On Tue, 13 Jan 1998, Michael R Vogt wrote:
> I have had 2 instances in the past 2 weeks where ALL the available client
> sessions simply hang. Repeated "query session" commands show all 20 sessions
> in the "Run" state, but no progress in terms of "Bytes Sent" or "Bytes
> Recvd". In both cases, after 2+ hours of no activity, I have had to reboot
> the server to clear the problem.

I've seen this happen if there is a request outstanding.  Try QUERY
REQUEST to see if there are any tape mounts or other actions pending.