Fedora 18: TRIM and luks

Fri, 01 Mar 2013 23:44:42 +0000

At a first glance enabling TRIM on a luks encrypted volume looks quite easy, and, as a matter of a fact it is.
The shitstorm starts when trying to enable TRIM on the root volume, but, let’s go one step at a time.

First of all, enabling trim on a regular not encrypted volume is pretty easy; just open the file /etc/fstab and add the flag discard.
You may also want to add the flag noatime to prevent the OS from writing additional informations regarding last access date and such, it’s not strictly necessary but it will save the SSD’s cells some useless write operations.
The fstab file should look like this (here only one row is reported):

SSD on nagg.eu

Fedora 18: TRIM and luks