I'm trying to track down a problem that's been getting worse as my Dell
2850 main home server has been getting more loaded down with work. From
time to time, the machine will lock up temporarily: it doesn't respond
to ICMP ECHO, and it doesn't echo characters typed on the console. It
will sit like that for three or four minutes, and then continue
running. Nothing is logged, other than messages that are consequences
of the hang.