实验目标：实现磁盘组中的数据文件批量复制到本地磁盘.
实际操作如下：
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
+DATA/ORCLCDB/DATAFILE/system.257.1082993319
+DATA/ORCLCDB/DATAFILE/sysaux.258.1082993363
+DATA/ORCLCDB/DATAFILE/undotbs1.259.1082993389
+DATA/ORCLCDB/86B637B62FE07A65E053F706E80A27CA/DATAFILE/system.270.1082993933
+DATA/ORCLCDB/86B637B62FE07A65E053F706E80A27CA/DATAFILE/sysaux.271.1082993933
+DATA/ORCLCDB/DATAFILE/users.260.1082993391
+DATA/ORCLCDB/86B637B62FE07A65E053F706E80A27CA/DATAFILE/undotbs1.272.1082993933
+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/system.276.1082994661
+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/sysaux.277.1082994661
+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/undotbs1.275.1082994661
+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/users.279.1082994667
NAME
--------------------------------------------------------------------------------
/home/oracle/tsp_idx01.dbf
/home/oracle/tsp_item01.dbf
+DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/tsp_test01.dbf
+DATA/ORCLCDB/DATAFILE/tsp_treate.dbf
+DATA/ORCLCDB/DATAFILE/apnurrec.dbf
+DATA/ORCLCDB/DATAFILE/apnurrec01.dbf
+DATA/ORCLCDB/DATAFILE/apnurrec02.dbf
+DATA/ORCLCDB/DATAFILE/apnurrec03.dbf
+DATA/ORCLCDB/DATAFILE/apnurrec04.dbf
20 rows selected.
如下单个文件复制.
SQL> cp +DATA/ORCLCDB/DATAFILE/system.257.1082993319 /home/oracle/system.257.1082993319
如果数据文件很多，就需要批量生成复制语句，既提高效率同时也减少误操作.
使用如下语句生成：
SQL> select 'cp ' ||name || ' /home/oracle/' || substr(name,instr(name,'/',-1)+1)
from v$datafile
'CP'||NAME||'/HOME/ORACLE/'||SUBSTR(NAME,INSTR(NAME,'/',-1)+1)
------------------------------------------------------------------------------------------------------------------------------------
cp +DATA/ORCLCDB/DATAFILE/system.257.1082993319 /home/oracle/system.257.1082993319
cp +DATA/ORCLCDB/DATAFILE/sysaux.258.1082993363 /home/oracle/sysaux.258.1082993363
cp +DATA/ORCLCDB/DATAFILE/undotbs1.259.1082993389 /home/oracle/undotbs1.259.1082993389
cp +DATA/ORCLCDB/86B637B62FE07A65E053F706E80A27CA/DATAFILE/system.270.1082993933 /home/oracle/system.270.1082993933
cp +DATA/ORCLCDB/86B637B62FE07A65E053F706E80A27CA/DATAFILE/sysaux.271.1082993933 /home/oracle/sysaux.271.1082993933
cp +DATA/ORCLCDB/DATAFILE/users.260.1082993391 /home/oracle/users.260.1082993391
cp +DATA/ORCLCDB/86B637B62FE07A65E053F706E80A27CA/DATAFILE/undotbs1.272.1082993933 /home/oracle/undotbs1.272.1082993933
cp +DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/system.276.1082994661 /home/oracle/system.276.1082994661
cp +DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/sysaux.277.1082994661 /home/oracle/sysaux.277.1082994661
cp +DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/undotbs1.275.1082994661 /home/oracle/undotbs1.275.1082994661
cp +DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/users.279.1082994667 /home/oracle/users.279.1082994667
'CP'||NAME||'/HOME/ORACLE/'||SUBSTR(NAME,INSTR(NAME,'/',-1)+1)
------------------------------------------------------------------------------------------------------------------------------------
cp /home/oracle/tsp_idx01.dbf /home/oracle/tsp_idx01.dbf
cp /home/oracle/tsp_item01.dbf /home/oracle/tsp_item01.dbf
cp +DATA/ORCLCDB/CBB47E352F7AAEA7E0537885A8C03007/DATAFILE/tsp_test01.dbf /home/oracle/tsp_test01.dbf
cp +DATA/ORCLCDB/DATAFILE/tsp_treate.dbf /home/oracle/tsp_treate.dbf
cp +DATA/ORCLCDB/DATAFILE/apnurrec.dbf /home/oracle/apnurrec.dbf
cp +DATA/ORCLCDB/DATAFILE/apnurrec01.dbf /home/oracle/apnurrec01.dbf
cp +DATA/ORCLCDB/DATAFILE/apnurrec02.dbf /home/oracle/apnurrec02.dbf
cp +DATA/ORCLCDB/DATAFILE/apnurrec03.dbf /home/oracle/apnurrec03.dbf
cp +DATA/ORCLCDB/DATAFILE/apnurrec04.dbf /home/oracle/apnurrec04.dbf
上述复制命令的成功执行，需要将oracle的home目录的组权限添加上“wx”权限，
组权限只有“x”时，复制报错
ASMCMD> cp +DATA/ORCLCDB/DATAFILE/tsp_treate.dbf /home/oracle/tsp_treate.dbf
ASMCMD-9463: operation failed due to lack of write permissions
用户权限：
[root@dbserver home]# pwd
/home
[root@dbserver home]# chmod g+x oracle
[root@dbserver home]# ll
total 8
drwx------. 7 grid oinstall 221 Jul 4 10:15 grid
drwx--x---. 22 oracle oinstall 4096 Jul 4 10:16 oracle
组权限只有“w”时，复制报错
ASMCMD> cp +DATA/ORCLCDB/DATAFILE/apnurrec.dbf /home/oracle/apnurrec.dbf
copying +DATA/ORCLCDB/DATAFILE/apnurrec.dbf -> /home/oracle/apnurrec.dbf
ASMCMD-8016: copy source '+DATA/ORCLCDB/DATAFILE/apnurrec.dbf' and target '/home/oracle/apnurrec.dbf' failed
ORA-19505: failed to identify file "/home/oracle/apnurrec.dbf"
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 13: Permission denied
Additional information: 9
ORA-15120: ASM file name '/home/oracle/apnurrec.dbf' does not begin with the ASM prefix character
ORA-06512: at "SYS.X$DBMS_DISKGROUP", line 617
ORA-06512: at line 3 (DBD ERROR: OCIStmtExecute)
用户权限：
[root@dbserver home]# pwd
/home
[root@dbserver home]# ll
total 8
drwx------. 7 grid oinstall 221 Jul 4 10:15 grid
drwx-w----. 22 oracle oinstall 4096 Jul 6 13:03 oracle
组权限同时拥有“wx”时，复制无异常
ASMCMD> cp +DATA/ORCLCDB/DATAFILE/apnurrec.dbf /home/oracle/apnurrec.dbf
copying +DATA/ORCLCDB/DATAFILE/apnurrec.dbf -> /home/oracle/apnurrec.dbf
用户权限：
[root@dbserver home]# pwd
/home
[root@dbserver home]# ll
total 8
drwx------. 7 grid oinstall 221 Jul 4 10:15 grid
drwx-wx---. 22 oracle oinstall 4096 Jul 6 13:03 oracle
