They get logged under /logs now:
webcache3> rdfile /logs/messages Sun Mar 7 00:00:03 EST [asup_main]: System Notification mail sent Sun Mar 7 01:00:01 EST [statd]: 1:00am up 12 days, 16:39 60012695 URL's serviced Sun Mar 7 02:00:01 EST [statd]: 2:00am up 12 days, 17:39 60054150 URL's serviced [...]
disk errors are not logged in the /logs/messages file with 3.2* NetApp cache code and 3.3 NetApp cache code.
Colin Johnston SA PSINET UK