如果丟失或損壞所有的控制文件就需要從備份中還原控制文件。restore controlfile命令用來還原控制文件。在還原控制文件后需要對數

如果丟失或損壞所有的控制文件就需要從備份中還原控制文件。restore controlfile命令用來還原控制文件。在還原控制文件后需要對數據畝執行完全介質恢復并以resetlog選項來打開數據庫。RMAN可以將控制文件還原到它的默認存儲位置，也可以使用restore controlfile ... to destination來指定位置。

從已經知的控制文件備份中還原控制文件
SQL> show parameter control_files

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
control_files string /u01/app/Oracle/oradata/test/c
ontrol01.ctl, /u01/app/oracle/
oradata/test/control02.ctl, /u
01/app/oracle/oradata/test/con
trol03.ctl

顯示當前可用的備份
RMAN> list backup;

List of Backup Sets
===================

BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
77 693.50K DISK 00:00:02 28-JAN-15
BP Key: 75 Status: AVAILABLE Compressed: YES Tag: TAG20150128T131713
Piece Name: /u02/test_df870182233_s95_s1

List of Archived Logs in backup set 77
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- --------- ---------- ---------
1 13 2928236 28-JAN-15 2928830 28-JAN-15

BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
78 Full 166.91M DISK 00:01:19 28-JAN-15
BP Key: 76 Status: AVAILABLE Compressed: YES Tag: TAG20150128T131716
Piece Name: /u02/test_df870182236_s96_s1
List of Datafiles in backup set 78
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
1 Full 2928835 28-JAN-15 /u01/app/oracle/oradata/test/system01.dbf
2 Full 2928835 28-JAN-15 /u01/app/oracle/oradata/test/undotbs01.dbf
3 Full 2928835 28-JAN-15 /u01/app/oracle/oradata/test/sysaux01.dbf
4 Full 2928835 28-JAN-15 /u01/app/oracle/oradata/test/users01.dbf
5 Full 2928835 28-JAN-15 /u01/app/oracle/oradata/test/example01.dbf
6 Full 2928835 28-JAN-15 /u01/app/oracle/oradata/test/test01.dbf

BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
79 7.50K DISK 00:00:01 28-JAN-15
BP Key: 77 Status: AVAILABLE Compressed: YES Tag: TAG20150128T131841
Piece Name: /u02/test_df870182321_s97_s1

List of Archived Logs in backup set 79
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- --------- ---------- ---------
1 14 2928830 28-JAN-15 2928868 28-JAN-15

BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
80 Full 9.42M DISK 00:00:02 28-JAN-15
BP Key: 78 Status: AVAILABLE Compressed: NO Tag: TAG20150128T131843
Piece Name: /u01/app/oracle/10.2.0/db/dbs/c-2155613261-20150128-0d
Control File Included: Ckp SCN: 2928874 Ckp time: 28-JAN-15
SPFILE Included: Modification time: 28-JAN-15

從上面的信息可以看到備份集80是控制文件與spfile文件的備份

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