Oracle错误ORA-03113: end-of-file on communication channel处理办法

机器遭遇断电，之后oracle就不能启动了，报错ORA-03113: end-of-file on communication channel （通信通道的文件结尾）

SQL> startup
ORACLE instance started.

Total System Global Area 1252663296 bytes
Fixed Size 2227944 bytes
Variable Size 704643352 bytes
Database Buffers 536870912 bytes
Redo Buffers 8921088 bytes
Database mounted.
ORA-03113: end-of-file on communication channel
Process ID: 8117
Session ID: 191 Serial number: 3
网上分析，可能由于昨晚数据库强制关闭，导致文件状态可能不一致，因为正常关闭数据库会同步校验各文件，使得重新启动的时候文件时间点一致。解决方案如下
启动DB
SQL> conn / as sysdba
Connected to an idle instance.

SQL> startup mount
ORACLE instance started.
直接reset不成功
SQL> select * from v$log;

    GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC
---------- ---------- ---------- ---------- ---------- ---------- ---
STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME
---------------- ------------- --------- ------------ ---------
         1 1 112 52428800 512 1 NO
INACTIVE 3826382 16-JUL-13 3857158 17-JUL-13

         3 1 114 52428800 512 1 NO
CURRENT 3886899 17-JUL-13 2.8147E+14

         2 1 113 52428800 512 1 NO
INACTIVE 3857158 17-JUL-13 3886899 17-JUL-13


SQL> alter database open resetlogs 2;
alter database open resetlogs 2
                              *
ERROR at line 1:
ORA-02288: invalid OPEN mode
恢复数据库
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01139: RESETLOGS option only valid after an incomplete database recovery


SQL> recover database until time '2013-07-05'
Media recovery complete.
SQL> alter database open resetlogs;

Database altered.
成功。