> I have a scenario where I have several NetBSD systems which were just > upgraded to SSDs. I forgot to turn on discard (TRIM) support on the drives > when I first put them in.
I don’t think that’s a big deal. For the record, I have run my SSD without TRIM on NetBSD for a long while now. In fact, your email taught me about the „discard“ option :¬ > 1. Edit /etc/fstab, and add the "discard" option to all FFS file systems OK. > 2. Run "mount -a" which should re-mount the affected file systems with > the newly added option. I'm assuming this work for the trim/discard > opton. Reboot? Otherwise, to enable TRIM without rebooting, try: mount -uo discard / > 3. dd if=/dev/zero bs=4096k of=/my/affected/file/system/DELETEME.000 > I'm assuming short blocks get written as partials. I would skip this step and the following ones. They likely do more harm than good. —Benny.
