Pverha10: Created page with "=ext4= TRIM support is available on ext4. It is activated by adding discard to the list of mount options. So in /etc/fstab it says something like:

 /dev/sdx1        /somewhere               ext4        defaults,discard         1   1

You can also discard the unused blocks manually by using:

 fstrim -v /somewhere

The resulting amount of space trimmed may not be the same as the actual space freed on the disk. It is safe to repeat this, for example in..."

2025-05-17T07:40:33Z

Created page with "=ext4= TRIM support is available on ext4. It is activated by adding discard to the list of mount options. So in /etc/fstab it says something like: <pre> /dev/sdx1 /somewhere ext4 defaults,discard 1 1 </pre> You can also discard the unused blocks manually by using: <pre> fstrim -v /somewhere </pre> The resulting amount of space trimmed may not be the same as the actual space freed on the disk. It is safe to repeat this, for example in..."

New page

=ext4=
TRIM support is available on ext4. It is activated by adding discard to the list of mount options. So in /etc/fstab it says something like:
<pre>
/dev/sdx1 /somewhere ext4 defaults,discard 1 1
</pre>
You can also discard the unused blocks manually by using:
<pre>
fstrim -v /somewhere
</pre>
The resulting amount of space trimmed may not be the same as the actual space freed on the disk. It is safe to repeat this, for example in a cronjob.
<pre>
/somewhere: 3 GiB (3267461120 bytes) trimmed
</pre>

=ntfs on windows=
TRIM support is available on ntfs and refs. You can check if it's active by using the following command:
<pre>
fsutil behavior query disabledeletenotify
</pre>
The response will be like this:
<pre>
NTFS DisableDeleteNotify = 0 (Disabled)
ReFS DisableDeleteNotify = 0 (Disabled)
</pre>
A value of 0 means that it's not disabled, so that TRIM support is active.

You can manually trim a drive from PowerShell with:
<pre>
Optimize-Volume -DriveLetter C -ReTrim -Verbose
</pre>

TRIM Support - Revision history