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flowrider

macrumors 604
Nov 23, 2012
7,232
2,962
I know that in system profiler I see that TRIM SUPPORT: YES is shown, however, does the drive automatically process TRIM functions or is using a program such as Disk Sensei from @Cindori for the auto trim or manual trim still required and/or beneficial?

No. Trim support is just that. When Trim is enabled either by a third party utility (Trim Enabler), native in the OS (Apple SSDs), or by a terminal command (OS 10.10.4) the result to the SSD is the same. The Trim routine is active.

Lou
 

flowrider

macrumors 604
Nov 23, 2012
7,232
2,962
Now, my question is, does this issue affect OS X's handling of TRIM? The Linux pages describing it suggest it affects both Linux and OS X, but some people point out that OS X's implementation of TRIM on HFS+ doesn't use queued TRIM commands either.

I have been using Trim on my four Samsung SSDs since my first series 840 in September of last year. I have lost no information or data on any of my drives using Trim, either with Trim Enabler, Disk Sensei, or the Trimforce command. I have not read of any Macintosh user with a third party SSD of any make being injured by any sort of data corruption when using Trim.

Lou
 
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Taz Mangus

macrumors 604
Mar 10, 2011
7,815
3,504
I know that in system profiler I see that TRIM SUPPORT: YES is shown, however, does the drive automatically process TRIM functions or is using a program such as Disk Sensei from @Cindori for the auto trim or manual trim still required and/or beneficial?

I have a Apple OEM SSD in my iMac. After the 10.10.4 update the "Trim Supported" field is no longer shows up when I look under System Report storage.
 

Old Muley

macrumors 6502a
Jan 6, 2009
761
188
Titletown USA
So far so good, at least on my 2010 MBP. I had installed a Samsung 840 about a month ago, so it's nice to get trim enabled. On my iMac, I'm having less success. Attempts to download via the update are not working, and when I tried using the combo updater, the updater hangs. I guess I'll keep trying later on.
 

snifferdogx

macrumors member
Apr 12, 2015
73
12
Melbourne, Australia
Worked for me!
Screen Shot 2015-07-02 at 5.55.31 pm.png
 

Cindori

macrumors 68040
Jan 17, 2008
3,527
378
Sweden
Would @Cindori or anybody else with knowledge of OS X's inner workings with HFS+ and TRIM please clear up the confusion with Samsung 8xx series and some Crucial SSDs?

Apple's Trim driver is closed source, but it is believed so far that Trim on OS X is not using this new queued implementation, and that this warning message is instead referring to very early Sandforce SSD's (from the beginning of Trim in OS X, around 2008-2009). These drives did have notable issues when using Trim in OS X, for example boot or emptying trash taking forever (>3 minutes). Just speculations at this point.
 

Tigerman82

macrumors 6502
Jul 27, 2010
257
32
I have an Early-2009 Mac Mini with 64GB Crucial M4 SSD (apparently had some problems with TRIM before latest FW which I have) and a Mid-2010 iMac with 256GB Samsung 830 SSD (many say works fine without TRIM). With the Mac Mini I used TRIM (via terminal hack) prior to Yosemite and with the iMac I've never used TRIM.

So which would be the best route to take right now?

  1. Forget about TRIM and continue using these computers without it like I've done for a while now
  2. Take advantage of the 10.10.4 TRIMFORCE command and possible get slightly better performance and longevity while taking a small risk of data corruption in the long run
  3. Pay $19 for Disk Sensei, enable TRIM via the app and get a good app (although I've done okey without such an app so far) and possible better performance
I'm sure Disk Sensei is an excellent app but I do want to make sure that for $19 I actually get something that I wouldn't get with free commands/apps (oh and I do have the combination of DaisyDisk/Onyx).
 

Cindori

macrumors 68040
Jan 17, 2008
3,527
378
Sweden
I'm sure Disk Sensei is an excellent app but I do want to make sure that for $19 I actually get something that I wouldn't get with free commands/apps (oh and I do have the combination of DaisyDisk/Onyx).

I'm opening up a 7-day trial mode with the update releasing today. And making the Trim feature free (accessible after trial expired).
 

exi

macrumors 6502
Oct 16, 2012
439
78
I have an older SSD which, of course, supports TRIM -- a Crucial C300.

Used TE for awhile without issues. Reverted to going TRIM-less with 10.10 on its release.

Have used trimforce to enable TRIM without third-party utilities.

Anyone have any thoughts on the safety of doing this given some questions about data corruption with some SSDs? Have not found anything particular to the older Crucial devices like mine.
 

sim667

macrumors 65816
Dec 7, 2010
1,390
2,915
Actually reading up about it, I'm gonna hold off and see if there are any issues for a while.
 

DHKaplan

macrumors member
Jul 10, 2008
70
2
Trim (trimforce) enabled on Samsung 850 EVO 250GN (MacMini 2012), and works OK.

Couldn't it take awhile for any degradation to show up?

I've been using a Samsung 840 EVO with trim enabler for 2 years and have seen no problems.
 

sstyle

macrumors regular
Nov 8, 2010
186
9
Thanks! Another question: my write speed is very low. How can I increase it? Alignment?
 

sstyle

macrumors regular
Nov 8, 2010
186
9
Here is (INTEL 520 Series - 120Gb):
 

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DHKaplan

macrumors member
Jul 10, 2008
70
2
I have a new iMac 5K which I've just successfully upgraded to 10.10.4.

I have an external Thunderbolt drive bay with a Samsung 840 EVO in it, and looking in system profile I can't find it anywhere. (I do see it in finder). I've enabled TrimForce for it, but would like to be able to see it in the profile to verify that Trim is in fact enabled for it. I've looked both in the thunderbolt section as well as the SATA, where of course it doesn't show up. Any suggestions?
 
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