[Oracle datagard]从库恢复之 ORA-16032: parameter ORA-07286:问题

　　机房断电，所以oracle的datagard的从库需要重新启动：
　　

　　1 登录sqlplus启动，出现报错信息：
　　SQL> STARTUP MOUNT;
ORA-16032: parameter LOG_ARCHIVE_DEST_3 destination string cannot be translated
ORA-07286: sksagdi: cannot obtain device information.
Linux-x86_64 Error: 2: No such file or directory
　　

　　2 去查看找下LOG_ARCHIVE_DEST_3的具体路径
[iyunv@localhost ~]# su - oracle
[oracle@localhost ~]$ echo $ORACLE_HOME
/oracle/app/oracle/product/11.2.0/dbhome_1
[oracle@localhost ~]$ cd /oracle/app/oracle/product/11.2.0/dbhome_1
[oracle@localhost dbhome_1]$
[oracle@localhost dbhome_1]$ cd dbs
[oracle@localhost dbs]$ ll
总用量 13160
-rw-rw----. 1 oracle dba     1544 5月  4 14:49 hc_powerdes.dat
-rw-r--r--. 1 oracle dba     2851 5月 15 2009 init.ora
-rw-r-----. 1 oracle dba      24 8月 27 2013 lkPDDGUNQ
-rw-r-----. 1 oracle oinstall   1536 8月 27 2013 orapwpowerdes
-rw-r-----. 1 oracle dba   13451264 4月 27 05:00 snapcf_powerdes.f
　　-rw-r-----. 1 oracle dba     5632 8月 30 2013 spfilepowerdes.ora
　　

　　3 # 找到了路径
[oracle@localhost dbs]$ strings spfile*.ora|grep dest_3
*.log_archive_dest_3='LOCATION=/data/oracle/oradgdata/standby_archive VALID_FOR=(STANDBY_LOGFILES,STANDBY_ROLE) DB_UNIQUE_NAME=pddgunq'



4 check路径，排查问题
[iyunv@localhost data]# ls -l /data/oracle/oradgdata/standby_archive
ls: 无法访问/data/oracle/oradgdata/standby_archive: 没有那个文件或目录

[oracle@localhost dbs]$ mkdir -p /data/oracle/oradgdata/standby_archive
mkdir: 无法创建目录"/data/oracle": 只读文件系统

[oracle@localhost dbhome_1]$ df -h
文件系统   容量 已用 可用 已用%% 挂载点
/dev/mapper/VolGroup-lv_root
           50G  28G  19G 60% /
tmpfs         8.9G 3.0G 5.9G 34% /dev/shm
/dev/sda2       485M  76M 384M 17% /boot
/dev/sda1       200M 260K 200M  1% /boot/efi
/dev/mapper/VolGroup-lv_home
           76G  37G  36G 51% /home
/dev/sdb1      1008G 221G 737G 24% /data

　　

　　5 解决问题

/data已经存在了，只是无法使用，google，看到2种解决方案
mkdir: 无法创建目录‘XX’: 只读文件系统
touch: 无法触碰 “XX”: 只读文件系统,
建立文件和目录都提示错误，
   解决方法如下:
           第一，重起服务器
            我的这样就好了。
         第二，
       如果第一不好使的话，
             就得进行修复硬盘了，
          开机进入修复模式，
          看你是在哪个目录下能建立文件，然后用 fsck.ext3 -y ..挂载分区...进行修复就ok了。
参考： http://hi.baidu.com/lijunyi0198/item/2558f8c613618f61f6c95d04
reboot试试看

　　

　　6 再次登录sqlplus start从库

SQL>  STARTUP MOUNT;
ORACLE instance started.

Total System Global Area 5344731136 bytes
Fixed Size    2213136 bytes
Variable Size 3489663728 bytes
Database Buffers 1811939328 bytes
Redo Buffers   40914944 bytes
Database mounted.

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;

Database altered.

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE;
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE
*
ERROR at line 1:
ORA-01153: an incompatible media recovery is active
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-10456: cannot open standby database; media recovery session may be in
progress



# 有报错信息，看到这里，需要暂时中止media recovery了。

SQL> recover managed standby database cancel;
Media recovery complete.

7 试图再自动 recover下，不过还是fail，只要再次中止
　　

SQL> recover automatic standby database ;
ORA-00279: change 10386441904 generated at 04/18/2014 17:56:46 needed for
thread 1
ORA-00289: suggestion :
/data/oracle/oradgdata/standby_archive/1_7368_821708334.dbf
ORA-00280: change 10386441904 for thread 1 is in sequence #7368
ORA-00278: log file
'/data/oracle/oradgdata/standby_archive/1_7368_821708334.dbf' no longer needed
for this recovery
ORA-00308: cannot open archived log
'/data/oracle/oradgdata/standby_archive/1_7368_821708334.dbf'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
ORA-00308: cannot open archived log
'/data/oracle/oradgdata/standby_archive/1_7368_821708334.dbf'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
SQL> RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
Media recovery complete.



　　
　　8，查看下当前datagard的状态

SQL> SELECT MESSAGE FROM V$DATAGUARD_STATUS;

MESSAGE
--------------------------------------------------------------------------------
ARC0: Archival started
ARC1: Archival started
ARC2: Archival started
ARC3: Archival started
ARC4: Archival started
ARC5: Archival started
ARC6: Archival started
ARC7: Archival started
ARC8: Archival started
ARC9: Archival started
ARCa: Archival started

MESSAGE
--------------------------------------------------------------------------------
ARCb: Archival started
ARCc: Archival started
ARCd: Archival started
ARCe: Archival started
ARCf: Archival started
ARCg: Archival started
ARCh: Archival started
ARCi: Archival started
ARC1: Becoming the 'no FAL' ARCH
ARC2: Becoming the heartbeat ARCH
ARCj: Archival started

MESSAGE
--------------------------------------------------------------------------------
Media Recovery Start: Managed Standby Recovery
Managed Standby Recovery not using Real Time Apply
Media Recovery Waiting for thread 1 sequence 7368
Fetching gap sequence in thread 1, gap sequence 7368-7392
FAL[client]: Failed to request gap sequence
GAP - thread 1 sequence 7368-7392
DBID 3391761643 branch 821708334
FAL[client]: All defined FAL servers have been attempted.
Attempt to start background Managed Standby Recovery process
MRP0: Background Managed Standby Recovery process started
Managed Standby Recovery not using Real Time Apply

MESSAGE
--------------------------------------------------------------------------------
Media Recovery Waiting for thread 1 sequence 7368
Fetching gap sequence in thread 1, gap sequence 7368-7392
FAL[client]: Failed to request gap sequence
GAP - thread 1 sequence 7368-7392
DBID 3391761643 branch 821708334
FAL[client]: All defined FAL servers have been attempted.
MRP0: Background Media Recovery cancelled with status 16037
MRP0: Background Media Recovery process shutdown
Managed Standby Recovery Canceled
Managed Standby Recovery not using Real Time Apply
Attempt to start background Managed Standby Recovery process

MESSAGE
--------------------------------------------------------------------------------
MRP0: Background Managed Standby Recovery process started
Managed Standby Recovery not using Real Time Apply
Media Recovery Waiting for thread 1 sequence 7368
Fetching gap sequence in thread 1, gap sequence 7368-7392
FAL[client]: Failed to request gap sequence
GAP - thread 1 sequence 7368-7392
DBID 3391761643 branch 821708334
FAL[client]: All defined FAL servers have been attempted.

52 rows selected.





9 再试试直接修改状态到open吧
# 打开standary从库
SQL> alter database open;
Database altered.
SQL>  select open_mode from v$database;
OPEN_MODE
--------------------
READ ONLY
# 将备库置于自动恢复状态
SQL> recover managed standby database disconnect from session;
Media recovery complete.




10 # check，检查主从的归档日志情况
# 主库状态:
SQL> archive log list;                                                                                                                                                                        
Database log mode       Archive Mode
Automatic archival       Enabled
Archive destination       /oracle/app/oracle/flash_recovery_area/archivelog
Oldest online log sequence     7777
Next log sequence to archive   7779
Current log sequence       7779
SQL>   

#从库状态：
SQL>  archive log list;                                                                                                                                                                        
Database log mode       Archive Mode
Automatic archival       Enabled
Archive destination       /data/oracle/oradgdata/standby_archive
Oldest online log sequence     7778
Next log sequence to archive   0
Current log sequence       7779
SQL>


最后问猫猫，怎么样才能彻底check下datagard主从数据一致，结果被猫猫美女一顿狂批，多看点datagard官方文档，别老问她，得自己去专研去总结。
哈哈，看来是得抽功夫去恶补下oracle datagard了。