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问题场景
本身问题不复杂，开发的人员在现有的RAC上加了个数据文件，结果路径写错了，文件加到了服务器本地磁盘上。
后来他们自己拍脑门想到了个办法，把数据文件里的表MOVE到其它表空间里去，然后再删除这个文件（啊这。0_0）
结果他们查到了新数据文件里有LOB字段，就尝试把整个LOB字段挪到别的表空间。。。。。。
挪了4-5个小时无果，无奈要上班了，最后只能kill掉MOVE进程，回滚数据了。就这样又用了几天。
直到最近，还是出问题了。。。
趁着这次库出问题，直接停库时候，正好把文件改到ASM存储里。
现场的环境是：
两台AIX7系统下的11G RAC集群。下面简单记录一下操作过程
处理办法
先确认数据库开启了归档模式
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination +ARCH
Oldest online log sequence 58500
Next log sequence to archive 58502
Current log sequence 58502
确认被放到本地的数据文件位置
SQL> select file#,name from v$datafile where file#='56';FILE# NAME
------- -------------------------------------------------------------------------
56 /u01/app/oracle/oracle/product/11.2.0/dbhome_1/dbs/R:ORADATAHTEMRHTBASE01.DBF1 rows selected.
下线数据文件
SQL> alter database datafile 56 offline;Database altered.SQL> select file#,status from v$datafile where file#='56';FILE# STATUS
---------- -------56 RECOVER
登录rman，把文件复制到ASM存储里
bash-3.2$ rman target/Recovery Manager: Release 11.2.0.4.0 - Production on Tue Aug 12 09:57:12 2025Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: EMRDB (DBID=xxxxxx)RMAN> backup as copy datafile 56 format '+DATA/emrdb/datafile/htbase48.ora';Starting backup at 2025-08-12 09:59:58
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=2129 instance=emrdb2 device type=DISK
channel ORA_DISK_1: starting datafile copy
input datafile file number=00056 name=/u01/app/oracle/oracle/product/11.2.0/dbhome_1/dbs/R:ORADATAHTEMRHTBASE01.DBF
output file name=+DATA/emrdb/datafile/htbase48.ora tag=TAG20250812T095958 RECID=1 STAMP=1208944798
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 2025-08-12 09:59:59
亲自到ASM里查看一下文件是否存在，用grid用户操作
$ asmcmd
ASMCMD> cd data
ASMCMD> cd emrdb
ASMCMD> cd datafile
ASMCMD> ls -l
Type Redund Striped Time Sys Name
<多余的我这里隐去了>N htbase46.ora => +DATA/EMRDB/DATAFILE/HTBASE.319.1170750941N htbase47.ora => +DATA/EMRDB/DATAFILE/HTBASE.320.1170751055N htbase48.ora => +DATA/EMRDB/DATAFILE/HTBASE.321.1208944799
切回到Oracle用户，登录数据库，执行修改数据文件命令
$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Tue Aug 12 10:01:19 2025
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing optionsSQL> alter database rename file '/u01/app/oracle/oracle/product/11.2.0/dbhome_1/dbs/R:ORADATAHTEMRHTBASE01.DBF' to '+DATA/emrdb/datafile/htbase48.ora';Database altered.
确认修改结果
SQL> select file#,name,status from v$datafile;FILE# NAME STATUS
------- --------------------------------- -------
56 +DATA/emrdb/datafile/htbase48.ora RECOVER
上线数据文件
SQL> alter database recover datafile 56;
Database altered.SQL> alter database datafile 56 online;
Database altered.
确认数据文件状态
SQL> select file#,name,status from v$datafile;FILE# NAME STATUS
------- --------------------------------- -------
56 +DATA/emrdb/datafile/htbase48.ora ONLINE
收工！
再说一句
如果是12C及以上版本的话，可以在线移动数据文件
lter database move datafile '/u01/app/oracle/product/12.2/db1/dbs/xxxx.dbf' to '+DATA';
最后再刷新下sharepool
alter system check datafiles;
alter system flush shared_pool;