I will do that as fast as I can. But as I'm actually working with the test system, I will have to save all this data and then clean the hd and reinstall. Maybe I won't find time for that this week. Actually the rules you named exist in /lib/udev/rules.d/63-md-raid-arrays.rules and I think they are here and unchanged since installation as their last modification date is jun, 12. IMHO it's not a problem of these rules but of an incorrect /etc/fstab. But I will reinstall as fast as I find the time. thx xu jth