How to enable SSD TRIM support on Fedora 17?

Question

I used to install Linux on HDD. It's easy. But now I have a SSD, and I want to install Fedora 17 on it.

What should I do to make Fedora 17 issue TRIM commands to the SSD?

How big is your SSD? It should work fine. Did you try installing it already?
So what problem are you having? Do you need help partitioning? Help with the bootloader? What exactly are you asking?
The Fedora Guide (for 14) has a chapter on deployment on SSD, is it helpful?
I don't see any difference on installation, what you expecting, tuning ?

Michael Hampton · Accepted Answer · 2012-08-01 21:04:03Z

This is pretty easy, now that TRIM passes through LVM to the underlying device(s).

When you install, make sure your filesystems are all set to ext4. TRIM is not supported on ext3.
After you install, login as root and edit /etc/fstab. In the fourth column (that usually reads defaults) add the keyword discard. Do this for both the / and /boot partitions, and any other partitions you created on the SSD.

An example:
```
/dev/mapper/vg_mymachine-lv_root /                       ext4    discard         1 1
UUID=94b6d32d-ec21-4028-9a89-b1a19849c4ad /boot                   ext4    discard         1 2
```
(If defaults is the only keyword there, it can be replaced with discard. If other keywords are there, append it with a comma, e.g. whatever,discard.)

Nothing needs to be done for swap; all swap partitions automatically support TRIM.
Restart the computer.

1 Answer