Mdadm problem NSA325

Hi,

I've got a Zyxel NSA325 running openwrt with 2 drives in raid 1. The NAS seems to work OK in that I can access the files on there but when I type mdadm commands in the terminal to check the raid status I'm not getting any output. I get the same behaviour on 18.06.5 and 19.07.0 rc2. Anybody have any idea what might be going on?

Thanks,

Koen

root@NSA325V1:/etc/config# mdadm --detail /dev/md0
mdadm: cannot open /dev/md0: No such file or directory
root@NSA325V1:/etc/config# cat /proc/mdstat 
Personalities : [raid0] [raid1] [raid10] 
unused devices: <none>
root@NSA325V1:/mnt/md0/Share# ll
drwxrwxrwx    6 root     root          4096 Nov 30 23:26 ./
drwxr-xr-x    6 root     root          4096 Nov 25 20:51 ../
drwxr-xr-x    3 root     root          4096 Nov 30 23:27 Documents/
drwxrwxrwx  102 root     root          4096 Nov 28 22:42 Music/
drwxrwxrwx   57 root     root          4096 Nov 28 21:45 Pictures/
drwxr-sr-x    6 root     root          4096 Dec 16  2018 Videos/