OS X El Capitan Opens Door to TRIM Support on Third-Party SSDs for Improved Performance

[bladerunner2000]

Long overdue.

Maybe now they can fix the green button problem by making it maximize to full available screen while still showing the dock and file menu.

 

[jefe2000]

Oh, this is simply wonderful. When I requested this feature via Apple's Feedback Form awhile back, I wasn't sure if it'd go anywhere. I'm glad we spoke up and let Apple know that this is an important feature to many of us. Hopefully this'll lead to much simpler OS X update procedures on my 2008 iMac running an internal SSD.

And, thanks to Apple for listening!

 

[fhall1]

Another reason to hold off updating from Mavericks until El Cap is released (unless 10.10.4 actually includes the ability to enable TRIM)

 

[DPUser]

You Make Me So Very Happy

 

[obitow]

Long overdue.

Maybe now they can fix the green button problem by making it maximize to full available screen while still showing the dock and file menu.

In my Mac I can have the old green button behaviour with a double click on the title bar.

 

[magbarn]

If you install the latest firmware (April 2015) the problem gets fixed by regularly moving the data around on the SSD in the background. Upgrading the firmware is quite easy – if you manage to boot your Mac from a CD or USB (in my case I had to replace the DVD drive with another one to get it to boot, since the DVD drive had died and USB booting is not supported on older Macs).

If you do not upgrade the firmware, older files will get very slow read speeds, slower than the HD you have replaced.

The problem with that 'fix' is that the drive is wearing out much faster than it should as it shouldn't have to 'move around' i.e. re-write so often to keep the data 'fresh' so the drive doesn't slow down. I guess since SSD's have come down in price so much in the last year, I just dumped my 840 Evo's on ebay buyers who either don't know or don't care about this defect.

 

[bladerunner2000]

In my Mac I can have the old green button behaviour with a double click on the title bar.

Doesn't fix the problem though.

 

[Mike MA]

Unexpected but very welcome.

 

[Tucom]

Am I reading this wrong, or do you have to disable Rootless to enable TRIM support? Or is this article just very misleading? Disabling Rootless is a def. no go for me, as I'm all about security first. If Rootless has to be disabled to enable TRIM how is it any different than with previous OS's if it requires a third party tool?

I honestly don't see how this is "AWESOME ZOMG GREAT" news if that's the case. Seems like a step backwards or a side-step at best.

 

[Peel]

Awesome! Now how about implementing kasbert's OS-X-SAT-SMART-Driver so that those of us with external usb drives can have S.M.A.R.T. support. It worked great under Mavericks but with the Yosemite's lockdown on unsigned kext files I haven't been able to get it to work, even by setting kext-dev-mode=1

 

[Marx55]

Just about time. Check out this (SanDisk using Toshiba memory):

SanDisk’s beastly new SSD offers 2TB of storage, 850Mbps transfer rate
http://bgr.com/2015/06/02/sandisk-fastest-2tb-ssd-smallest-128gb-flash

SanDisk Extreme 500 portable SSD - 120GB and 240GB
Seq. Read: 415 MB/s - Seq. Write: 340 MB/s
http://www.sandisk.com/products/ssd/sata/extreme-500-portable-ssd

SanDisk Extreme 900 portable SSD - 480GB, 960GB and 1.92TB
Seq. Read: 850 MB/s - Seq. Write: 850 MB/s
USB 3.1
http://www.sandisk.com/products/ssd/sata/extreme-900-portable-ssd

SanDisk Expands Into the External Storage Market with World’s Highest- Performing Portable SSD
New family of offerings feature world’s fastest line-up of Type C-based portable SSDs
COMPUTEX 2015 — TAIPEI, Taiwan – June 1, 2015 – SanDisk Corporation (NASDAQ: SNDK), a global leader in flash storage solutions, today entered the portable SSD market with a family of high-performance drives, including the SanDisk Extreme 900 Portable SSDs, the world’s fastest line of Type C-based portable SSDs; and the SanDisk Extreme 500 Portable SSDs, the company’s new pocket-sized, rugged drives.
These new drives come with both USB Type-C and Type-A cables to provide the ultimate flexibility when working between systems.
SSD lines feature a three-year warranty.
The SanDisk Extreme 500 Portable SSDs will be available worldwide in capacities of 120GB, 240GB and 480GB, at MSRPs of $99.99, $149.99 and $239.99 respectively. The SanDisk Extreme 900 SSDs will be available worldwide in capacities of 480GB, 960GB and 1.92TB at MSRPs of $399.99, $599.99 and $999.99, respectively.
http://www.sandisk.com/about-sandis...-with-world’s-highest-performing-portable-ssd

 

[Weaselboy]

Am I reading this wrong, or do you have to disable Rootless to enable TRIM support? Or is this article just very misleading? Disabling Rootless is a def. no go for me, as I'm all about security first. If Rootless has to be disabled to enable TRIM how is it any different than with previous OS's if it requires a third party tool?

I honestly don't see how this is "AWESOME ZOMG GREAT" news if that's the case. Seems like a step backwards or a side-step at best.

If you look at the tests of this in the other thread, you only temporarily disable rootless to run the trimforce command, then enable rootless again afterward. So you have not compromised the rootless protections by doing this.

 

[Tucom]

If you look at the tests of this in the other thread, you only temporarily disable rootless to run the trimforce command, then enable rootless again afterward. So you have not compromised the rootless protections by doing this.

That's kinda what I was thinking after I posted this, as I all I read was the main article. That makes sense, given that I guess trim force activates at a system level, requiring Rootless to be temporarily disabled?

It'd be killer if it didn't, but I guess with it being re-enabled this is good news.

I personally have been running a Crucial MX100 256GB SSD in my 5,1 Mac Pro for months with zero performance degradation, so I personally don't see what the big deal is. Still cool none the less.

 

[xgman]

Now, if Apple can find a way to do this without requiring rootless to be disabled, that'd be awesome.

Wasn't there also some rumor out of the dev site that Apple may close the disabling of rootless command? That would kill all of this I think.

 

[Cougarcat]

Good news. I've never bothered with Trim Enabler because I've always heard conflicting reports of whether TRIM is necessary on crucial SSDs, but if it's a simple terminal command I may as well do it.

 

[Tucom]

Wasn't there also some rumor out of the dev site that Apple may close the disabling of rootless command? That would kill all of this I think.

Now that you mention that, wouldn't it be more secure to have the disableRootless command gone, as wouldn't that BE the off switch malicious code could use to get past Rootless?

 

[XboxMySocks]

Thanks for the tutorial in this article

 

[Weaselboy]

Wasn't there also some rumor out of the dev site that Apple may close the disabling of rootless command? That would kill all of this I think.

Yup... here in the Apple dev forums. Although it does not make sense they would provide that command and block using it.

 

[phrehdd]

Hopefully I wont offend anyone - Apple has jerked us way too long with this issue and I am not thankful that they got around to something that should have come months and months ago. Apple may do some brilliant things but they also are getting notorious for abandoning some things, getting to others late and if we are to pay an Apple Tax, at least do us the courtesy and take care of the obvious in a timely fashion. Quite amazing how Apple has become the new Microsoft with jerking users around.

 

[MTW]

edit: late to the party

 

[philotas]

First time that I am reading that 10.10 Yosemite has problems with TRIM

Currently I am using 10.9 with a Samsung 830 Pro SSD and I wanted to upgrade to to 10.10 on a bigger Samsung 840 Evo SSD.

Reading this article I probably should wait for 10.11 El Capitan.

I wish I could wait for 10.11 but the most recent Xcode is not supported on 10.9.

The real question is: Do I have to worry about TRIM on an 830 Pro or 840 EVO anyways since I haven't in 10.9?

 

[b0fh666]

Wasn't there also some rumor out of the dev site that Apple may close the disabling of rootless command? That would kill all of this I think.

indded. it would kill the entire OS for me, make me stay in yos until my macs die then change back to linux PCs

 

[HenryDJP]

Long overdue.

Maybe now they can fix the green button problem by making it maximize to full available screen while still showing the dock and file menu.

That's more of a personal preference than something that needs to be "fixed". I happen to prefer the full maximizing of Safari hiding everything else. Menu bar and Dock are still easily accessible.

 

[MikhailT]

For those talking about boot-args going away, this wouldn't remove the option to disable rootless. It appears this will be a menu option via the Recovery partition tools. So, instead of issuing the command via CLI, you'd just have to reboot into the recovery partition and look at the security options in the menu to disable rootless.

 

[theluggage]

Most SSD manufacturers have garbage collection built into their controllers that cleans up during idle time.

Garbage collection works better if you have TRIM enabled as well.
https://www.cindori.org/trim-vs-garbage-collection/

TLDNR: Without TRIM, the drive doesn't 'know' that data has been deleted until the system gets around to trying to re-use that space. Garbage collection will still work without TRIM , but will waste time preserving and consolidating data that has actually been 'deleted'.


Also note that - at least with some types of garbage collection - you must take steps to ensure that it gets idle time to run (especially if its the system drive in a laptop that gets powered down when idle to save juice). See: http://forum.crucial.com/t5/Crucial-SSDs/My-SSD-used-to-be-so-much-faster-What-happened/ta-p/118310