在grid用户下（安装ASM的时候，设置的磁盘组名称和重装前一样的）
使用asmca无法打开图形界面，报错如下：


sqlplus / as sysasm登陆
使用以下命令查询可用的/dev/设备
SQL> select group_number,disk_number,header_status,mode_status,state,total_mb,name,failgroup,path from  v$asm_disk;
GROUP_NUMBER DISK_NUMBER MODE_ST HEADER_STATU MODE_ST STATE TOTAL_MB    FREE_MB NAME    PATH
------------ ----------- ------- ------------ ------- -------- ---------- ---------- ------------------------------ ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  0       0 ONLINE  CANDIDATE    ONLINE  NORMAL 0   0    /dev/asm_vdd
  0       1 ONLINE  CANDIDATE    ONLINE  NORMAL 0   0    /dev/asm_vdj
  0       2 ONLINE  CANDIDATE    ONLINE  NORMAL 0   0    /dev/asm_vdg
  0       7 ONLINE  CANDIDATE    ONLINE  NORMAL 0   0    /dev/asm_vdb
  0       4 ONLINE  CANDIDATE    ONLINE  NORMAL 0   0    /dev/asm_vdf
  0       5 ONLINE  CANDIDATE    ONLINE  NORMAL 0   0    /dev/asm_vde
  0       6 ONLINE  CANDIDATE    ONLINE  NORMAL 0   0    /dev/asm_vdh
  0       3 ONLINE  CANDIDATE    ONLINE  NORMAL 0   0    /dev/asm_vdi


8 rows selected.
使用以下命令查询磁盘组是空的：
SQL> select name,state from v$asm_diskgroup;
no rows selected
--添加ASM磁盘组
SQL> Create diskgroup  DATA  external  redundancy  disk '/dev/asm_vdd';
Diskgroup created.
--再次查询就有磁盘组了
SQL> select name,state from v$asm_diskgroup;
NAME       STATE
------------------------------ -----------
DATA       MOUNTED
将其他磁盘加入磁盘组
SQL> alter diskgroup +data add disk '/dev/asm_vde';