1088247 12-DEC-13 /u01/oracle/oradata/justdb/system01.dbf
2 Full 1088247 12-DEC-13 /u01/oracle/oradata/justdb/sysaux01.dbf
3 Full 1088247 12-DEC-13 /u01/oracle/oradata/justdb/undotbs01.dbf
4 Full 1088247 12-DEC-13 /u01/oracle/oradata/justdb/users01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
15 Full 9.36M DISK 00:00:01 12-DEC-13
BP Key: 15 Status: AVAILABLE Compressed: NO Tag: TAG20131212T095816
Piece Name: /u01/oracle/fast_recovery_area/JUSTDB/backupset/2013_12_12/o1_mf_ncsnf_TAG20131212T095816_9bl62lw2_.bkp
SPFILE Included: Modification time: 12-DEC-13
SPFILE db_unique_name: JUSTDB
Control File Included: Ckp SCN: 1088267 Ckp time: 12-DEC-13
SQL> CONN SCOTT/tiger;
Connected.
SQL> SELECT * FROM tab;
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
BONUS TABLE
DEPT TABLE
EMP TABLE
SALGRADE TABLE
Step2，SQL Plus中删除USERS表空间，模拟USERS表空间丢失
SQL> HO mv /u01/oracle/oradata/justdb/users01.dbf /opt/learn/
Step 3，scott用户查看数据失败
SQL> CONN SCOTT/tiger;
Connected.
SQL> DESC dept;
ERROR:
ORA-01116: error in opening database file 4
ORA-01110: data file 4: '/u01/oracle/oradata/justdb/users01.dbf'
ORA-27041: unable to open file
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Step4，SQL Plus中使第4号数据文件离线
SQL> CONN / AS SYSDBA;
Connected.
SQL> ALTER DATABASE DATAFILE 4 OFFLINE;
Database altered.
Step5，RMAN中还原4号数据文件
RMAN> RESTORE DATAFILE 4;
Starting restore at 12-DEC-13
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1 device type=DISK
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00004 to /u01/oracle/oradata/justdb/users01.dbf
channel ORA_DISK_1: reading from backup piece /u01/oracle/fast_recovery_area/JUSTDB/backupset/2013_12_12/o1_mf_nnndf_TAG20131212T095816_9bl61rrn_.bkp
channel ORA_DISK_1: piece handle=/u01/oracle/fast_recovery_area/JUSTDB/backupset/2013_12_12/o1_mf_nnndf_TAG20131212T095816_9bl61rrn_.bkp tag=TAG20131212T095816
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
Finished restore at 12-DEC-13
Step6，RMAN中恢复4号文件
RMAN> RECOVER DATAFILE 4;
Starting recover at 12-DEC-13
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:00
Finished recover at 12-DEC-13
Step7，SQL Plus中使4号数据文件在线
SQL> ALTER DATABASE DATAFILE 4 ONLINE;
Database altered.
Step8，SQL Plus中查看数据
SQL> CONN SCOTT/tiger;
Connected.
SQL> DESC dept;
Name Null Type
----------------------------------------- -------- ----------------------------
DEPTNO NOT NULL NUMBER(2)
DNAME VARCHAR2(14)
LOC VARCHAR2(13)
SQL> SELECT * FROM dept;
DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
四 相关文章
RMAN备份与恢复之控制文件丢失
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All is well
2014年1月15日
By Larry Wen
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