PRCD error

PRCD-1120

PRCD-1120: The resource for database string could not be found.

Quick fix

Cause
srvctl was asked about a database that is not registered in the Oracle Cluster Registry (OCR) / Oracle Restart. A database created by RMAN DUPLICATE or restored by hand is not registered automatically. It usually appears together with PRCR-1001.
Fix
Register the database with srvctl add database (with its DB_UNIQUE_NAME, Oracle home, spfile and role), and add instances on RAC, then manage it with srvctl.
srvctl add database -db <db_unique_name> -oraclehome $ORACLE_HOME -spfile <spfile> -role PHYSICAL_STANDBY -startoption MOUNT
srvctl config database -db <db_unique_name>
Full walkthrough: PRCD-1120 / PRCR-1001: Your Data Guard Standby Is Running, But It Won'...

The article that fixes it

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