Hi,
here is an other way to stop systemd-fsck@sirvice to check "/" at every boot,
take a look to the /etc/fstab
and change
UUID=foo-bar-n / ext4 defaults,relatime,errors=remount-ro 0 1
to
UUID=foo-bar-n / ext4 defaults,relatime,errors=remount-ro 0 0
cange the sixed row, where / (root) is, from 1 to 0 (zero)
and run
tune2fs -c 30 -i 30 /dev/sdxN
/dev/sdxN is the device with the root filesystem "/" like /dev/sda1 or /dev/sdb3 ...
You should find it out with: "df -hT".
greetz hendrikL