BLOG

Trying to Recover Database and Open it with Resetlogs will lead to this error :-

ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: ‘/u01/app/oracle/oradata/NPDB/system01.dbf’

This Error is only apart of the problem, To solve it :-

Recover database using file name (Redolog) to get the current filename :-

SQL > Startup mount ;

 SQL > select member from v$logfile lf , v$log l where l.status=’CURRENT’ and lf.group#=l.group#;

 MEMBER
——————————————-
/u01/app/oracle/oradata/NPDB/redo03.log

SQL > Recover database using backup controlfile until cancel ; 

 Specify log: {=suggested | filename | AUTO | CANCEL}

 /u01/app/oracle/oradata/NPDB/redo03.log ( From the Above Query ).

Log applied.
Media recovery complete.

 Trying to open database :-

SQL > Alter database open Resetlogs ;

Failed !!!! with Another Datafile which is UNDO.

 ORA-01110: data file 4:’/u01/app/oracle/oradata/NPDB/UNDOTBS01.DBF’

SQL  > Create Pfile from Spfile ;

Modify the pfile and add the hidden parameter :-

_allow_resetlogs_corruption=True  

But this Not Solved the problem either.

Again Edit Pfile But this Time :-

undo_management=manual
undo_tablespace=UNDOTBS1 

SQL> select name from v$datafile; 

NAME
——————————————–
/u01/app/oracle/oradata/NPDB/SYSTEM01.DBF
/u01/app/oracle/oradata/NPDB/UNDOTBS01.DBF
/u01/app/oracle/oradata/NPDB/SYSAUX01.DBF
/u01/app/oracle/oradata/NPDB/USERS01.DBF
……………………

SQL > alter database datafile ‘/u01/app/oracle/oradata/NPDB/UNDOTBS01.DBF’ offline drop;

ERROR at line 1:
ORA-01548: active rollback segment ‘_SYSSMU11$’ found, terminate dropping tablespace

Check Segment that Needs Recovery :-

SQL>select segment_name,status,tablespace_name from dba_rollback_segs where status=’NEEDS RECOVERY’; 

SEGMENT_NAME STATUS TABLESPACE_NAME
—————————— —————- —————–
_SYSSMU11$ NEEDS RECOVERY UNDOTBS1
_SYSSMU12$ NEEDS RECOVERY UNDOTBS1
_SYSSMU13$ NEEDS RECOVERY UNDOTBS1 

Add the following line to pfile:

_corrupted_rollback_segments = (‘_SYSSMU11$’,’_SYSSMU12$’,’_SYSSMU13$’);

SQL > Startup mount pfile=’/u01/osama.ini’;
SQL > drop rollback segment “_SYSSMU11$” –> Drop all the above Segments ;

Drop the Undo And Recreate it again.

SQL > Startup ;

SQL> create undo tablespace UNDOTBS2 

datafile ‘/u01/app/oracle/oradata/NPDB/UNDOTBS02.DBF’ size 1G;

Remove All Hidden Parameter and restore UNDO_Managment Parameter to AUTO and UNDO_TABLESPACE=UNDOTBS2 then :-

SQL> create spfile from pfile; 

first Advice  Enable RMAN Please

 Thank you
Osama Mustafa

Reference :-
1- Doc ID 94114.1
2- Doc ID 1295294.1
3- Doc ID 28226.1