SQL> delete from zlm.test1 where id=5;
1 row deleted.
SQL> commit;
Commit complete.
SQL> select * from zlm.test1;
ID OBJECT_NAME
---------- ---------------
1 ICOL$
2 I_USER1
3 CON$
4 UNDO$
SQL> select group#,status,archived from v$log;
GROUP# STATUS ARC
---------- ---------------- ---
1 CURRENT NO
2 INACTIVE YES
3 INACTIVE YES
--同样的，切3次归档，把online日志刷到归档去
SQL> alter system archive log current;
System altered.
SQL> alter system archive log current;
System altered.
SQL> alter system archive log current;
System altered.
SQL> select group#,status,archived from v$log;
GROUP# STATUS ARC
---------- ---------------- ---
1 CURRENT NO --此处online日志已经被刷新
2 ACTIVE YES
3 ACTIVE YES
--关闭数据库，在os级别删除datafile 6以及新增的归档日志文件
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> !
[oracle@ora10g ~]$ cd $ORACLE_BASE/oradata/ora10g
[oracle@ora10g ora10g]$ rm -f zlm01.dbf
[oracle@ora10g ora10g]$ cd $ORACLE_BASE/flash_recovery_area/ORA10G/archivelog/2014_09_18
[oracle@ora10g 2014_09_18]$ ll -lrth
total 9.5M
-rw-r----- 1 oracle oinstall 2.4M Sep 18 10:10 o1_mf_1_172_b1nhskdd_.arc
-rw-r----- 1 oracle oinstall 469K Sep 18 10:14 o1_mf_1_173_b1nj0wxp_.arc
-rw-r----- 1 oracle oinstall 6.1M Sep 18 13:49 o1_mf_1_174_b1nwmrpv_.arc
-rw-r----- 1 oracle oinstall 1.0K Sep 18 13:49 o1_mf_1_175_b1nwmzo4_.arc
-rw-r----- 1 oracle oinstall 2.5K Sep 18 13:49 o1_mf_1_176_b1nwn43r_.arc
-rw-r----- 1 oracle oinstall 37K Sep 18 13:51 o1_mf_1_177_b1nwpwxb_.arc
-rw-r----- 1 oracle oinstall 477K Sep 18 14:01 o1_mf_1_178_b1nx9ry9_.arc
-rw-r----- 1 oracle oinstall 1.0K Sep 18 14:01 o1_mf_1_179_b1nx9y1k_.arc
-rw-r----- 1 oracle oinstall 7.0K Sep 18 14:01 o1_mf_1_180_b1nxb6q1_.arc
这里14:01生成的3个归档日志，是我在删除测试表数据库后归档current online日志生成的
--为了方便恢复，移走这3个归档日志（未真正删除）
[oracle@ora10g 2014_09_18]$ mv *178* ../
[oracle@ora10g 2014_09_18]$ mv *179* ../
[oracle@ora10g 2014_09_18]$ mv *180* ../
[oracle@ora10g 2014_09_18]$ ll -lrth
total 9.0M
-rw-r----- 1 oracle oinstall 2.4M Sep 18 10:10 o1_mf_1_172_b1nhskdd_.arc
-rw-r----- 1 oracle oinstall 469K Sep 18 10:14 o1_mf_1_173_b1nj0wxp_.arc
-rw-r----- 1 oracle oinstall 6.1M Sep 18 13:49 o1_mf_1_174_b1nwmrpv_.arc
-rw-r----- 1 oracle oinstall 1.0K Sep 18 13:49 o1_mf_1_175_b1nwmzo4_.arc
-rw-r----- 1 oracle oinstall 2.5K Sep 18 13:49 o1_mf_1_176_b1nwn43r_.arc
-rw-r----- 1 oracle oinstall 37K Sep 18 13:51 o1_mf_1_177_b1nwpwxb_.arc
[oracle@ora10g 2014_09_18]$ exit
exit
--启动数据库
SQL> startup
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 88082000 bytes
Database Buffers 192937984 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/ora10g/zlm01.dbf'
--再次创建数据文件datafile 6
SQL> alter database create datafile 6;
Database altered.
--对数据文件datafile 6进行介质恢复
SQL> recover datafile 6;
ORA-00279: change 983806 generated at 09/18/2014 13:47:22 needed for thread 1
ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_174_%u_.arc
ORA-00280: change 983806 for thread 1 is in sequence #174
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
auto
ORA-00279: change 983923 generated at 09/18/2014 13:49:44 needed for thread 1
ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_175_%u_.arc
ORA-00280: change 983923 for thread 1 is in sequence #175
ORA-00278: log file '/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_174_b1nwmrpv_.arc' no longer needed
for this recovery
ORA-00279: change 983927 generated at 09/18/2014 13:49:51 needed for thread 1
ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_176_%u_.arc
ORA-00280: change 983927 for thread 1 is in sequence #176
ORA-00278: log file '/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_175_b1nwmzo4_.arc' no longer needed
for this recovery
ORA-00279: change 983931 generated at 09/18/2014 13:49:56 needed for thread 1
ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_177_%u_.arc
ORA-00280: change 983931 for thread 1 is in sequence #177
ORA-00278: log file '/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_176_b1nwn43r_.arc' no longer needed
for this recovery
ORA-00279: change 983974 generated at 09/18/2014 13:51:24 needed for thread 1
ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_178_%u_.arc
ORA-00280: change 983974 for thread 1 is in sequence #178
ORA-00278: log file '/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_177_b1nwpwxb_.arc' no longer needed
for this recovery
ORA-00308: cannot open archived log '/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_09_18/o1_mf_1_178_b1nx9ry9_.arc'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
当执行auto后，第一个建议的归档位置是174，然后到175、176、177，都没有问题，一直到178，提示文件无法找到，由于178、179、180这3个归档日志被移走了，模拟被删除的情况，数据库无法自动获取到这3个归档日志，也就无法把datafile 6前推到数据库正常关闭前的一致性状态，这个时候想要恢复，就只能通过BBED工具来修改数据文件头信息来实现了，数据库自身以无法完成这个任务，如果这个数据文件对整个数据库而言并不是非常重要，那么可以先offline该文件，然后一致性打开数据库，当然，这个数据文件中的数据也就丢失了