Slow shutdown on FreeBSD

- Code:
service serviio stop
Dec 20 07:53:36 beast root: /etc/rc.shutdown: DEBUG: run_rc_script /usr/local/etc/rc.d/serviio faststop
Dec 20 07:53:36 beast root: /etc/rc.shutdown: DEBUG: checkyesno: pc5dczc_enable is set to YES.
Dec 20 07:53:36 beast root: /etc/rc.shutdown: DEBUG: run_rc_command: doit: /usr/local/sbin/serviiod -stop
Dec 20 07:54:52 beast root: /etc/rc.shutdown: DEBUG: run_rc_script /usr/local/etc/rc.d/smartd faststop
in this case it took 1min 16sec to stop, there are not clients attached and no load.
This happens during system shutdown and it can take more than 90seconds leading to "rc.shutdown: 90 second watchdog timeout expired. Shutdown terminated." which is very bad.
Any ideas?