I'm new to this list, so excuse my ignorance in asking this question which may 
have already been kicked around.  We are having performance problems doing 
backups from several AIX boxes to an OS/390 mainframe.  We've looked at the 
network and tons of other things.  To make a long question short, we've 
determined that the problem is that an AIX box will only do 5 GByte per second 
ESCON channel connected - - we believe this is the weak link in the chain, so 
to speak, causing our "ADSM backups take too long" & "ADSM backups not using 
all the available bandwidth" problems.  However, we are getting conflicting and 
widely varying info on this 5 GByte/second number.  Is 5 GByte/second really 
the max an AIX box can do ESCON channel connected to whatever? Can anyone point 
me to an ADSM tuning document or whatever which addresses issues like this?