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SSD discard not working

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https://bbs.archlinux.org – Can't help it and must dig up this old(er) post and bump it to the top. This info might potentially help others.As the OP, I also noticed that after setting 'discard' as one of the default mount options with 'tune2fs' directly on ext4, 'mount' will not show it as being used:# tune2fs -o discard /dev/sda2 # tune2fs -l /dev/sda2 | grep discard Default mount options: user_xattr acl discard # grep discard /etc/fstab LABEL=archlinux-ssd / ext4 defaults,noatime,discard 0 1 # mount | grep sda2 /dev/sda2 on / type ext4 (rw,noatime,data=ordered)But when that fs opt (HowTos)