67      iPhone_iPad_Mac_apple

about enable trim on macOS sierra

hi,

after I upgrade the macos to sierra, operation is not smooth.

So I bought a samsung ssd 850 evo, and I'm going to change the HHD to SSD.

how can I use terminal to enable trim on sierra?

and is it necessary to enable trim for samsung 850 evo ssd ?

I used to do on terminal, on El Capitan:

trimforce enable

but when i did it on Sierra it started freezing for no reason, adn finally stopped working with a HD error detected by Apple Hardware Test. I am not sure if that was the cause but I would suggest NOT TO ENABLE TRIM on SSD on Sierra. My SSD was an Intel 240GB Series 530

To enable trim support in OS-X

Open "terminal app" and enter this command "sudo trimforce enable" select YES, YES and reboot when complete.

Generally, with newer SSDs, TRIM support is not usually necessary. The built-in garbage collection should take care of it.

However, if you fill your SSD with data, and you edit very large files, like movies, images, then the garbage collection may not keep up and TRIM would be helpful.

I used to do on terminal, on El Capitan:

trimforce enable

but when i did it on Sierra it started freezing for no reason, adn finally stopped working with a HD error detected by Apple Hardware Test. I am not sure if that was the cause but I would suggest NOT TO ENABLE TRIM on SSD on Sierra. My SSD was an Intel 240GB Series 530

thanks for your suggestion.

I have "Disk Sensei by Cindori.org" .

I am running Mac OS Sierra 10.12.1 2014 MBP with an apple SSD . What I have noticed and mentioned to Apple tech support is that they no longer show "trim support" for your SSD ( I am sure this is an oversight in the OS ).

El Capitan did have trim support listed in the profile .

Cindori is supporting Mac OS Sierra and I have had no trouble with my system using Disk Sensei for trim .

This is my experience and waive any responsibility for others actions .

What I suggest is to contact cindori support and follow their instructions and recommendations

I sincerely hope this sheds some light on this conundrum

trimforce probably makes a drive system level call, to 'enable TRIM' on the drive. Using a third party tool such as "Disk Sensei" would probably NOT add anything to that process. At most, all it can do is make that same drive system level call that trimforce is already making. In other words, if it doesn't work properly using trimforce, it won't work any better with any other tool.

The one benefit of "Disk Sensei" is that you can enable TRIM via a GUI interface and see the current TRIM status via that same GUI interface.

To view the current TRIM status for your drive via GUI interface without using any third party tools,

navigate to 'About this Mac' -> 'System Report' -> 'SATA/SATA Express' and look in the details for: 'TRIM support'

I disagree. This is from wikipedia: "By 2014, many SSDs had internal background garbage collection mechanisms that worked independently of trimming. Although this successfully maintained their performance even under operating systems that did not support trim, it had the associated drawbacks of increased write amplification and wear of the flash cells.^[5]" - https://en.wikipedia.org/wiki/Trim_(computing)

Wikipedia? Really?

Yes, Wikipedia. My experience has been that it's a fairly reliable secondary source.

Also, as a comparison, Linux generally enables TRIM for SSD drives whenever possible. The primary reason that Apple does not enable TRIM by default for third party SSD drives is probably that they want people to buy their latest laptops that have SSD drives built in, thereby making more of a profit.

Most/all reputable SSD drives should work fine with TRIM enabled, else you would hear a big stink from the Linux community if a particular SSD drive did NOT work correctly with TRIM enabled.

If you want to argue the facts, that's fine, but disparagement by innuendo is not really helpful to the process.

Trim is completely unnecessary on OWC SSD's; it may actually be counterproductive. To TRIM or not to TRIM (OWC has the answer) | Other World Computing Blog

A drive should not have to be told how to take care of itself. It should be self-contained. All it should require is the data to write and the data to retrieve. Every other function should be self-contained.

If you want to argue the facts, that's fine, but disparagement by innuendo is not really helpful to the process.

The primary reason that Apple does not enable TRIM by default for third party SSD drives is probably that they want people to buy their latest laptops that have SSD drives built in, thereby making more of a profit.

Ahh, yes. We wouldn't want any disparagement by innuendo.

Since Apple does not test third-party hardware, it should never enable some esoteric feature that it has no idea of the consequences. They added the capability for the user to enable it if they wish to take the risk.

"A drive should not have to be told how to take care of itself. It should be self-contained. All it should require is the data to write and the data to retrieve. Every other function should be self-contained."

Take a look at this article: Ask Ars: “My SSD does garbage collection, so I don’t need TRIM… right?” | Ars Technica . Basically, it explains how TRIM works *with* garbage collection to improve the performance of the SSD drive.

The underlying issue that TRIM attempts to solve is that, when files are deleted at the O/S level, the SSD drive never sees the delete -- it sees a "series of writes", so it actually does NOT have enough information to optimize page allocation. And this is an issue that *all* SSD drives would run into.

Interestingly, OWC SSD drives would also never see the delete operation as well, so without the TRIM command, it could never optimize as well as an SSD drive that used the TRIM command information.

If OWC SSD drives are not benefiting from the use of TRIM commands, it may be that they're not sophisticated enough to use the TRIM information.

BTW, for future reference, the problem with disparaging by innuendo is that it undermines your credibility and intelligence. Because the disparagement has nothing to do with the point(s) being argued.

Just as yours does.

I think I was trying to raise the level of argument/debate from shin-kicking to a fruitful and productive discussion of the facts. .

"Probably" "Probably Not"

Thanks for making it clear.

最後更新：2017-09-28 15:05:56

  上一篇： SSTP VPN in Mac OS X Sierra

  下一篇： I want to upgrade to iTunes 12.7 on OS X 10.9.5