List backup executed on primary 11gR2

Question

I execute a command LIST BACKUP on the RMAN of the primary db of the Dataguard 11gR2 when connected via recovery catalog and it shows now backup at all.
But run that same cmd on standby, it shows all the backup. The backup is run on standby only.
Can anyone explain ?

Answer 1

See "Using Files On a Standby Database"
under http://download.oracle.com/docs/cd/E11882_01/server.112/e17022/rman.htm#BAJCEFEG
to actually copy from the standby itself.
Per "11.7 Performing Backup Maintenance in a Data Guard Environment" at
http://download.oracle.com/docs/cd/E11882_01/server.112/e17022/rman.htm#BAJHDFIH
"+File sharing attributes state that files on disk are accessible only at the database with which they are associated, whereas all files on tape are assumed to be accessible by all databases. RMAN commands such as BACKUP and RESTORE, as well as other maintenance commands, work according to this assumption. For example, during a roll-forward operation of an image copy at a database, only image copies associated with the database are rolled forward. Likewise, all incremental backups on disk and all incremental backups on tape will be used to roll forward the image copies. Similarly, during recovery operations, only disk backups associated with the database and files on tape will be considered as sources for backups."+
However, I haven't verified or tested this.
Hemant K Chitale