 6:38 am 
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All SSDs can still benefit from TRIM, except Sandforce/LSI based SSDs, which have their own aggressive garbage collection done internally by the SSD's processor. The EVO should definitely have TRIM enabled. It's a TLC SSD, not an SLC or MLC SSD, and as such will slow down faster without TRIM enabled.

Again, the only SSDs you shouldn't enable TRIM for are those using Sandforce or LSI controllers. The rest it won't hurt.

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PostPosted: Sat Dec 12, 2015 4:05 pm 
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Would the same apple to the the Evo Pro? I have one in the wife's MBP 8.1.

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PostPosted: Sat Dec 12, 2015 6:08 pm 
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Avon B7 wrote:
Would the same apple to the the Evo Pro? I have one in the wife's MBP 8.1.


There are no EVO Pros. There's the EVO line, and the Pro line. EVO uses TLC and Pro uses MLC. Trim should be enabled on either, yes.

A warning for you if any of your EVO drives are of the 840 series: Samsung has had issues where the voltage reading algorithms were incorrect/unreliable and the drive would slow to literally 3 MB/sec for reads and far, far less for writes. If your EVO is an 840 series and you have this problem crop up, you'll need a PC to fix it as Samsung's tool does not boot properly on a Mac as legacy mode prevents AHCI from being enabled. To the best of my knowledge no permanent fix was ever found. The problem does not AFAIK exist in the 850 EVO series as Samsung switched to a different controller for those.

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PostPosted: Sun Dec 13, 2015 6:39 am 
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Yes, sorry for the mix up. Thanks for the clarification.

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PostPosted: Sun Dec 13, 2015 6:41 pm 
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There are six heavily used systems at work with Samsung 850 Pros that don't have TRIM enabled and I've not detected any difference in performance on them. At least one has filled up almost completely a couple times.

I'm ideologically opposed to TRIM because it violates the logical separation of layers in a block storage device. At the moment, the average drive will still benefit from TRIM, but as more sophisticated drives are released the benefit is getting smaller or going away entirely. In the end, several years from now, TRIM will be remembered as an ugly short-lived hack to work around the technological quirks of a single storage technology.

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