On Fri, Aug 13, 2021 at 3:50 AM Sebastian Döring [off-list ref] wrote:

quoted

It is BTRFS single profile on LVM on LUKS. Mount options are:

...

quoted

I thought that a Samsung 980 Pro can easily handle "discard=async" so I

used it.

LUKS doesn't do discard unless you explicitly enable and force it. Have you?

`cryptsetup open` doesn't allow discards by default, but some distro
installers do enable it by default. The most likely place to find out
is looking at /etc/crypttab




-- 
Chris Murphy