ORACLE11g 实例启动报错 ORA-00205: error in identifying control file, check alert log for more info

ORACLE11g 实例启动报错：
SQL> conn / as sysdba
Connected to an idle instance.
SQL> startup nomount;
ORACLE instance started.


Total System Global Area 1607008256 bytes
Fixed Size                  1364928 bytes
Variable Size             922750016 bytes
Database Buffers          671088640 bytes
Redo Buffers               11804672 bytes
SQL> alter database mount;
alter database mount
*
ERROR at line 1:
ORA-00205: error in identifying control file, check alert log for more info
SQL> 




查看alert日志：
SQL> show parameter dump


NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
background_core_dump                 string      partial
background_dump_dest                 string      /oracle11/app/oracle/diag/rdbm
                                                 s/db11/db11/trace
core_dump_dest                       string      /oracle11/app/oracle/diag/rdbm
                                                 s/db11/db11/cdump
max_dump_file_size                   string      unlimited
shadow_core_dump                     string      partial
user_dump_dest                       string      /oracle11/app/oracle/diag/rdbm
                                                 s/db11/db11/trace
SQL> 


查看alet日志信息:


ORA-27041: unable to open file
Linux Error: 13: Permission denied
Additional information: 9
SUCCESS: diskgroup DATA was dismounted
ERROR: diskgroup DATA was not mounted
ORA-15025: could not open disk "/dev/raw/raw2"
ORA-27041: unable to open file
Linux Error: 13: Permission denied
Additional information: 9
SUCCESS: diskgroup DATA was dismounted
ERROR: diskgroup DATA was not mounted
ORA-15025: could not open disk "/dev/raw/raw2"
ORA-27041: unable to open file
Linux Error: 13: Permission denied
Additional information: 9
SUCCESS: diskgroup DATA was dismounted
ERROR: diskgroup DATA was not mounted




但是检查ASM实例都是启动了的,状态是ok的,ASM实例启动正常,但是挂载的磁盘ORACLE用户无法访问,看下/dev/raw/raw2的权限:
[root@test raw]# ls -al
total 0
drwxr-xr-x  2 root root         80 Mar  9 18:22 .
drwxr-xr-x 12 root root       3820 Mar  9 18:22 ..
crw-------  1 grid oinstall 162, 1 Mar 13 16:23 raw1
crw-------  1 grid oinstall 162, 2 Mar 13 16:23 raw2
[root@test raw]#
权限明显不足,添加oracle用户的访问执行权限,我这就直接chmod 777 *了
[root@test raw]# chmod 777 *
[root@test raw]# ls -al
total 0
drwxr-xr-x  2 root root         80 Mar  9 18:22 .
drwxr-xr-x 12 root root       3820 Mar  9 18:22 ..
crwxrwxrwx  1 grid oinstall 162, 1 Mar 13 16:23 raw1
crwxrwxrwx  1 grid oinstall 162, 2 Mar 13 16:23 raw2
[root@test raw]


然后去打开数据库:
SQL> alter database mount;


Database altered.


SQL> 
SQL> 
SQL> alter database open;


Database altered.


SQL>


解决了...