Steve, excellent post!
Glenn (the other one)
Edit /vol/vol0/etc/syslog.conf and modify the line for /dev/console.
If you comment it out, then no messages are written to the console. Or you can specify the minimum severity of messages written to the console. For example, *.warning shows warnings and above, which excludes "info" and "notice" level messages.
You should leave the configuration for /etc/messages alone since netapp autosupport reads that file.
See the man page for syslog.conf for details.
Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support