11g 刪除磁盤組步驟

安裝客戶核心生產數據庫，磁盤組名不對，需要刪除，重新創建。

刪除磁盤組步驟如下：

su - grid
sqlplus / as sysasm

SQL> select group_number, name from v$asm_diskgroup;

GROUP_NUMBER NAME
------------ --------------------------------------------------
           1 DATADG

SQL> col path for a40
SQL> col name for a40
SQL> set lines 120
SQL> select path, name from v$asm_disk where group_number=1;

PATH                                     NAME
---------------------------------------- ----------------------------------------
/dev/rhdiskpower0                        DATADG_0000
/dev/rhdiskpower1                        DATADG_0001
/dev/rhdiskpower2                        DATADG_0002
/dev/rhdiskpower3                        DATADG_0003
/dev/rhdiskpower4                        DATADG_0004

SQL> 

SQL>  alter diskgroup datadg dismount force;

Diskgroup altered.

SQL> drop diskgroup datadg force including contents;

Diskgroup dropped.

##原有磁盤組名叫DATADG,現在需要改為DATA
# su - grid
$ asmcmd -p
ASMCMD [+] > lsdg
State    Type    Rebal  Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name
MOUNTED  EXTERN  N         512   4096  1048576   1024000  1023928                0         1023928              0             N  DATADG/   
ASMCMD [+] > exit

###刪除后發現磁盤組確實不見了哈
$ 
$ asmcmd -p
ASMCMD [+] > lsdg
ASMCMD [+] > exit
$ 
$