RMAN recover & open database if archive log missing

RMAN recover and open the database if the archive log required for recovery is missing


1) Set _ALLOW_RESETLOGS_CORRUPTION=TRUE in init.ora file.
2) Startup Mount
3) recover database until cancel using backup controlfile;
4) Alter database open resetlogs.
5) reset undo_management to “manual” in init.ora file.
6) startup database
7) Create new undo tablespace
changed undo_management to “AUTO” and undo_tablespace to “NewTablespace”