ORACLE11g 重装系统后根据dbf恢复数据库

1.安装一个和原系统一致的oracle 环境，主要包括版本、数据名sid、实例名、路径和数据库编码一致

2.修改listener.ora的参数

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = D:\oracle\product\10.1.0\db_1)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = orcl) //如果已经有这个orcl了，这个文件就不用修改
      (ORACLE_HOME = D:\oracle\product\10.1.0\db_1) //这里要根据你的实际路径来
      (SID_NAME = orcl)
    )
  )
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = lypch )(PORT = 1521))
      )
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
      )
    )
  )

3. 修改tnsnames.ora的参数

AMMICLY =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = lypch )(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
      (UR=A) //参数允许只进行管理性的连接，数据库nomount,mount或者restricted时，动态监听显示状态为BLOCKED时，客户端配置UR=A进行连接。
    )
  )
EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

3.SQL>shutdown immediate      停止服务，将新安装的oracle的dbf备份后删除，将原dbf拷贝到新安装的目录下F:\app\toshiba\oradata\orcl

4.原oracle库主目录下的FLASH_RECOVERY_AREA目录全部覆盖到新安装的oracle对应目录下

5. SQL>startup                          再次启动服务

根据看过博客操作的朋友反馈，多实例时有疑问，按照如下地址操作解决了问题

http://blog.sina.com.cn/s/blog_a59b6d310102vat0.html

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