Database Buffers 197132288 bytes

Redo Buffers 2973696 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 6 - see DBWR trace file

ORA-01110: data file 6: '/u01/app/oracle/oradata/ORCL/bbed_test_tbs01.dbf'

数据库无法启动因为此时datafile 6丢失，使用rman的备份恢复数据文件，尝试打开数据库

RMAN> restore datafile 6;?

Starting restore at 19-JUN-14

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=155 devtype=DISK?

channel ORA_DISK_1: starting datafile backupset restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

restoring datafile 00006 to /u01/app/oracle/oradata/ORCL/bbed_test_tbs01.dbf

channel ORA_DISK_1: reading from backup piece /u01/app/oracle/flash_recovery_area/ORCL/backupset/2014_06_19/o1_mf_nnndf_TAG20140619T213426_9t73x2s8_.bkp

channel ORA_DISK_1: restored backup piece 1

piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2014_06_19/o1_mf_nnndf_TAG20140619T213426_9t73x2s8_.bkp tag=TAG20140619T213426

channel ORA_DISK_1: restore complete, elapsed time: 00:00:01

Finished restore at 19-JUN-14?

SYS@ORCL>alter database open;

alter database open

*

ERROR at line 1:

ORA-01113: file 6 needs media recovery

ORA-01110: data file 6: '/u01/app/oracle/oradata/ORCL/bbed_test_tbs01.dbf'

此时报datafile 6需要进行recover。

这时我们删除归档，然后尝试recover datafile 6

[oracle@jp archivelog]$ cd 2014_06_19/

[oracle@jp 2014_06_19]$ ls

o1_mf_1_3_9t73hdco_.arc o1_mf_1_5_9t740dxd_.arc

o1_mf_1_4_9t74035o_.arc o1_mf_1_6_9t740sv7_.arc

[oracle@jp 2014_06_19]$ rm -f *

[oracle@jp 2014_06_19]$ ls?

SYS@ORCL>recover datafile 6;

ORA-00279: change 507768 generated at 06/19/2014 21:34:26 needed for thread 1

ORA-00289: suggestion :

/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_06_19/o1_mf_1_4_%u_.arc

ORA-00280: change 507768 for thread 1 is in sequence #4?

Specify log: {=suggested | filename | AUTO | CANCEL}?

ORA-00308: cannot open archived log

'/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_06_19/o1_mf_1_4_9t7403

5o_.arc'

ORA-27037: unable to obtain file status

Linux Error: 2: No such file or directory

Additional information: 3

无法恢复，提示需要的归档文件不存在

Dump出文件头：

SYS@ORCL>alter session set events 'immediate trace name file_hdrs level 10';?

Session altered.?

SYS@ORCL>SYS@ORCL>oradebug setmypid;

Statement processed.

SYS@ORCL>oradebug tracefile_name

/u01/app/oracle/admin/ORCL/udump/orcl_ora_9065.trc

查看dump文件：

DATA FILE #1:

(name #7) /u01/app/oracle/oradata/ORCL/system01.dbf

creation size=0 block size=8192 status=0xe head=7 tail=7 dup=1

tablespace 0, index=1 krfil=1 prev_file=0

unrecoverable scn: 0x0000.00000000 01/01/1988 00:00:00

Checkpoint cnt:56 scn: 0x0000.0007c39c 06/19/2014 21:37:19

Stop scn: 0x0000.0007c39c 06/19/2014 21:37:19

Creation Checkpointed at scn: 0x0000.00000009 06/30/2005 19:10:11

thread:0 rba:(0x0.0.0)

这时system数据文件的，然后我们使用bbed将datafile 6的scn和system数据文件的scn改为一致。

BBED> set dba 6,1

DBA 0x01800001 (25165825 6,1)?

BBED> map

File: /u01/app/oracle/oradata/ORCL/bbed_test_tbs01.dbf (6)

Block: 1 Dba:0x01800001

------------------------------------------------------------

Data File Header?

struct kcvfh, 676 bytes @0?

ub4 tailchk @8188?

BBED> p kcvfhckp

struct kcvfhckp, 36 bytes @484

struct kcvcpscn, 8 bytes @484