查看文件頭SCN號：

    SQL> select file#, checkpoint_change# from v$datafile_header;

    FILE# CHECKPOINT_CHANGE#

    ---------- ------------------

    1    18120070

    2    18120070

    3    18120070

    4    18120070

    5    18120070

    6    18120070

    7    18120070

    8    18120070

    9    18120070

    10    18120070

    11    18121207

    FILE# CHECKPOINT_CHANGE#

    ---------- ------------------

    12    18121196

    12 rows selected.

    查看控制文件SCN號：

    SQL> select file#, checkpoint_change# from v$datafile;

    FILE# CHECKPOINT_CHANGE#

    ---------- ------------------

    1    18120070

    2    18120070

    3    18120070

    4    18120070

    5    18120070

    6    18120070

    7    18120070

    8    18120070

    9    18120070

    10    18120070

    11    18121207

    FILE# CHECKPOINT_CHANGE#

    ---------- ------------------

    12    18121196

    12 rows selected.

    SQL>

    當(dāng)數(shù)據(jù)文件SCN號大于控制文件scn號，即會發(fā)生控制文件太久的提示，

    當(dāng)數(shù)據(jù)文件SCN號小于控制文件scn號時， 則提示mediea recovery提示

    當(dāng)數(shù)據(jù)文件sCN號等于控制文件scn號，正常啟動實例

    SQL> alter database backup controlfile to trace as '/u01/Oracle/admin/ora9i/udump/c.trc';

    Database altered.

    SQL>

    /u01/Oracle/oradata/ora9i

    [oracle@test ora9i]$ rm control0*

    [oracle@test ora9i]$

    SQL> shutdown immediate;

    ORA-00210: cannot open the specified controlfile

    ORA-00202: controlfile: '/u01/Oracle/oradata/ora9i/control01.ctl'

    ORA-27041: unable to open file

    Linux Error: 2: No such file or directory

    Additional information: 3

    SQL> shutdown abort;

    ORACLE instance shut down.

    SQL>

    修改備份c.trc文件使用第一個sql

    STARTUP NOMOUNT

    CREATE CONTROLFILE REUSE DATABASE "ORA9I" NORESETLOGS  ARCHIVELOG

    MAXLOGFILES 50

    MAXLOGMEMBERS 5

    MAXDATAFILES 100

    MAXINSTANCES 1

    MAXLOGHISTORY 226

    LOGFILE

    GROUP 1 '/u01/Oracle/oradata/ora9i/redo01.log'  SIZE 100M,

    GROUP 2 '/u01/Oracle/oradata/ora9i/redo02.log'  SIZE 100M,

    GROUP 3 '/u01/Oracle/oradata/ora9i/redo03.log'  SIZE 100M

    DATAFILE

    '/u01/Oracle/oradata/ora9i/system01.dbf',

    '/u01/Oracle/oradata/ora9i/undotbs01.dbf',

    '/u01/Oracle/oradata/ora9i/cwmlite01.dbf',

    '/u01/Oracle/oradata/ora9i/drsys01.dbf',

    '/u01/Oracle/oradata/ora9i/example01.dbf',

    '/u01/Oracle/oradata/ora9i/indx01.dbf',

    '/u01/Oracle/oradata/ora9i/odm01.dbf',

    '/u01/Oracle/oradata/ora9i/tools01.dbf',

    '/u01/Oracle/oradata/ora9i/users01.dbf',

    '/u01/Oracle/oradata/ora9i/xdb01.dbf',

    '/u01/Oracle/oradata/ora9i/app2.dbf',

    '/u01/Oracle/oradata/ora9i/app1_01.dbf'

    CHARACTER SET ZHS16GBK

    ;

    # Configure RMAN configuration record 1

    VARIABLE RECNO NUMBER;

    EXECUTE :RECNO := SYS.DBMS_BACKUP_RESTORE.SETCONFIG（'CONTROLFILE AUTOBACKUP','ON'）；

    # Recovery is required if any of the datafiles are restored backups,

    # or if the last shutdown was not normal or immediate.

    RECOVER DATABASE

    # All logs need archiving and a log switch is needed.

    ALTER SYSTEM ARCHIVE LOG ALL;

    # Database can now be opened normally.

    ALTER DATABASE OPEN;

    # Commands to add tempfiles to temporary tablespaces.

    # Online tempfiles have complete space information.

    # Other tempfiles may require adjustment.

    ALTER TABLESPACE TEMP ADD TEMPFILE '/u01/Oracle/oradata/ora9i/temp01.dbf' REUSE;

    # End of tempfile additions.

    #