#查看服务器上总共有多少个asmdisk

[grid@rkdb1]$ asmcmd lsdsk --discovery

Path

/dev/oracleasm/disks/OCPDATA1

/dev/oracleasm/disks/OCPDATA2

#查看已经在asmdiskgroup中的asmdisk

[grid@rkdb1]$ asmcmd lsdsk

Path

/dev/oracleasm/disks/OCPDATA1

#查看没有在asmdiskgroup的asmdisk(即没有被使用的asmdisk)

[grid@rkdb1]$ asmcmd lsdsk --candidate

Path

/dev/oracleasm/disks/OCPDATA2

#查看asmdiskgroup的信息(磁盘组的可用空间等)

[grid@rkdb1]$ asmcmd lsdg

#将未用磁盘添加到磁盘组（扩容asm）

su - grid

[grid@rkdb1]$ sqlplus / as sysasm

set linesize 300

set pagesize 100

col name format a20

col path format a40

col state format a10

>select group_number,name,path,state from v$asm_disk;

>alter diskgroup RES_DATA add disk '/dev/oracleasm/disks/OCPDATA2';