Trim enabler on Yosemite

[Hannah Mackinlay]

I have a 1TB Crucial SSD as my main hard drive on my ageing 2008 8 -core MacPro. which made a HUGE difference and had probably given it quite a few more years of use!

However I had Trim Enabler running under Mavericks but it doesn’t run under Yosemite without removing the increased security 

(see the Trim Enabler FAQ here http://www.cindori.org/trim-enabler-and-yosemite/  )

Now the reason I really had it wasn’t about speed but extending the drive life. ASAIK Apple SSD machines have trim built in but it doesn’t work with third party SSDs unless you get Trim Enabler

Does anyone know or have a  view on whether it really makes a huge difference to SSD drive life without Trim? I can see that there are tiny speed increases by having trim as there is no need to delete before writing (which I don’t care about really) but from what I read last year when I installed trim, it is good practice to have a trim function

Any geniuses out there that have a  view?

Kind regards

Hannah

[Robert Sharl]

There's a good discussion of this on the latest ATP podcast. In short Siracusa says he's not doing the 'allow unsigned extensions' hack that's necessary to run Trim on non-supported SSDs in Yosemite until he sees a clear performance issue. He's not seen that yet.

Robert

Sent from my iPad

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[Hannah Mackinlay]

Thanks Robert

I will leave well alone and cross my fingers! Thanks for the reply

[Ian Collier]

Worth noting that Siracusa has only had his SSD for a number of days! :-)

But a good argument he presents is that trim is based on the idea (hugely simplified) that the OS can know better than the SSD what is going on internally, while at the same time the internals of SSDs have developed hugely in recent years.

So, there is a good reason to think it may no longer be so necessary.

Cheers,

--Ian

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Ian Collier

ian.c...@mac.com

+44 7866 510075

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[Drew Reece]

Can anyone with an Apple SSD confirm if 10.10 still enables TRIM? 

I’d like to believe Apple have solved this issue however if they are still enabling it on their own SSD's I can’t understand why they would do that if it wasn’t necessary.

Isn’t Siracusa using a large SSD (with lots of free space). If the disk is crammed to the gills it would perform badly as he explains, from what I can’t tell, ‘average’ users work right up to the disk full warning :)

FWIW I usually enable it, but I haven’t had the need for it on 10.10 yet (not running 10.10).

Re:co

[Robert Sharl]

On 9 Nov 2014, at 13:22, Drew Reece <dru...@gmail.com> wrote:

Can anyone with an Apple SSD confirm if 10.10 still enables TRIM? 

I’d like to believe Apple have solved this issue however if they are still enabling it on their own SSD's I can’t understand why they would do that if it wasn’t necessary.

I get this under Yosemite on my early 2013 MBP 13” Retina. Does TRIM Support mean it’s enabled, or is there another setting? As I’ve never installed an SSD in anything myself I’ve not played with the configurations.

Robert

APPLE SSD SD256E:

  Capacity: 251 GB (251,000,193,024 bytes)

  Model: APPLE SSD SD256E                        

  Revision: 1027AP  

  Serial Number: 131066402602

  Native Command Queuing: Yes

  Queue Depth: 32

  Removable Media: No

  Detachable Drive: No

  BSD Name: disk0

  Medium Type: Solid State

  TRIM Support: Yes

  Partition Map Type: GPT (GUID Partition Table)

  S.M.A.R.T. status: Verified

[Drew Reece]

From what I can tell 'TRIM Support: Yes' means the drive is using it…

http://appleinsider.com/articles/11/03/04/apples_macbook_pros_ship_with_active_ssd_trim_support_in_snow_leopard.html

Prior to it being enabled it said ‘No’ for Apple SSD’s, the same as 3rd party SSD’s.

It would be nice if Apple put out documentation on it. Windows & Linux seem to enable it where applicable.

Re:co

 

[MullerBiker]

http://blog.macsales.com/21641-with-an-owc-ssd-theres-no-need-for-trim

Appers that you don't need to use trim on the latest SSD's