I got it quite a time now, everything works fine but i like to know what tat means Suject: Cron source /etc/sysconfig/mdadm; [ -n "$MDADM_CHECK_DURATION" -a -x /usr/share/mdadm/mdcheck -a $(date +%d) -le 7 ] && /usr/share/mdadm/mdcheck --duration "$MDADM_CHECK_DURATION" Content: ls: cannot access /dev/md?*: No such file or directory Tank for help Rainer