Here is the key statement extracted from Symantec’s response…
“I see no way to safely do what you’re describing; if the logs aren’t there due to having been truncated by the log shipping process they can’t be backed up by NBU, and clearly you can’t use NBU to truncate the logs because that will mess up log shipping. If the logs are truncated every 10 minutes you might be able to capture them with NBU if you execute NBU jobs frequently enough, but there’s no way to guarantee it.”
This comes from an internal Symantec NetBackup Technical Product Manager in Technical Field Enablement dept.
So leads us into a technical cul-de-sac.
Any integration / scripting / AIR magic would be at our own risk, as its not an off the shelf solution.
Thanks for the storage replication input. I would like to do that; did similar with EMC SRDF/CE some years ago for another client.
But as you say, its £££ & back to the drawing board.