On Fedora 21, looks like there's a new systemd unit "fstrim.timer" which is disabled by default. Easily enabled with 'systemctl enable fstrim.timer' and will issue trim for all mounted trim supporting volumes once per week. [root@f21s ~]# systemctl status fstrim.timer ● fstrim.timer - Discard unused blocks once a week Loaded: loaded (/usr/lib/systemd/system/fstrim.timer; disabled) Active: inactive (dead) Docs: man:fstrim [root@f21s ~]# cat /usr/lib/systemd/system/fstrim.timer [Unit] Description=Discard unused blocks once a week Documentation=man:fstrim [Timer] OnCalendar=weekly AccuracySec=1h Persistent=true [Install] WantedBy=multi-user.target [root@f21s ~]# cat /usr/lib/systemd/system/fstrim.service [Unit] Description=Discard unused blocks [Service] Type=oneshot ExecStart=/usr/sbin/fstrim -a Chris Murphy -- test mailing list test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe: https://admin.fedoraproject.org/mailman/listinfo/test