oracle@r06pc04:~$ rlwrap rman target /

Recovery Manager: Release 11.1.0.6.0 - Production on Thu Jan 29 13:14:37 2009

Copyright (c) 1982, 2007, Oracle.  All rights reserved.

connected to target database: ORCL (DBID=1204950473)

RMAN> backup database;

SQL> select FILE_ID, BLOCK_ID, blocks from dba_extents where SEGMENT_NAME=upper('large_table');

in welchem file liegen die Blöcke

SQL> select name from V$DATAFILE where file#=4;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/orcl/users01.dbf

Block demolieren

oracle@r06pc04:~$ dd if=/dev/zero of=/u01/app/oracle/oradata/orcl/users01.dbf seek=38681 bs=8k count=1 conv=notrunc

cache flushen

SQL> alter system flush buffer_cache;

SQL> select count(*) from bla.large_table;
select count(*) from bla.large_table
                         *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 4, block # 38681)
ORA-01110: data file 4: '/u01/app/oracle/oradata/orcl/users01.dbf'

Lösung
rman> backup validate tablespace users;

rman> list failures;

rman> advise failure;

rman> repair failure;

RMAN> recover datafile 4 block 38681;

RMAN> backup as copy format '/home/oracle/control.ctl' current controlfile;

RMAN> backup database ;

Databank zerstören, dann

oracle@r06pc04:~$ sql+

SQL*Plus: Release 11.1.0.6.0 - Production on Thu Jan 29 15:26:46 2009

Copyright (c) 1982, 2007, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

ORA-00205: error in identifying control file, check alert log for more info

oracle@r06pc04:~$ rlwrap rman target /

Recovery Manager: Release 11.1.0.6.0 - Production on Thu Jan 29 15:27:45 2009

Copyright (c) 1982, 2007, Oracle.  All rights reserved.

connected to target database: ORCL (not mounted)

RMAN> list failure
st of Database Failures
=========================

Failure ID Priority Status    Time Detected Summary
---------- -------- --------- ------------- -------
291        CRITICAL OPEN      29-JAN-09     Control file /u01/app/oracle/oradata/orcl/control01.ctl is missing
288        CRITICAL OPEN      29-JAN-09     Control file /u01/app/oracle/oradata/orcl/control02.ctl is missing
285        CRITICAL OPEN      29-JAN-09     Control file /u01/app/oracle/oradata/orcl/control03.ctl is missing
142        HIGH     OPEN      29-JAN-09     Datafile 4: '/u01/app/oracle/oradata/orcl/users01.dbf' contains one or more corrupt blocks

wenn kein autobackup aktiviert ist

RMAN> restore controlfile from '/home/oracle/control.ctl';