Backup Exec Deduplication is pure garbage! I just upgraded from 2012 from 2010 R3 it's not any better. Speeds are horrible. B2D folder on the same drive array gets almost double the speeds of the dedup folder.
Also I keep getting corrupt OST files in my deduplication folder which caused the jobs to stay queued and Symantec tech support has been almost useless. They tell me there is some kind of communication error to the storage device, but its direct attached storage that works just fine with B2D!! Then they tell me to run an inventory to fix it, but inventory takes 22 hours to complete! How am I supposed to back up in the mean time?
I'm probably going to dump the deduplication all together and just buy more disks and just use regular B2D.