OS 환경 : Oracle Linux 6.8 (64bit)
DB 환경 : Oracle Database 11.2.0.4
방법 : 오라클 rman에서 show all 정보와 list backup 정보는 어디있을까?
rman 사전 설정
백업 경로 지정
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$ mkdir -p /home/oracle/rman/
$ rman target /
RMAN> configure channel device type disk format '/home/oracle/rman/db_%U_%T';
new RMAN configuration parameters:
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/home/oracle/rman/db_%U_%T';
new RMAN configuration parameters are successfully stored
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컨트롤파일 자동 백업 옵션 및 경로 지정
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RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON;
new RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
new RMAN configuration parameters are successfully stored
RMAN> CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/home/oracle/rman/db_control_%F';
new RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/home/oracle/rman/db_control_%F';
new RMAN configuration parameters are successfully stored
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rman 설정 확인
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RMAN> show all;
using target database control file instead of recovery catalog
RMAN configuration parameters for database with db_unique_name RACDB are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/home/oracle/rman/db_control_%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/home/oracle/rman/db_%U_%T';
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/app/oracle/product/11.2.0/db_1/dbs/snapcf_racdb.f'; # default
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백업 실행
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RMAN> backup database;
Starting backup at 22-FEB-20
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=52 instance=racdb1 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=00008 name=+ORADATA/racdb/datafile/bokgu.270.1033003033
input datafile file number=00001 name=+ORADATA/racdb/datafile/system.259.970626167
input datafile file number=00002 name=+ORADATA/racdb/datafile/sysaux.260.970626173
input datafile file number=00003 name=+ORADATA/racdb/datafile/undotbs1.261.970626177
input datafile file number=00004 name=+ORADATA/racdb/datafile/undotbs2.263.970626185
input datafile file number=00006 name=+ORADATA/racdb/datafile/users.268.970884085
input datafile file number=00007 name=+ORADATA/racdb/datafile/users.269.970884253
input datafile file number=00005 name=+ORADATA/racdb/datafile/users.264.970626185
channel ORA_DISK_1: starting piece 1 at 22-FEB-20
channel ORA_DISK_1: finished piece 1 at 22-FEB-20
piece handle=/home/oracle/rman/db_01up4p9p_1_1_20200222 tag=TAG20200222T013905 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
Finished backup at 22-FEB-20
Starting Control File and SPFILE Autobackup at 22-FEB-20
piece handle=/home/oracle/rman/db_control_c-968242930-20200222-00 comment=NONE
Finished Control File and SPFILE Autobackup at 22-FEB-20
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백업본 확인
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$ ls -al /home/oracle/rman/
total 296172
drwxr-xr-x 2 oracle dba 80 Feb 22 01:39 .
drwxr-xr-x. 11 oracle dba 4096 Feb 22 01:28 ..
-rw-r----- 1 oracle dba 284696576 Feb 22 01:39 db_01up4p9p_1_1_20200222
-rw-r----- 1 oracle dba 18579456 Feb 22 01:39 db_control_c-968242930-20200222-00
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datafile, redo log file, control file 모두 삭제
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$ rm -rf /app/oracle/oradata/newdev/*
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nomount 로 startup
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SQL> startup nomount
ORACLE instance started.
Total System Global Area 1686925312 bytes
Fixed Size 2253864 bytes
Variable Size 419433432 bytes
Database Buffers 1258291200 bytes
Redo Buffers 6946816 bytes
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rman 접속 후 show all 정보 확인
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$ rman target /
Recovery Manager: Release 11.2.0.4.0 - Production on Tue Feb 25 07:55:33 2020
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: RACDB (not mounted)
RMAN> show all;
using target database control file instead of recovery catalog
RMAN configuration parameters for database with db_unique_name RACDB are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
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모두 default 값임
report schema 명령 확인
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RMAN> report schema;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of report command at 02/25/2020 07:56:16
ORA-01507: database not mounted
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db가 mount 상태가 아니어서 나오지 않음
컨트롤파일 백업본 restore
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RMAN> restore controlfile from '/home/oracle/rman/db_control_c-968242930-20200222-00';
Starting restore at 25-FEB-20
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=20 device type=DISK
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/app/oracle/oradata/newdev/control01.ctl
output file name=/app/oracle/oradata/newdev/control02.ctl
Finished restore at 25-FEB-20
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show all 과 report schema 확인
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RMAN> show all;
RMAN configuration parameters for database with db_unique_name RACDB are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
RMAN> report schema;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of report command at 02/25/2020 07:58:11
ORA-01507: database not mounted
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show all은 아직 default 값이 나오고 report schema명령은 여전히 db가 mount 상태가 아니어서 나오지 않음
db mount 상태로 변경
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RMAN> sql 'alter database mount';
sql statement: alter database mount
released channel: ORA_DISK_1
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show all 과 report schema 확인
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RMAN> show all;
RMAN configuration parameters for database with db_unique_name RACDB are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/home/oracle/rman/db_control_%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/home/oracle/rman/db_%U_%T';
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/app/oracle/product/11.2.0/db_1/dbs/snapcf_racdb.f'; # default
RMAN> report schema;
RMAN-06139: WARNING: control file is not current for REPORT SCHEMA
Report of database schema for database with db_unique_name RACDB
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 0 SYSTEM *** +ORADATA/racdb/datafile/system.259.970626167
2 0 SYSAUX *** +ORADATA/racdb/datafile/sysaux.260.970626173
3 0 UNDOTBS1 *** +ORADATA/racdb/datafile/undotbs1.261.970626177
4 0 UNDOTBS2 *** +ORADATA/racdb/datafile/undotbs2.263.970626185
5 0 USERS *** +ORADATA/racdb/datafile/users.264.970626185
6 0 USERS *** +ORADATA/racdb/datafile/users.268.970884085
7 0 USERS *** +ORADATA/racdb/datafile/users.269.970884253
8 0 BOKGU *** +ORADATA/racdb/datafile/bokgu.270.1033003033
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 20 TEMP 32767 +ORADATA/racdb/tempfile/temp.262.970626177
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show all 값도 정상적으로 가지고오고 report schema도 제대로 가지고옴
list backup 으로 백업현황 확인
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RMAN> list backup;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
1 Full 271.50M DISK 00:00:04 22-FEB-20
BP Key: 1 Status: AVAILABLE Compressed: NO Tag: TAG20200222T013905
Piece Name: /home/oracle/rman/db_01up4p9p_1_1_20200222
List of Datafiles in backup set 1
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
1 Full 241661 22-FEB-20 +ORADATA/racdb/datafile/system.259.970626167
2 Full 241661 22-FEB-20 +ORADATA/racdb/datafile/sysaux.260.970626173
3 Full 241661 22-FEB-20 +ORADATA/racdb/datafile/undotbs1.261.970626177
4 Full 241661 22-FEB-20 +ORADATA/racdb/datafile/undotbs2.263.970626185
5 Full 241661 22-FEB-20 +ORADATA/racdb/datafile/users.264.970626185
6 Full 241661 22-FEB-20 +ORADATA/racdb/datafile/users.268.970884085
7 Full 241661 22-FEB-20 +ORADATA/racdb/datafile/users.269.970884253
8 Full 241661 22-FEB-20 +ORADATA/racdb/datafile/bokgu.270.1033003033
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정상적으로 나옴
위 테스트로 rman 관련된 정보는 control file에 있다는걸 알수있다.
그렇다면 control file 을 재생성 했을 때도 이 정보가 남아있을까?
db 종료
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SQL> shutdown immediate
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
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미리 만들어둔 control file 생성문 recon.sql
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SQL> STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "RACDB" RESETLOGS ARCHIVELOG
MAXLOGFILES 192
MAXLOGMEMBERS 3
MAXDATAFILES 1024
MAXINSTANCES 32
MAXLOGHISTORY 292
LOGFILE
GROUP 1 (
'/app/oracle/oradata/newdev/redo01.log'
) SIZE 50M BLOCKSIZE 512,
GROUP 2 (
'/app/oracle/oradata/newdev/redo02.log'
) SIZE 50M BLOCKSIZE 512,
GROUP 3 (
'/app/oracle/oradata/newdev/redo03.log'
) SIZE 50M BLOCKSIZE 512
DATAFILE
'/app/oracle/oradata/newdev/system01.dbf',
'/app/oracle/oradata/newdev/sysaux01.dbf',
'/app/oracle/oradata/newdev/undotbs01.dbf',
'/app/oracle/oradata/newdev/undotbs02.dbf',
'/app/oracle/oradata/newdev/bokgu01.dbf'
CHARACTER SET KO16MSWIN949
;
VARIABLE RECNO NUMBER;
EXECUTE :RECNO := SYS.DBMS_BACKUP_RESTORE.SETCONFIG('CONTROLFILE AUTOBACKUP','ON');
VARIABLE RECNO NUMBER;
EXECUTE :RECNO := SYS.DBMS_BACKUP_RESTORE.SETCONFIG('CHANNEL','DEVICE TYPE DISK FORMAT ''/home/oracle/rman/db_%U_%T''');
VARIABLE RECNO NUMBER;
EXECUTE :RECNO := SYS.DBMS_BACKUP_RESTORE.SETCONFIG('CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE','DISK TO ''/home/oracle/rman/db_control_%F''');
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실행
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SQL> @recon.sql
ORACLE instance started.
Total System Global Area 1686925312 bytes
Fixed Size 2253864 bytes
Variable Size 419433432 bytes
Database Buffers 1258291200 bytes
Redo Buffers 6946816 bytes
CREATE CONTROLFILE REUSE DATABASE "RACDB" RESETLOGS ARCHIVELOG
*
ERROR at line 1:
ORA-01503: CREATE CONTROLFILE failed
ORA-01565: error in identifying file '/app/oracle/oradata/newdev/system01.dbf'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
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데이터파일을 restore 하지 않아 control file이 생성되지 않음
다시 mount 상태로 만든 뒤 데이터파일 restore
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RMAN> run {
allocate channel ch1 device type disk ;
allocate channel ch2 device type disk ;
set newname for tempfile 1 to '/app/oracle/oradata/newdev/temp01.dbf';
set newname for datafile 1 to '/app/oracle/oradata/newdev/system01.dbf' ;
set newname for datafile 2 to '/app/oracle/oradata/newdev/sysaux01.dbf' ;
set newname for datafile 3 to '/app/oracle/oradata/newdev/undotbs01.dbf' ;
set newname for datafile 4 to '/app/oracle/oradata/newdev/undotbs02.dbf' ;
set newname for datafile 8 to '/app/oracle/oradata/newdev/bokgu01.dbf' ;
#restore database skip tablespace 'users';
restore datafile 1,2,3,4,8;
switch datafile all;
switch tempfile all;
} <- 이까지 입력 후 엔터
allocated channel: ch1
channel ch1: SID=19 device type=DISK
allocated channel: ch2
channel ch2: SID=20 device type=DISK
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting restore at 23-FEB-20
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00001 to /app/oracle/oradata/newdev/system01.dbf
channel ch1: restoring datafile 00002 to /app/oracle/oradata/newdev/sysaux01.dbf
channel ch1: restoring datafile 00003 to /app/oracle/oradata/newdev/undotbs01.dbf
channel ch1: restoring datafile 00004 to /app/oracle/oradata/newdev/undotbs02.dbf
channel ch1: restoring datafile 00008 to /app/oracle/oradata/newdev/bokgu01.dbf
channel ch1: reading from backup piece /home/oracle/rman/db_01up4p9p_1_1_20200222
channel ch1: piece handle=/home/oracle/rman/db_01up4p9p_1_1_20200222 tag=TAG20200222T013905
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:26
Finished restore at 23-FEB-20
datafile 1 switched to datafile copy
input datafile copy RECID=6 STAMP=1033105122 file name=/app/oracle/oradata/newdev/system01.dbf
datafile 2 switched to datafile copy
input datafile copy RECID=7 STAMP=1033105122 file name=/app/oracle/oradata/newdev/sysaux01.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=8 STAMP=1033105122 file name=/app/oracle/oradata/newdev/undotbs01.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=9 STAMP=1033105122 file name=/app/oracle/oradata/newdev/undotbs02.dbf
datafile 8 switched to datafile copy
input datafile copy RECID=10 STAMP=1033105122 file name=/app/oracle/oradata/newdev/bokgu01.dbf
renamed tempfile 1 to /app/oracle/oradata/newdev/temp01.dbf in control file
released channel: ch1
released channel: ch2
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데이터 파일 확인
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$ ls -al /app/oracle/oradata/newdev/
total 2825568
drwxr-xr-x. 2 oracle oinstall 4096 Feb 25 08:09 .
drwxr-x---. 4 oracle oinstall 4096 Feb 23 02:28 ..
-rw-r-----. 1 oracle oinstall 1073750016 Feb 25 08:09 bokgu01.dbf
-rw-r-----. 1 oracle oinstall 18497536 Feb 25 08:10 control01.ctl
-rw-r-----. 1 oracle oinstall 18497536 Feb 25 08:10 control02.ctl
-rw-r-----. 1 oracle oinstall 629153792 Feb 25 08:10 sysaux01.dbf
-rw-r-----. 1 oracle oinstall 734011392 Feb 25 08:10 system01.dbf
-rw-r-----. 1 oracle oinstall 209723392 Feb 25 08:10 undotbs01.dbf
-rw-r-----. 1 oracle oinstall 209723392 Feb 25 08:09 undotbs02.dbf
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control file 재생성을 위해 다시 shutdown
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SQL> shutdown immediate
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
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기존 컨트롤파일 삭제 후 재생성
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$ cd /app/oracle/oradata/newdev/
$ ls
bokgu01.dbf control01.ctl control02.ctl sysaux01.dbf system01.dbf undotbs01.dbf undotbs02.dbf
$ rm control0*
$ ls
bokgu01.dbf sysaux01.dbf system01.dbf undotbs01.dbf undotbs02.dbf
$ sqlplus / as sysdba
SQL> @recon
ORACLE instance started.
Total System Global Area 1686925312 bytes
Fixed Size 2253864 bytes
Variable Size 419433432 bytes
Database Buffers 1258291200 bytes
Redo Buffers 6946816 bytes
Control file created.
PL/SQL procedure successfully completed.
PL/SQL procedure successfully completed.
PL/SQL procedure successfully completed.
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show all, report schema, list backup 확인
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RMAN> show all;
using target database control file instead of recovery catalog
RMAN configuration parameters for database with db_unique_name RACDB are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/home/oracle/rman/db_control_%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/home/oracle/rman/db_%U_%T';
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/app/oracle/product/11.2.0/db_1/dbs/snapcf_racdb.f'; # default
RMAN> report schema;
RMAN-06139: WARNING: control file is not current for REPORT SCHEMA
Report of database schema for database with db_unique_name RACDB
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 700 SYSTEM *** /app/oracle/oradata/newdev/system01.dbf
2 600 SYSAUX *** /app/oracle/oradata/newdev/sysaux01.dbf
3 200 UNDOTBS1 *** /app/oracle/oradata/newdev/undotbs01.dbf
4 200 UNDOTBS2 *** /app/oracle/oradata/newdev/undotbs02.dbf
8 1024 BOKGU *** /app/oracle/oradata/newdev/bokgu01.dbf
RMAN> list backup;
specification does not match any backup in the repository
|
show all은 기존과 똑같이 나오고 report schema는 새로 작성한 데이터파일 경로로 표시됨
하지만 list backup는 표시되지 않음, 재생성했기때문에 이 정보를 가지고 있지 않기 때문
이상태에서 다시 db를 내리고 db 백업 이후 백업된 컨트롤파일 백업본을 restore하면 모든 백업정보가 보임
결론 : rman에서의 백업 정보는 controlfile 에 기록되어 있다.
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