Consufe with RMAN 9i

Hi all,

   I use Oracle 9.2.0.4.

   My Oracle environment is DataGuard. My goal is use RMAN backup of standby database to restore and recover primary database. At the primary db server, I mount location is /tmp/backup to standby db server (it's mean: both of standby and primary can see this location).

   Ok, I use bellow script to backup standby database: 

 run {

 backup format '/tmp/backup/stb_%t_%s.dbk' database plus archivelog; 

 crosscheck backupset;

 delete noprompt obsolete device type disk;
}

   I can backup standby db is OK but can not backup controlfile, RMAN give a error : RMAN-06497: WARNING: controlfile is not current, controlfile autobackup skipped