實驗?zāi)康模涸贏SM存儲環(huán)境下，要刪除一個磁盤組，從而將磁盤組中的數(shù)據(jù)文件移動到另外一個磁盤組中。

查看數(shù)據(jù)文件存放的位置：

SQL> select file#,name from v$datafile;

FILE# NAME
----- ----------------------------------------
    1 +ASM/orcl/datafile/system.271.847398023
    2 +ASM/orcl/datafile/undotbs1.273.84739817
      1

    3 +ASM/orcl/datafile/sysaux.272.847398127
    4 +ASM/orcl/datafile/users.276.847398185
    5 +KEL/orcl/datafile/kel.259.850521765
    6 +ASM/orcl/datafile/kelly.275.847398181

6 rows selected.

在rman中將數(shù)據(jù)文件offline：

RMAN> sql "alter database datafile 5 offline";

using target database control file instead of recovery catalog
sql statement: alter database datafile 5 offline

將數(shù)據(jù)文件進(jìn)行拷貝另外的ASM磁盤組中：

RMAN> run
2> {
3> copy datafile 5 to '+ASM';
4> }

Starting backup at 18-JUN-14
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=143 devtype=DISK
channel ORA_DISK_1: starting datafile copy
input datafile fno=00005 name=+KEL/orcl/datafile/kel.259.850521765
output filename=+ASM/orcl/datafile/kel.274.850522625 tag=TAG20140618T001659 recid=41 stamp=850522627
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:11
Finished backup at 18-JUN-14

Starting Control File and SPFILE Autobackup at 18-JUN-14
piece handle=+ASM/orcl/autobackup/2014_06_18/s_850522631.268.850522635 comment=NONE
Finished Control File and SPFILE Autobackup at 18-JUN-14

在asmcmd中查看新生成的數(shù)據(jù)文件名稱：

ASMCMD> ls
KEL.274.850522625
KELLY.275.847398181
SYSAUX.272.847398127
SYSTEM.271.847398023
UNDOTBS1.273.847398171
USERS.276.847398185

通知控制文件，路徑修改：

RMAN> run       
2> {
3> switch datafile 5 to datafilecopy '+asm/orcl/datafile/KEL.274.850522625';
4> }

datafile 5 switched to datafile copy
input datafile copy recid=41 stamp=850522627 filename=+ASM/orcl/datafile/kel.274.850522625

恢復(fù)數(shù)據(jù)文件：

RMAN> recover datafile 5;

Starting recover at 18-JUN-14
using channel ORA_DISK_1

starting media recovery
media recovery complete, elapsed time: 00:00:03

Finished recover at 18-JUN-14

將數(shù)據(jù)文件online：

RMAN> sql "alter database datafile 5 online";

sql statement: alter database datafile 5 online

再次查看數(shù)據(jù)文件位置：

SQL> select file#,name from v$datafile;

FILE# NAME
----- ----------------------------------------
    1 +ASM/orcl/datafile/system.271.847398023
    2 +ASM/orcl/datafile/undotbs1.273.84739817
      1

    3 +ASM/orcl/datafile/sysaux.272.847398127
    4 +ASM/orcl/datafile/users.276.847398185
    5 +ASM/orcl/datafile/kel.274.850522625
    6 +ASM/orcl/datafile/kelly.275.847398181

6 rows selected.

刪除磁盤組：

SQL> drop diskgroup kel including contents;

Diskgroup dropped.

重新創(chuàng)建磁盤組：

SQL>  create diskgroup KEL external redundancy disk 'ORCL:KEL1','ORCL:KEL2','ORCL:KEL3';

Diskgroup created.

創(chuàng)建磁盤組的時候很奇怪，每次這個路徑需要用不同的方式來進(jìn)行嘗試：以下面的路徑為準(zhǔn)：

SQL> select path from v$asm_disk;

PATH
--------------------------------------------------------------------------------
ORCL:KEL1
ORCL:KEL2
ORCL:KEL3
ORCL:DATA
ORCL:OCR_VOTE

for linux and python

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