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enabling trim after update

S

Silverado83

macrumors newbie
Original poster
I have a 2012 cMBP with samsung 830 ssd. I enabled trim through the terminal and all was working fine. Then earlier i installed a software update from apple to 10.8.2. Now i am not able to enable trim through the terminal. I followed all of the steps listed here: http://digitaldj.net/2011/07/21/trim-enabler-for-lion/

This is the method I used the first time I enabled trim and it worked fine but now it seems to not be working. Is anyone else having this issue? Any help with this situation would be greatly appreciated.
 
davidlv said:
Check out the ChameleonSSDOptimizer at
http://chameleon.alessandroboschini.it/index.php
This app does all the terminal commands for you and more.
I tried the Trimenabler app too, but had to repair permissions after a reboot.
The ChameleonSSDOptimizer app didn't, so I suspect it is written well.
Click to expand...

Thanks for the help but im not wanting to use an app. i want to stick to manually entering it in the terminal.

Has anyone entered the code in the terminal and had success after the software update from apple?
 
Silverado83 said:
Thanks for the help but im not wanting to use an app. i want to stick to manually entering it in the terminal.

Has anyone entered the code in the terminal and had success after the software update from apple?
Click to expand...

Don't have it handy , but the terminal update for 10.8.2 changed slightly ..it's out there someplace .. Apple modified the kext slightly , so the commands have been modified slightly .. There's an earlier thread in here someplace as well describing ..the new commands work as well as the old ones ..I used them on my previous MacBook Pro ..
 
ok I have tried every known command to enable trim and it is not working. can anyone explain why when i use the terminal it is not working? Again i don't want to use a third party app. i want to be able to enable trim via terminal every time i have a software update.
 
Silverado83 said:
ok I have tried every known command to enable trim and it is not working. can anyone explain why when i use the terminal it is not working? Again i don't want to use a third party app. i want to be able to enable trim via terminal every time i have a software update.
Click to expand...
I got this from another thread, forgot where and who contributed it so I cannot give credit where it is due... or take any responsibility for it. Use at your own risk.
1. Backup the file we’re patching
sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original
2. Patch the file to enable TRIM support
FOR ML 10.8.1 AND LION 10.7.5 OR NEWER

sudo perl -pi -e 's|(\x52\x6F\x74\x61\x74\x69\x6F\x6E\x61\x6C\x00{1,20})[^\x00]{9}(\x00{1,20}\x4D)|$1\x00\x00\x00\x00\x00\x00\x00\x00\x00$2|sg' /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage

3. Force a refresh of the system’s kernel extension cache
sudo touch /System/Library/Extensions/

4.flush the kext caches:
sudo kextcache -system-prelinked-kernel
sudo kextcache -system-caches
5 Reboot
a) If in the future you want to disable TRIM support
FOR ML 10.8.1 AND LION 10.7.5 OR NEWER

sudo perl -pi -e 's|(\x52\x6F\x74\x61\x74\x69\x6F\x6E\x61\x6C\x00).{9}(\x00\x4D)|$1\x41\x50\x50\x4C\x45\x20\x53\x53\x44$2|sg' /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage

b) If something goes horribly wrong, restore the backup
sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage

You might have to run repair permissions too.
Did that work? 😱 or 😎 ?
 
davidlv said:
I got this from another thread, forgot where and who contributed it so I cannot give credit where it is due... or take any responsibility for it. Use at your own risk.
1. Backup the file we’re patching
sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original
2. Patch the file to enable TRIM support
FOR ML 10.8.1 AND LION 10.7.5 OR NEWER

sudo perl -pi -e 's|(\x52\x6F\x74\x61\x74\x69\x6F\x6E\x61\x6C\x00{1,20})[^\x00]{9}(\x00{1,20}\x4D)|$1\x00\x00\x00\x00\x00\x00\x00\x00\x00$2|sg' /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage

3. Force a refresh of the system’s kernel extension cache
sudo touch /System/Library/Extensions/

4.flush the kext caches:
sudo kextcache -system-prelinked-kernel
sudo kextcache -system-caches
5 Reboot
a) If in the future you want to disable TRIM support
FOR ML 10.8.1 AND LION 10.7.5 OR NEWER

sudo perl -pi -e 's|(\x52\x6F\x74\x61\x74\x69\x6F\x6E\x61\x6C\x00).{9}(\x00\x4D)|$1\x41\x50\x50\x4C\x45\x20\x53\x53\x44$2|sg' /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage

b) If something goes horribly wrong, restore the backup
sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage

You might have to run repair permissions too.
Did that work? 😱 or 😎 ?
Click to expand...

I did all of the above and still nothing...The only thing i hadn't tried was repair permissions but it still did not work
 
Silverado83 said:
I did all of the above and still nothing...The only thing i hadn't tried was repair permissions but it still did not work
Click to expand...
Just a thought, but why not try running the OSX 10.8.2 combo updater and then the supplemental update to make sure the target kext files are correctly installed, then run the terminal commands again.
As a diagnostic measure, you could run the ChameleonSSDOptimizer app to see if that will work. This utility has several good options available too, like enabling noatime, and, without those extras, it really just runs the terminal commands, so it is not doing anything strange.
It seems as if there may be something that is not right with your install of ML.
Have you run disk warrior on the target disk, or Disk Utility Repair Disk if you don't have DW?
I have had no trouble at all using ChameleonSSDOptimizer app on my newly installed Intel 335 240GB SSD. Your experience/case is a little confusing, makes you wonder what could be going wrong....😕
 
davidlv said:
Just a thought, but why not try running the OSX 10.8.2 combo updater and then the supplemental update to make sure the target kext files are correctly installed, then run the terminal commands again.
As a diagnostic measure, you could run the ChameleonSSDOptimizer app to see if that will work. This utility has several good options available too, like enabling noatime, and, without those extras, it really just runs the terminal commands, so it is not doing anything strange.
It seems as if there may be something that is not right with your install of ML.
Have you run disk warrior on the target disk, or Disk Utility Repair Disk if you don't have DW?
I have had no trouble at all using ChameleonSSDOptimizer app on my newly installed Intel 335 240GB SSD. Your experience/case is a little confusing, makes you wonder what could be going wrong....😕
Click to expand...

when i installed the ML updated i believe i installed the combo updater and then the supplemental update. when i check for more updates there are not any available.
 
Silverado83 said:
when i installed the ML updated i believe i installed the combo updater and then the supplemental update. when i check for more updates there are not any available.
Click to expand...
Software Update will of course say no updates are available, but you can download that at
http://support.apple.com/kb/DL1581 , and then run Software Update to get the supplemental update, in order to make sure the target file is OK.
However, I suspect the problem is not the target file. 😕
Just run the app suggested above and see if trim gets enabled, I don't think it will mess up your system.
 
Should the trim be enabled after formatting but before running a cloning utility like superduper that would be cloning my old mechanical hd to the ssd?
 
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