> Are you by chance using an old version of samba?
>
> run netstat -m
> anything but 0's in the fail column?
> Large values in the last 3 lines?
> I'm not sure what to consider large, It depends on your box and your apps and your usage

In addition to crappy SAMBA code, I've seen SCO 5.0.x boxes wiped out
from viruses on the network - they'll hammer the server and cause the
same problems with exhausted streams resources. To the OP, make sure
you don't have any infected windows machines on the same subnet as the
SCO server.