How to overcome Block corruption using RMAN

Hi All,
How to overcome bolck corruption using RMAN. What is the procedure to do so.
Thanks & Regards
J.Venugopal

Hi all,
I´ve performed the following command on RMAN:
RMAN> BACKUP VALIDATE CHECK LOGICAL DATABASE ARCHIVELOG ALL;After, I query the V$DATABASE_BLOCK_CORRUPTION table, and the below records
was returned:
     FILE#     BLOCK#     BLOCKS CORRUPTION_CHANGE# CORRUPTIO
        67       4670          1         1202832866 LOGICAL
        68     154131        338         1175601952 LOGICAL
        68     155329         60         1174783128 LOGICAL
        68     155409         60         1174783132 LOGICAL
        68     155471         78         1174783135 LOGICAL
        68     155551         78         1174783139 LOGICAL
        68     155631         18         1174783143 LOGICAL
        68     155651         18         1174783144 LOGICAL
        68     155671         18         1174783145 LOGICAL
        68     155691         18         1174783146 LOGICAL
        68     155711         18         1174783147 LOGICAL
        68     155731         18         1174783148 LOGICAL
        68     155751         18         1174783149 LOGICAL
        68     155771         78         1174783150 LOGICAL
        68     155851         78         1174783154 LOGICAL
        68     155931         49         1174783158 LOGICAL
        73     165758          1         1180191676 LOGICALSo, when I try to recover these blocks by using blockrecover command, I got the error:
RMAN> blockrecover corruption list;
Starting blockrecover at 27-SEP-07
using channel ORA_DISK_1
using channel ORA_DISK_2
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of blockrecover command at 09/27/2007 10:22:10
RMAN-06026: some targets not found - aborting restore
RMAN-06023: no backup or copy of datafile 73 found to restore
RMAN-06023: no backup or copy of datafile 68 found to restore
RMAN-06023: no backup or copy of datafile 67 found to restoreWhat can I do in this case?
Thank U very much!
[]´s

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dbv -help
DBVERIFY: Release 10.2.0.1.0 - Production on Sat May 1 07:48:41 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Keyword     Description                    (Default)
FILE        File to Verify                 (NONE)
START       Start Block                    (First Block of File)
END         End Block                      (Last Block of File)
BLOCKSIZE   Logical Block Size             (8192)
LOGFILE     Output Log                     (NONE)
FEEDBACK    Display Progress               (0)
PARFILE     Parameter File                 (NONE)
USERID      Username/Password              (NONE)
SEGMENT_ID Segment ID (tsn.relfile.block) (NONE)
HIGH_SCN    Highest Block SCN To Verify    (NONE)
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PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
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        41    2620930        126         2.0901E+12 NOLOGGING
        41    2621058        126         2.0901E+12 NOLOGGING
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        54     753841         15         2.0901E+12 NOLOGGING
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        53    1901058        126         2.0901E+12 NOLOGGING
        53    1901186        126         2.0901E+12 NOLOGGING
        53    1901314         60         2.0901E+12 NOLOGGING
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        54     754336         32         2.0901E+12 NOLOGGING
        54     754400         32         2.0901E+12 NOLOGGING
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Enter value for afn: 54
old   3: where file_id = &AFN
new   3: where file_id = 54
Enter value for bl: 754016
old   4: and &BL between block_id AND block_id + blocks - 1
new   4: and 754016 between block_id AND block_id + blocks - 1
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PIHIST00
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Fri May 9 10:14:04 2008
Errors in file /u01/app/oracle/admin/test/udump/test_ora_6606.trc:
Fri May 9 10:14:04 2008
Errors in file /u01/app/oracle/admin/test/udump/test_ora_6606.trc:
Fri May 9 10:14:04 2008
Errors in file /u01/app/oracle/admin/test/udump/test_ora_6606.trc
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Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
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http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b14191/rcmconc1012.htm
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