Is TRIM or DISCARD needed for regular HDDs

Monday, 23 November 2020

Hi,

I am confused about whether I should use TRIM or DISCARD on my laptop.

I use LVM on top of LUKS and I do make frequent use of snapshots. Merging
them to my root volume.

I have a regular HDD and not a SSD.

Will enabling TRIM and DISCARD help me?

If so, how do I do that ? I have already tried enabling:

           issue_discards=1

in /etc/lvm/lvm.conf and then dracut -f

But fstrim -v / still fails with :

                 fstrim: /: the discard operation is not supported

So how do I enable it in Fedora32 ?

-- 
Regards,
Sreyan Chakravarty