RMAN Block RECOVERY
perform Block Media Recovery using RMAN
ORA-01578: ORACLE data block corrupted
RMAN RECOVER BLOCK
SQL> select FILE_NAME from dba_data_files ;
FILE_NAME
--------------------------------------------------------------------------------
/opt/app/oracle/oradata/orcl/users01.dbf
/opt/app/oracle/oradata/orcl/undotbs01.dbf
/opt/app/oracle/oradata/orcl/sysaux01.dbf
/opt/app/oracle/oradata/orcl/system01.dbf
/opt/app/oracle/oradata/orcl/example01.dbf
SQL> create tablespace anujtest datafile '/opt/app/oracle/oradata/orcl/anujtest.dbf' size 10m
autoextend on next 5m extent management local segment space management auto ;
Tablespace created.
apt-lnxtst-01:ORCL\sys> create user anujtest identified by anujtest default tablespace anujtest quota unlimited on anujtest ;
User created.
grant connect , resource to anujtest ;
apt-lnxtst-01:ORCL\sys> conn anujtest/anujtest
Connected.
orcl\anujtest> connect / as sysdba
Connected.
apt-lnxtst-01:ORCL\sys>conn anujtest/anujtest
Connected.
orcl\anujtest> create table test as select * from all_objects ;
Table created.
SQL> connect / as sysdba
Connected.
SQL> col FILE_NAME format a50
SQL> select FILE_NAME,FILE_ID from dba_data_files;
FILE_NAME FILE_ID
-------------------------------------------------- ----------
/opt/app/oracle/oradata/orcl/users01.dbf 4
/opt/app/oracle/oradata/orcl/undotbs01.dbf 3
/opt/app/oracle/oradata/orcl/sysaux01.dbf 2
/opt/app/oracle/oradata/orcl/system01.dbf 1
/opt/app/oracle/oradata/orcl/example01.dbf 5
/opt/app/oracle/oradata/orcl/anujtest.dbf 6 <<<<<<<<<<<<-------
6 rows selected.
RMAN> connect target /
connected to target database: ORCL (DBID=1267852645)
RMAN> backup datafile 6 tag=good;
Starting backup at 29-APR-11
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=53 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00006 name=/opt/app/oracle/oradata/orcl/anujtest.dbf
channel ORA_DISK_1: starting piece 1 at 29-APR-11
channel ORA_DISK_1: finished piece 1 at 29-APR-11
piece handle=/opt/app/oracle/flash_recovery_area/ORCL/backupset/2011_04_29/o1_mf_nnndf_GOOD_6vnsol06_.bkp tag=GOOD comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03
Finished backup at 29-APR-11
RMAN> list backup;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
1 Full 7.48M DISK 00:00:01 29-APR-11
BP Key: 1 Status: AVAILABLE Compressed: NO Tag: GOOD
Piece Name: /opt/app/oracle/flash_recovery_area/ORCL/backupset/2011_04_29/o1_mf_nnndf_GOOD_6vnsol06_.bkp
List of Datafiles in backup set 1
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
6 Full 7522958 29-APR-11 /opt/app/oracle/oradata/orcl/anujtest.dbf
RMAN>Ctrl+d or exit
Recovery Manager complete.
SQL> col SEGMENT_NAME format a20
SQL> r
1 select segment_name , header_file , header_block from dba_segments
2 where segment_name = 'TEST'
3* and owner = 'ANUJTEST'
SEGMENT_NAME HEADER_FILE HEADER_BLOCK
-------------------- ----------- ------------
TEST 6 130
to get file name
col name format a70
select a.name from v$datafile a , dba_segments b
where a.file#=b.header_file and b.segment_name='TEST'
NAME
----------------------------------------------------------------------
/opt/app/oracle/oradata/orcl/anujtest.dbf
The header of the table is in block 130, so if the block 131 or so are corrupted we will get an error when we try to select data from the table.
Lets corrupt block 12 using the "dd" command in Linux.
oracle@apt-amd-02:/opt/app/oracle/oradata/orcl> dd of=anujtest.dbf bs=8192 conv=notrunc seek=130 << EOF
anuj Corrupted.
EOF
0+1 records in
0+1 records out
16 bytes (16 B) copied, 0.000109246 s, 146 kB/s
SQL> select count(*) from anujtest.test ; ----- because whole table in cache
COUNT(*)
----------
55632
SQL> alter system flush buffer_cache;
System altered.
SQL> select count(*) from anujtest.test ;
select count(*) from anujtest.test
*
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 6, block # 130)
ORA-01110: data file 6: '/opt/app/oracle/oradata/orcl/anujtest.dbf'
oracle@apt-amd-02:/opt/app/oracle/oradata/orcl> rman
Recovery Manager: Release 11.2.0.1.0 - Production on Fri Apr 29 07:45:30 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
RMAN> connect target /
connected to target database: ORCL (DBID=1267852645)
RMAN> BLOCKRECOVER DATAFILE 6 BLOCK 130;
Starting recover at 29-APR-11
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=50 device type=DISK
channel ORA_DISK_1: restoring block(s)
channel ORA_DISK_1: specifying block(s) to restore from backup set
restoring blocks of datafile 00006
channel ORA_DISK_1: reading from backup piece /opt/app/oracle/flash_recovery_area/ORCL/backupset/2011_04_29/o1_mf_nnndf_GOOD_6vnsol06_.bkp
channel ORA_DISK_1: piece handle=/opt/app/oracle/flash_recovery_area/ORCL/backupset/2011_04_29/o1_mf_nnndf_GOOD_6vnsol06_.bkp tag=GOOD
channel ORA_DISK_1: restored block(s) from backup piece 1
channel ORA_DISK_1: block restore complete, elapsed time: 00:00:01
starting media recovery
media recovery complete, elapsed time: 00:00:08
Finished recover at 29-APR-11
RMAN>
now block recovered
SQL> select count(*) from anujtest.test ;
COUNT(*)
----------
55632
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Friday, 29 April 2011
ORA-19809: limit exceeded for recovery files
if following error occurred on Oracle database or database hanged due to this error Errors in file /opt/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_arc3_1202.trc: ORA-19809: limit exceeded for recovery files ORA-19804: cannot reclaim 44131328 bytes disk space from 4070572032 limit ARC3: Error 19809 Creating archive log file to '/opt/app/oracle/flash_recovery_area/ORCL/archivelog/2011_04_29/o1_mf_1_330_%u_.arc' check space is fill !!!!!!!!! set lines 100 col name format a60 select name , floor(space_limit / 1024 / 1024) "Size MB" , ceil(space_used / 1024 / 1024) "Used MB" from v$recovery_file_dest order by name / oracle@apt-amd-02:~> id uid=1001(oracle) gid=1000(oinstall) groups=1000(oinstall) oracle@apt-amd-02:~> rman Recovery Manager: Release 11.2.0.1.0 - Production on Fri Apr 29 06:56:30 2011 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. RMAN> connect target / connected to target database: ORCL (DBID=1267852645) RMAN> delete force archivelog until time 'sysdate -1'; ---- delete some archive log file using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=50 device type=DISK List of Archived Log Copies for database with db_unique_name ORCL ===================================================================== Key Thrd Seq S Low Time ------- ---- ------- - --------- 91 1 330 A 13-APR-11 Name: /opt/app/oracle/flash_recovery_area/ORCL/archivelog/2011_04_29/o1_mf_1_330_6vnqzs5c_.arc 92 1 331 A 13-APR-11 Name: /opt/app/oracle/flash_recovery_area/ORCL/archivelog/2011_04_29/o1_mf_1_331_6vnr0q87_.arc 93 1 332 A 13-APR-11 Name: /opt/app/oracle/flash_recovery_area/ORCL/archivelog/2011_04_29/o1_mf_1_332_6vnr0x7c_.arc Do you really want to delete the above objects (enter YES or NO)? yes deleted archived log archived log file name=/opt/app/oracle/flash_recovery_area/ORCL/archivelog/2011_04_29/o1_mf_1_330_6vnqzs5c_.arc RECID=91 STAMP=749717522 deleted archived log archived log file name=/opt/app/oracle/flash_recovery_area/ORCL/archivelog/2011_04_29/o1_mf_1_331_6vnr0q87_.arc RECID=92 STAMP=749717587 deleted archived log archived log file name=/opt/app/oracle/flash_recovery_area/ORCL/archivelog/2011_04_29/o1_mf_1_332_6vnr0x7c_.arc RECID=93 STAMP=749717596 Deleted 3 objects check all the file deleted .... RMAN> delete force archivelog until time 'sysdate -1'; released channel: ORA_DISK_1 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=50 device type=DISK specification does not match any archived log in the repository ======================================================================================================================================== error ************************************************************************ 2025-01-09T03:30:43.218396-05:00 Errors in file /u01/app/oracle/diag/rdbms/ugaryd/ugaryd1/trace/ugaryd1_tt00_8810.trc: ORA-19809: limit exceeded for recovery files ORA-19804: cannot reclaim 105906176 bytes disk space from 1073741824 bytes limit 2025-01-09T03:31:43.253212-05:00 Errors in file /u01/app/oracle/diag/rdbms/ugaryd/ugaryd1/trace/ugaryd1_tt00_8810.trc: ORA-19815: WARNING: db_recovery_file_dest_size of 1073741824 bytes is 100.00% used, and has 0 remaining bytes available. 2025-01-09T03:31:43.253469-05:00 ************************************************************************ You have following choices to free up space from recovery area: 1. Consider changing RMAN RETENTION POLICY. If you are using Data Guard, then consider changing RMAN ARCHIVELOG DELETION POLICY. 2. Back up files to tertiary device such as tape using RMAN BACKUP RECOVERY AREA command. 3. Add disk space and increase db_recovery_file_dest_size parameter to reflect the new space. 4. Delete unnecessary files using RMAN DELETE command. If an operating system command was used to delete files, then use RMAN CROSSCHECK and DELETE EXPIRED commands. ************************************************************************ cat /u01/app/oracle/diag/rdbms/ugaryd/ugaryd1/trace/ugaryd1_tt00_8810.trc|more *** 2025-01-09T02:04:41.313767-05:00 *** SESSION ID:(200.33043) 2025-01-09T02:04:41.313824-05:00 *** CLIENT ID:() 2025-01-09T02:04:41.313835-05:00 *** SERVICE NAME:(SYS$BACKGROUND) 2025-01-09T02:04:41.313841-05:00 *** MODULE NAME:() 2025-01-09T02:04:41.313847-05:00 *** ACTION NAME:() 2025-01-09T02:04:41.313853-05:00 *** CLIENT DRIVER:() 2025-01-09T02:04:41.313858-05:00 ORA-19815: WARNING: db_recovery_file_dest_size of 1073741824 bytes is 100.00% used, and has 0 remaining bytes available. 2025-01-09 02:04:41.315*:KRA:kra.c@2332:kraalert(): ************************************************************************ 2025-01-09 02:04:41.315*:KRA:kra.c@2334:kraalert(): You have following choices to free up space from recovery area: 2025-01-09 02:04:41.315*:KRA:kra.c@2336:kraalert(): 1. Consider changing RMAN RETENTION POLICY. If you are using Data Guard, 2025-01-09 02:04:41.315*:KRA:kra.c@2338:kraalert(): then consider changing RMAN ARCHIVELOG DELETION POLICY. 2025-01-09 02:04:41.315*:KRA:kra.c@2340:kraalert(): 2. Back up files to tertiary device such as tape using RMAN 2025-01-09 02:04:41.315*:KRA:kra.c@2342:kraalert(): BACKUP RECOVERY AREA command. 2025-01-09 02:04:41.315*:KRA:kra.c@2345:kraalert(): 3. Add disk space and increase db_recovery_file_dest_size parameter to 2025-01-09 02:04:41.315*:KRA:kra.c@2347:kraalert(): reflect the new space. 2025-01-09 02:04:41.315*:KRA:kra.c@2349:kraalert(): 4. Delete unnecessary files using RMAN DELETE command. If an operating 2025-01-09 02:04:41.315*:KRA:kra.c@2351:kraalert(): system command was used to delete files, then use RMAN CROSSCHECK and 2025-01-09 02:04:41.315*:KRA:kra.c@2353:kraalert(): DELETE EXPIRED commands. 2025-01-09 02:04:41.315*:KRA:kra.c@2355:kraalert(): ************************************************************************ ORA-19809: limit exceeded for recovery files ORA-19804: cannot reclaim 105906176 bytes disk space from 1073741824 bytes limit krsi_dest_check: Exception when reserving disk space for OMF, or getting file name or creating test file krsd_check_stuck_arch: inactive mandatory LAD:1 check space set linesize 300 col FILE_TYPE for a30 col PERCENT_SPACE_USED for 999.99 heading 'PERCENT_SPACE_USED%' SELECT NVL(FRAU.FILE_TYPE, 'Total:') FILE_TYPE, SUM(ROUND(FRAU.PERCENT_SPACE_USED / 100 * RFD.SPACE_LIMIT / 1024 / 1024 / 1024,3)) USED_GB, SUM(FRAU.PERCENT_SPACE_USED) PERCENT_SPACE_USED, SUM(FRAU.PERCENT_SPACE_RECLAIMABLE) PERCENT_SPACE_RECLAIMABLE, SUM(ROUND(FRAU.PERCENT_SPACE_RECLAIMABLE / 100 * RFD.SPACE_LIMIT / 1024 / 1024 / 1024,3)) RECLAIM_GB, SUM(FRAU.NUMBER_OF_FILES) NUMBER_OF_FILES, SUM(FRAU.PERCENT_SPACE_USED) PERCENT_SPACE_USED FROM V$FLASH_RECOVERY_AREA_USAGE FRAU, V$RECOVERY_FILE_DEST RFD GROUP BY ROLLUP(FILE_TYPE); FILE_TYPE USED PERCENT_SPACE_USED% PERCENT_SPACE_RECLAIMABLE RECLAIM NUMBER_OF_FILE PERCENT_SPACE_USED% ------------------------------ ---------- ------------------- ------------------------- ---------- -------------- ------------------- ARCHIVED LOG 1942M 189.65 0 0 27 189.65 AUXILIARY DATAFILE COPY 0 .00 0 0 0 .00 BACKUP PIECE 0 .00 0 0 0 .00 CONTROL FILE 13M 1.27 0 0 1 1.27 FLASHBACK LOG 0 .00 0 0 0 .00 FOREIGN ARCHIVED LOG 0 .00 0 0 0 .00 IMAGE COPY 0 .00 0 0 0 .00 REDO LOG 0 .00 0 0 0 .00 Total: 1955M 190.92 0 0 28 190.92 9 rows selected. SQL> show parameter DB_RECOVERY_FILE_DEST_SIZE NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_recovery_file_dest_size big integer 1G ALTER SYSTEM SET DB_RECOVERY_FILE_DEST_SIZE = 10G scope=both sid='*'; alter system set db_recovery_file_dest='+FRA' scope=both sid='*'; alter system switch logfile; delete force archivelog all completed before 'sysdate-1/24'; set linesize 300 col FILE_TYPE for a30 col PERCENT_SPACE_USED for 999.99 heading 'PERCENT_SPACE_USED%' col USED_GB for 999.99 col "PERCENT_SPACE_USED%" for 999.99 col 'PERCENT_SPACE_RECLAIMABLE%' for 999.99 col RECLAIM for a10 col NUMBER_OF_FILES for a14 col USED for a10 SELECT NVL(FRAU.FILE_TYPE, 'Total:') FILE_TYPE, dbms_xplan.format_size(SUM(ROUND(FRAU.PERCENT_SPACE_USED / 100 * RFD.SPACE_LIMIT ))) USED, SUM(FRAU.PERCENT_SPACE_USED) PERCENT_SPACE_USED, SUM(FRAU.PERCENT_SPACE_RECLAIMABLE) PERCENT_SPACE_RECLAIMABLE, dbms_xplan.format_size(SUM(ROUND(FRAU.PERCENT_SPACE_RECLAIMABLE / 100 * RFD.SPACE_LIMIT ))) RECLAIM, dbms_xplan.format_Number(SUM(FRAU.NUMBER_OF_FILES)) NUMBER_OF_FILES, SUM(FRAU.PERCENT_SPACE_USED) PERCENT_SPACE_USED FROM V$FLASH_RECOVERY_AREA_USAGE FRAU, V$RECOVERY_FILE_DEST RFD GROUP BY ROLLUP(FILE_TYPE); FILE_TYPE USED PERCENT_SPACE_USED% PERCENT_SPACE_RECLAIMABLE RECLAIM NUMBER_OF_FILE PERCENT_SPACE_USED% ------------------------------ ---------- ------------------- ------------------------- ---------- -------------- ------------------- ARCHIVED LOG 1942M 189.65 0 0 27 189.65 AUXILIARY DATAFILE COPY 0 .00 0 0 0 .00 BACKUP PIECE 0 .00 0 0 0 .00 CONTROL FILE 13M 1.27 0 0 1 1.27 FLASHBACK LOG 0 .00 0 0 0 .00 FOREIGN ARCHIVED LOG 0 .00 0 0 0 .00 IMAGE COPY 0 .00 0 0 0 .00 REDO LOG 0 .00 0 0 0 .00 Total: 1955M 190.92 0 0 28 190.92 9 rows selected. run { crosscheck backupset of database; crosscheck backupset of controlfile; crosscheck backupset of archivelog all; crosscheck backup; delete noprompt expired backup; delete force noprompt obsolete; delete expired archivelog all; delete noprompt obsolete; delete noprompt obsolete orphan; crosscheck archivelog all; delete expired archivelog all; CROSSCHECK COPY OF CONTROLFILE; }
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