Last stock firmware version (V5.21(AASZ.5)C0) for NAS520 wanted

and i after spend some time, for my need (only samba and raid 1) i uninstalled omv. it interferes too much in system files and add second layer of abstraction. i installed cockpit and 2 plugins for shares, raid and network. and everything works fast :D. i update rootfs with these changes.

update 1 : i uploaded optimized rootfs, only for zyxel nas 520. have fun. https://github.com/baxino/zyxel_nas520_debian