Standby Database: arch1_.dbf in $ORACLE_HOME/dbs/ folder – Make DBA Life Easy
There are a lof of arch1_.dbf files in $ORACLE_HOME/dbs/ folder, after standby database recovery area is full. We can just delete them , or leave standby database to clean up after standby database is in sync with primary database. If manually delete them, crosscheck then accordingly: RMAN > crosscheck archivelog all;