oracle数据库坏块恢复—存在rman备份
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文档课题：oracle数据库坏块恢复—存在rman备份.
数据库：oracle 19.12 多租户
1、坏块查询
SQL> set numw 20
SQL> set line 200
SQL> select * from v$database_block_corruption
FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO CON_ID
-------------------- -------------------- -------------------- -------------------- --------- --------------------
12 659 1 18446744072549497550 CORRUPT 3
12 1003 1 18446744072549497550 CORRUPT 3
2、校验文件
使用backup validate datafile校验数据文件12.
RMAN> backup validate datafile 12;
Starting backup at 15-JAN-23
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=28 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=00012 name=+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/users.279.1082994667
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
12 FAILED 0 763 3040 19014535
File Name: +DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/users.279.1082994667
Block Type Blocks Failing Blocks Processed
---------- -------------- ----------------
Data 0 1427
Index 0 85
Other 2 765
validate found one or more corrupt blocks
See trace file /u01/app/oracle/diag/rdbms/orclcdb/orclcdb/trace/orclcdb_ora_13324.trc for details
Finished backup at 15-JAN-23
RMAN> list failure;
Database Role: PRIMARY
List of Database Failures
=========================
Failure ID Priority Status Time Detected Summary
---------- -------- --------- ------------- -------
2182 HIGH OPEN 14-JAN-23 Datafile 12: '+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/users.279.1082994667' contains one or more corrupt blocks
RMAN> advise failure;
Database Role: PRIMARY
List of Database Failures
=========================
Failure ID Priority Status Time Detected Summary
---------- -------- --------- ------------- -------
2182 HIGH OPEN 14-JAN-23 Datafile 12: '+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/users.279.1082994667' contains one or more corrupt blocks
analyzing automatic repair options; this may take some time
using channel ORA_DISK_1
analyzing automatic repair options complete
Mandatory Manual Actions
========================
no manual actions available
Optional Manual Actions
=======================
no manual actions available
Automated Repair Options
========================
Option Repair Description
------ ------------------
1 Recover multiple corrupt blocks in datafile 12
Strategy: The repair includes complete media recovery with no data loss
Repair script: /u01/app/oracle/diag/rdbms/orclcdb/orclcdb/hm/reco_4023960909.hm
3、恢复损坏块
使用rman备份对坏块进行恢复.
RMAN> recover datafile 12 block 659,1003;
Starting recover at 15-JAN-23
using channel ORA_DISK_1
channel ORA_DISK_1: restoring block(s)
channel ORA_DISK_1: specifying block(s) to restore from backup set
restoring blocks of datafile 00012
channel ORA_DISK_1: reading from backup piece +DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/BACKUPSET/2023_01_14/nnndf0_tag20230114t180326_0.313.1126116417
channel ORA_DISK_1: piece handle=+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/BACKUPSET/2023_01_14/nnndf0_tag20230114t180326_0.313.1126116417 tag=TAG20230114T180326
channel ORA_DISK_1: restored block(s) from backup piece 1
channel ORA_DISK_1: block restore complete, elapsed time: 00:00:25
starting media recovery
media recovery complete, elapsed time: 00:00:07
Finished recover at 15-JAN-23
4、验证数据
SQL> select * from v$database_block_corruption;
no rows selected
SQL> select count(*) from ora1.emp;
COUNT(*)
--------------------
140
| 阿里云国内75折 回扣 微信号：monov8 |
| 阿里云国际，腾讯云国际，低至75折。AWS 93折 免费开户实名账号 代冲值 优惠多多 微信号：monov8 飞机：@monov6 |
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