Nichts fatales, aber unschön: unknown mount option [nls].
MLD> dmesg
...
[ 9.422191] XFS (mmcblk0p1): unknown mount option [nls].
...
MLD>
MLD> mount
rootfs on / type rootfs (rw)
/dev/mmcblk0p2 on / type btrfs (rw,relatime,ssd,noacl,space_cache)
proc on /proc type proc (rw,relatime)
sys on /sys type sysfs (rw,relatime)
tmp on /tmp type tmpfs (rw,relatime)
run on /run type tmpfs (rw,relatime)
dev on /dev type devtmpfs (rw,relatime,size=186452k,nr_inodes=46613,mode=755)
log on /var/log type tmpfs (rw,relatime)
/dev/mmcblk0p2 on /media/sd-mmcblk0p2 type btrfs (rw,relatime,ssd,noacl,space_cache)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620,ptmxmode=000)
/dev/mmcblk0p2 on /var/cache type btrfs (rw,relatime,ssd,noacl,space_cache)
/dev/mmcblk0p2 on /mnt/data type btrfs (rw,relatime,ssd,noacl,space_cache)
/dev/mmcblk0p1 on /boot type vfat (rw,relatime,fmask=0002,dmask=0002,allow_utime=0020,codepage=437,iocharset=ascii,shortname=mixed,errors=remount-ro)
MLD>
MLD> cat /etc/fstab
proc /proc proc defaults 0 0
sys /sys sysfs defaults 0 0
run /run tmpfs defaults 0 0
tmp /tmp tmpfs defaults 0 0
dev /dev devtmpfs defaults 0 0
devpts /dev/pts devpts mode=0620,gid=5 0 0
/dev/dvd /media/dvd auto ro,noauto 0 0
/dev/cdrom /media/cdrom auto ro,noauto 0 0
UUID=820ce390-9683-4b21-a195-c643d28b406b / auto defaults 0 1
UUID=820ce390-9683-4b21-a195-c643d28b406b /var/cache btrfs subvol=@cache 0 0
UUID=820ce390-9683-4b21-a195-c643d28b406b /mnt/data btrfs subvol=@data 0 0
UUID=8FF8-E6F6 /boot auto defaults 0 2
MLD>
MLD> cat /etc/mtab
rootfs / rootfs rw 0 0
/dev/mmcblk0p2 / btrfs rw,relatime,ssd,noacl,space_cache 0 0
proc /proc proc rw,relatime 0 0
sys /sys sysfs rw,relatime 0 0
tmp /tmp tmpfs rw,relatime 0 0
run /run tmpfs rw,relatime 0 0
dev /dev devtmpfs rw,relatime,size=186452k,nr_inodes=46613,mode=755 0 0
log /var/log tmpfs rw,relatime 0 0
/dev/mmcblk0p2 /media/sd-mmcblk0p2 btrfs rw,relatime,ssd,noacl,space_cache 0 0
devpts /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=000 0 0
/dev/mmcblk0p2 /var/cache btrfs rw,relatime,ssd,noacl,space_cache 0 0
/dev/mmcblk0p2 /mnt/data btrfs rw,relatime,ssd,noacl,space_cache 0 0
/dev/mmcblk0p1 /boot vfat rw,relatime,fmask=0002,dmask=0002,allow_utime=0020,codepage=437,iocharset=ascii,shortname=mixed,errors=remount-ro 0 0
MLD>