This can be caused by a defect in the 3003 version of /usr/etc/lsnfsexp. It contains an rm -f line with an extra /dev/null on the end, which if executed removes /dev/null. To fix the symptom: rm -f /dev/null mknod c 2 2 /dev/null as root of course. You can also edit lsnfsexp so it won't happen again. -- Marc Auslander <marc at ibm.com>