___ SOLVED ___ After experimenting with the boot loader changes (without any success in solving the problem), I did some search on the other suspect 'dracut,' replacement for mkinitrd in RHEL/CentOS 6. There were two bug reports on the tool (6.2 and 6.3). I updated dracut to dracut-004-284.el6_3.1.noarch and that fixes the problem. Details on the procedure posted in the CentOS mailing list. Ref. <http://lists.centos.org/pipermail/centos/2012-October/129654.html> Thanks to all who helped. -- Arun Khan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html