1. First make sure that you have your SATA mode set to "AHCI" in your motherboard's BIOS this is a necessary step for Trim support.
2. Next you must edit your fstab file to include "noatime" & "discard" mounting options for your file system we do this be executing the following:
sudo gedit /etc/fstab
Enter the following options:
noatime,discard,
You do not need to do anything to your "/boot" partition just the root file system "/" or any other partition layout you have such as "/home" it should look something like this when you're finished....
After entering the above text Save & Close the file.
3. Next we should change your I/O scheduler. Assuming you haven't compiled your own custom kernel you're probably using the "CFQ" I/O scheduler. For optimal performance we want to use either "Deadline" or "Noop". To check which scheduler you're using enter the following into Terminal:
cat /sys/block/sda/queue/scheduler
The output should look something like this:
noop [deadline]
As indicate by the brackets I'm running the Deadline I/O scheduler. To change your I/O Scheduler you can either compile your own custom kernel if you're unsure how to do that I have multiple videos covering the topic or you can do it in userspace by editing your /etc/rc.local file.
In Terminal enter the following:
sudo gedit /etc/rc.local
Next you will add the following to this file:
echo deadline > /sys/block/sda/queue/scheduler
It should look like this when you're finished...
After entering the above text Save & Close the file.
4. For changes to take effect reboot your computer and enjoy!
thanks,
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