Backups/Restores work, Duplications fail
Master and Media Server:
Data Domain DD880 (VTL)
STK L700e w/ IBM LTO3 drives
When we do a backup or restore to VTL or physical tape, both procedures work fine. When we try to do a duplication, the dupe hangs or may take 3-4 days to dupe what was a 30 minute backup. This occurs with dupes from VTL->VTL, VTL->Physical Tape, Physical ->Physical. Also doesn't matter whether we use Vault, SLP, or dupe from the catalog image manually, the same thing happens.
Any Ideas? We have been working with a Symantec Tech for several months on this, thought I would finally put the question out here.
Thanks in advance for any replies