It's obvious but I should have mentioned it nevertheless that I copied the partition table from sdb back to sda, of course. I wonder how the superblock for /dev/md1 could be missing? Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos