Just a quick word of warning- if you’re using Backup Exec 2010 to duplicate disk-based NDMP backups to tape, I’d upgrade to 2010 R3 SP2 (+ 3 associated hotfixes). The long and the short of it is that, chances are those disk backups aren’t being duplicated to tape, regardless of what the job logs say.
This article has further information: Backup Exec 2010 R3 revision 5204 Hotfix 173790 (something to do with DirectCopy). As you can see this is a hotfix for R3 without going to SP2, but I was advised to go straight to SP1 then immediately allow LiveUpdate to install SP2 and hotfixes 180429,176937 and 191248.
This now seems to be working, as I’ve successfully run a restore from tape. Quite why the job histories and logs were giving the thumbs up when it blatantly wasn’t working is beyond me but at least it’s working now.