I found out that my USB stick is mounted (using foris storage plugin) on /srv without ‘ssd’ or ‘ssd_spread’ option.
Is it possible to add it there?
a little bump if anyone knows, thanks
I can now confirm that:
option options 'ssd_spread'
does not work with TOS 5.1.4:
/dev/sda on /srv type btrfs (rw,noatime,ssd,space_cache,subvolid=257,subvol=/@)`
However, I replaced usb storage by msata SSD, so I won’t need this anymore.