Trim Enabled... but how do I ACTUALLY Trim?

jambottoms

macrumors newbie
Original poster
Jul 23, 2011
2
0
This may be a silly question, in which case I apologize beforehand.

I've checked, and Trim is enabled for my SSD (came with the laptop, a May 2010 MBP).

The question is, do I actually need to perform a "trim", or does the OS X Lion actively trim the drive? I assumed I had to use Disk Utility, and click "erase free space", but that option isn't active. I'm a bit confused.

Thanks in advance.
 

BiggAW

macrumors 68030
Jun 19, 2010
2,542
171
Connecticut
Glad I saw this thread... I checked and my Mac hasn't enabled TRIM. How do I get it to support TRIM? My OCZ Vertex 2 does support TRIM.
 
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Intell

macrumors P6
Jan 24, 2010
18,883
373
Inside
Glad I saw this thread... I checked and my Mac hasn't enabled TRIM. How do I get it to support TRIM? My OCZ Vertex 2 does support TRIM.
TRIM is only enabled on Apple SSDs. I don't think there is any way to enable it on non-Apple SSDs.
 
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HiFiGuy528

macrumors 68000
Jul 24, 2008
1,850
39
No Trim support for my 2010 MacBook Pro. I have a OCZ SSD and Trim is NOT on in Lion.
 
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Sensamic

macrumors 68030
Mar 26, 2010
2,613
290
I thought I read not too long ago on macrumors news that Lion does enable TRIM for SSDs of other manufacturers. Its not only for Apple SSDs. 10.6.8 enabled TRIM for apple SSDs and Lion for all SSDs that support it.

Windows 7 supports TRIM for all SSDs, so Lion must be no less.
 
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Hugh

macrumors 6502a
Feb 9, 2003
840
5
Erie, PA
I thought I read not too long ago on macrumors news that Lion does enable TRIM for SSDs of other manufacturers. Its not only for Apple SSDs. 10.6.8 enabled TRIM for apple SSDs and Lion for all SSDs that support it.

Windows 7 supports TRIM for all SSDs, so Lion must be no less.
No, Lion does not support TRIM on drives other then Apple Branded drives. There is a third party tweak you can do but it's at your own risk.

Hugh
 
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Ivangf2

macrumors member
Jun 30, 2011
36
3
Seriously guys, do you know if we have to click on erase free space in order TRIM works? Or does it automatically?

:apple:
 
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boshii

macrumors 68040
Jul 6, 2008
3,672
716
Atlanta, GA
I have an Intel X25-M G2 SSD and trim enabler doesn't work for me. I remember reading mixed answers about Intel SSDs supporting trim or not so I'm curious if anybody with an Intel SSD has been able to get it to work.
 
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BiggAW

macrumors 68030
Jun 19, 2010
2,542
171
Connecticut
TRIM is only enabled on Apple SSDs. I don't think there is any way to enable it on non-Apple SSDs.
WOW, that is absurd. Especially considering Apple doesn't even make SSDs, they just take somone else's buy it on a bulk contract and add a little :apple: to the logo.
 
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hehe299792458

macrumors 6502a
Dec 13, 2008
738
1
WOW, that is absurd. Especially considering Apple doesn't even make SSDs, they just take somone else's buy it on a bulk contract and add a little :apple: to the logo.
I should mention that they also happened to have taken one of the slowest SSDs on the market and make it their own.
 
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iThinkergoiMac

macrumors 68030
Jan 20, 2010
2,666
4
Terra
Windows 7 supports TRIM for all SSDs, so Lion must be no less.
Windows 7 supports .exe, so Lion must be no less.
Windows 7 supports any Intel computer you buy, so Lion must be no less.
Windows 7 supports a huge number of viruses, so Lion must be no less.

Windows 7 isn't Lion. Just because W7 does it, doesn't mean Lion does. What kind of logic is that?
 
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ern

macrumors newbie
Jul 23, 2011
25
1
I have an Intel X25-M G2 SSD and trim enabler doesn't work for me. I remember reading mixed answers about Intel SSDs supporting trim or not so I'm curious if anybody with an Intel SSD has been able to get it to work.
Intel X25-M G2 SSD + trim enabler works for me. Lion, MB 466, X25-M G2 160G + 80G
 
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Vapor matt

macrumors regular
Aug 8, 2010
190
0
UK
If you have a SSD with the sand force controller you don't need trim as they have GC built in (garbage collection) and in mac OS X Trim + GC can cause hangs and beach balls ect.


windows GC + Trim ok

Mac OS X GC + Trim = hangs and beach balls!

Check what SSD you have and which controller it has before you enable trim support for it.
 
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makinao

macrumors regular
Dec 27, 2009
242
72
Windows 7 isn't Lion. Just because W7 does it, doesn't mean Lion does. What kind of logic is that?
The same logic that says a Toyota Corolla is not a RedBull RB7 Forumula 1 car. In many ways, they can both get you from point A to point B. But there is a world of difference in the way they get you there.
 
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hekokimushi

macrumors regular
Oct 27, 2008
150
0
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

my OCZ V2 seems to work like a charm with Lion with trim on fw 1.32.

2 gearspins for boot. first available opportunity to read system is up for 14 secs on my MB5,1 no beachballs. very very snappy
 
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MikhailT

macrumors 601
Nov 12, 2007
4,390
965
WOW, that is absurd. Especially considering Apple doesn't even make SSDs, they just take somone else's buy it on a bulk contract and add a little :apple: to the logo.
Not really absurd at all, it’s the only way Apple can be 100% assured that TRIM works on all of the SSDs without paying more for support costs and validations.

TRIM isn’t something that’s automatically stable on Windows platform either, there are plenty of SSDs that have issues with TRIM and IGC.

Eventually once TRIM becomes a part of all SSDs and its maturity is good enough, Apple can enable it for all SSDs. At this moment, it’s not that mature yet.
 
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BiggAW

macrumors 68030
Jun 19, 2010
2,542
171
Connecticut
If you have a SSD with the sand force controller you don't need trim as they have GC built in (garbage collection) and in mac OS X Trim + GC can cause hangs and beach balls ect.


windows GC + Trim ok

Mac OS X GC + Trim = hangs and beach balls!

Check what SSD you have and which controller it has before you enable trim support for it.
hmmmm. Source for that info? I've found questions online to the same effect, but no good info on it. I might be OK them without TRIM since I made a point to get a Sandforce-based SSD.
 
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RJCP

macrumors 6502
Jun 8, 2011
430
39
hmmmm. Source for that info? I've found questions online to the same effect, but no good info on it. I might be OK them without TRIM since I made a point to get a Sandforce-based SSD.
I'm glad I found this thread. I was considering updating my main HD to an SSD drive. I have a late 2008 Macbook Alum. with Lion installed and wanted to get a Crucial 128GB M4 2.5inch MLC SATA 6Gb/s Internal SSD Hard Drive.

So, as far as I get it, Lion won't automatically enable TRIM which basically means that if I installed an SSD drive and didn't run the commands to enable TRIM, I'd have my drive failing me after a short while.

I know that Crucial provides regular firmware updates to their SSD's. I wonder if any of these Firmware updates makes TRIM start to work on Lion.

Anyone cares to shed some light on the subject? Many thanks! :)
 
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Weaselboy

Moderator
Staff member
Jan 23, 2005
30,005
9,664
California
So, as far as I get it, Lion won't automatically enable TRIM which basically means that if I installed an SSD drive and didn't run the commands to enable TRIM, I'd have my drive failing me after a short while
Not so. The absence of TRIM will not cause a drive to fail. All that might happen is the write speed only may slow down, and that is after every single NAND cell on the drive has been written to one time. All newer SSD have some sort of TRIM-like function built into the firmware and will handle this for you anyway.

I know that Crucial provides regular firmware updates to their SSD's. I wonder if any of these Firmware updates makes TRIM start to work on Lion.
Doubtful. The drives already support the TRIM command and it is Apple that has chosen not to enable it for whatever reason.
 
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