Hmm if you are doing what it appears you are and in effect flat file copying disk based backup sets, by extracting a mirrored disk to a vault which is kept offline whilst more backup operations take place, then you are going to have all sorts of problems with inventory and catalog information being mismatched (as well as possible drive letter issues if GRT is involved) If this is the case there may be no easy way to restore as lots of manual steps wil be needed to get things consistent.
See this document to understand why
http://www.symantec.com/business/support/index?page=content&id=TECH176061
It might be easier if your catalogs and BEDB.BAK are also stored on the disk that you swap out as then you would at least have a potentially matched set of the 3 key components of Backup Exec.
In your scenario I think I would install a clean version of Backup Exec somewhere and then attach that disk and run inventory and catalog jobs so that new references are created with no way to mismatch with historical data still on the backup server. However in the long term you might want to reconsider your backup solution (topology and process design)