Just as an update:
-recall that our current testing has removed any Netbackup or robotics from the picture. It's just a Netapp, a SCSI card, and a DLT drive. :)
-I'm indeed certain that we're talking about 100% differential SCSI.
-I thought I found the problem when I realized that the DLT drive had a SCSI ID of 1. So I set it to 0, rebooted the filer, power cycled the DLT, and saw no difference :(
-I have heard from lots of people who aren't having any problems connecting an F760 to a DLT 7k in an STK 9740, so I know it's not some sort of inherent STK-NetApp incompatibility.
But I'm reduced, at this point, to finding any possible difference between the SUN drive (that worked) and the STK drive (that doesn't work) - jumpers, firmware, etc.
Thanks for the assistance so far, folks.
rob
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