Tom -

You'll likely have to do the standard analysis to isolate the
problem.  The best first approach is to watch the session from the
server, via repeated Query SEssion, and see what's happening during
it.  (You can get some sense of where waits were occurring in past
sessions by reviewing TSM accounting log data.)  If the problem is
constant on one or two files, perform a cp of the file to /dev/null
and see if that takes far longer than it should, which would point to
file system issues.  Whereas you say that other archives from that
client run at good speed, then it's probably not a network
configuration issue.  If still stumped, run a client trace.

   Richard Sims