You can go back to a 2-port. The #2 port (it's always the last one in the VM module)will turn on and off the messqge lights. If you have a lot of users you are effectively limited to 1 port, at times, available to answer calls. Was there any difference in the original reported problem after you swapped drives?
Tom Daugirdas,
President
STCG, Inc.
stcg.com