Do you have any media servers that are down or were incorrectly decommissioned. I've seen that behavior at my site. Once we cleaned them up, the Device Wizard started working.
"The cluster in question is still running backups, but there are a lot of unprocessed changes to the tape drives and libraries I want to clean up- but I can't get the Device WIzard to work- in fact none of the device management components in the GUI are working-they just spin- for over 3 hours before the Java GUI just shuts down. "
After a cluster failover/failback, the Windows admin console now works with all device management pieces. Java GUI is still broken, but I at least have a workaround to clean up my devices.
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