数据库版本：ora10R2

os：linux

SQL> select * From v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production

确认当前日志组状态：

SQL> select * From v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS
---------- ---------- ---------- ---------- ---------- --- ----------------
FIRST_CHANGE# FIRST_TIM
------------- ---------
         1          1         78   52428800          1 NO  INACTIVE
      5609578 21-OCT-13

         4          1         80  104857600          1 NO  INACTIVE
      5609593 21-OCT-13

         3          1         81   52428800          1 NO  CURRENT
      5609595 21-OCT-13

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS
---------- ---------- ---------- ---------- ---------- --- ----------------
FIRST_CHANGE# FIRST_TIM
------------- ---------
         2          1         79   52428800          1 NO  INACTIVE
      5609581 21-OCT-13

---手工删除相应的redolog

rm -rf /oracle/oradata/lixora/redo01.log

SQL> alter database clear logfile group 1;
alter database clear logfile group 1
*
ERROR at line 1:
ORA-00350: log 1 of instance lixora (thread 1) needs to be archived
ORA-00312: online log 1 thread 1: '/oracle/oradata/lixora/redo01.log'

SQL> alter database clear unarchived logfile group 1;

Database altered.

-----打开数据库

SQL> alter database open;

Database altered.

-----再次确认redolog状态

SQL> select * From v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS
---------- ---------- ---------- ---------- ---------- --- ----------------
FIRST_CHANGE# FIRST_TIM
------------- ---------
         1          1         82   52428800          1 NO  CURRENT
      5629603 21-OCT-13

         2          1         79   52428800          1 YES INACTIVE
      5609581 21-OCT-13

      &n