Recently, we attempted for the first time to do parallel backups to three 3590 
tape drives in a 3494 robotic library across an SP switch and failed with 
numerous "TCP/IP connection" failures. Similar parallel backups across ethernet 
worked fine, but were much slower than a switch. We also had success using just 
two drives and the SP switch. Has anyone else had this experience? Is this a 
matter of tuning (our 'no' settings are considered optimal according to the 
latest information on SP tuning)? Or, are we expecting too much?

Jim Bootz
bootz AT adc DOT com


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