ra10g ~]$ cat /u01/app/oracle/oradata/ora10g/zlm01.dbf abc efg hij [oracle@ora10g ~]$
--切换日志3次后继续执行查看 SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> select * from emp; select * from emp * ERROR at line 1: ORA-00376: file 6 cannot be read at this time ORA-01110: data file 6: '/u01/app/oracle/oradata/ora10g/zlm01.dbf'
SQL> ! [oracle@ora10g ~]$ cp /u01/zlm01.dbf /u01/app/oracle/oradata/ora10g/zlm01.dbf [oracle@ora10g ~]$ exit exit
SQL> select * from emp; select * from emp * ERROR at line 1: ORA-00376: file 6 cannot be read at this time ORA-01110: data file 6: '/u01/app/oracle/oradata/ora10g/zlm01.dbf'
把原来热备生成的文件替换掉损坏的6号文件，依然提示无法读取
--把故障文件offline后再online SQL> alter database datafile 6 offline;
Database altered.
SQL> alter database datafile 6 online; alter database datafile 6 online * ERROR at line 1: ORA-01113: file 6 needs media recovery ORA-01110: data file 6: '/u01/app/oracle/oradata/ora10g/zlm01.dbf'
此时，会提示6号文件需要做介质恢复
SQL> col error for a10 SQL> select * from v$recover_file;
FILE# ONLINE ONLINE_ ERROR CHANGE# TIME ---------- ------- ------- ---------- ---------- ---------- 6 OFFLINE OFFLINE 1385889 2014-11-29
可以看到6号文件现在是offline状态，需要做恢复
SQL> select * from v$recovery_log;
THREAD# SEQUENCE# TIME ---------- ---------- ---------- ARCHIVE_NAME ---------------------------------------------------------------------------------------------------------------------------------- 1 58 2014-11-29 /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_58_b7mbppk8_.arc
1 59 2014-11-29 /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_59_b7mbsb96_.arc
1 60 2014-11-29 /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_60_b7mbt18j_.arc
1 61 2014-11-29 /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_61_b7mbtoy8_.arc
1 62 2014-11-29 /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_62_b7mbw693_.arc
1 63 2014-11-29 /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_63_b7mc54hm_.arc
6 rows selected.
v$recovery_log这个视图中查询到的，都是恢复需要用到的归档日志文件
SQL> recover datafile 6; ORA-00279: change 1385889 generated at 11/29/2014 18:46:26 needed for thread 1 ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_58_%u_.arc ORA-00280: change 1385889 for thread 1 is in sequence #58
Specify log: {=suggested | filename | AUTO | CANCEL} auto ORA-00279: change 1387492 generated at 11/29/2014 19:15:34 needed for thread 1 ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_59_%u_.arc ORA-00280: change 1387492 for thread 1 is in sequence #59 ORA-00278: log file '/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_58_b7mbppk8_.arc' no longer needed for this recovery
ORA-00279: change 1387536 generated at 11/29/2014 19:16:58 needed for thread 1 ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_60_%u_.arc ORA-00280: change 1387536 for thread 1 is in sequence #60 ORA-00278: log file '/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_11_29/o1_mf_1_59_b7mbsb96_.arc' no long |