I have hd this issue in the past on a few server but the issue comes and
goes speraticlly. Server is running fine for day/months and then all of a
sudden it starts to slow down. File access becomes slugish and then finilly
it just stops. I can ping the server, CPU is very low, 1% - 10%, and plenty
of Cache buffers. Server console is also very slow. Ctrl + Esc takes
forever but does work. To fix this all I have to do is unplug the nic and
re-plug it back in and away we go.

Server is 6.5 sp3 and now sp4a, HP DL380 4GB RAM with 1GB Ethernet.

I am at a loss, I have tried new drives and everything else I could think
of. Any ideas?