Yes, I am using LUKS. Sorry for the confusion.
Am Freitag, 18. Januar 2019, 10:38:40 CET schrieb Rui Santos:
I already tried that. But as this is the root device it doesn't seem to have
an affect. Even when regenerating the initrd.
Curiosly, on the one system where it is working, the device doesn't even show
up in /etc/crypttab.
Also, if you're using LVM (which I think it's not the casa, you also need
issue_discards = 1
I have that. However, it seems the discard capability already get's lost at
the crypto layer.
Thanks for confirming I wasn't completely on the wrong track!
Dr. Matthias Bach
„Der einzige Weg, die Grenzen des Möglichen zu finden, ist ein klein wenig
über diese hinaus in das Unmögliche vorzustoßen.“ - Arthur C. Clarke