How to add a new disk in ASM

How to add a new disk in ASM Filesystem:-


/dev/sdi1            259610368    538324 259072044   1% /flash4
/etc/init.d/oracleasm createdisk ASMDISK02

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/etc/init.d/oracleasm createdisk ASMDISK02 /dev/sdi1

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ALTER DISKGROUP DBGROUP1 ADD DISK 'ORCL:ASMDISK02';

alter system set asm_diskstring='/dev/oracleasm/disks/*' scope=both;

ALTER DISKGROUP DBGROUP1 ADD DISK 'ORCL:ASMDISK02' NAME  ASMDISK02  REBALANCE POWER 11;

ALTER DISKGROUP DBGROUP1 DROP DISK 'ORCL:ASMDISK02';

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select NAME, PATH, MOUNT_STATUS, HEADER_STATUS, MODE_STATUS, TOTAL_MB, FREE_MB
from v$asm_disk;


2. Add new ASM disks to the diskgroup:

alter diskgroup ORADB_DATA01_DG add disk 'ORCL:H_1253_1521';
alter diskgroup ORADB_DATA01_DG add disk 'ORCL:H_1253_1522';
alter diskgroup ORADB_DATA01_DG add disk 'ORCL:H_1253_1523';

alter diskgroup ORADB_DATA01_DG REBALANCE POWER 10; or
alter system set asm_power_limit=10 scope=memory;

-- Check the rebalance operation
select * from v$asm_operation;


Time taken to rebalance the diskgroup: app. 90 min.


3. Identify the disks to drop from the diskgroup:

set linesize 200;
col path format a20;

select NAME, PATH, MOUNT_STATUS, HEADER_STATUS, MODE_STATUS, TOTAL_MB, FREE_MB
from v$asm_disk;

ALTER DISKGROUP ORADB_DATA01_DG DROP DISK B_1530_1091;
ALTER DISKGROUP ORADB_DATA01_DG DROP DISK C_1530_1090;
ALTER DISKGROUP ORADB_DATA01_DG DROP DISK D_1530_1081;

alter diskgroup ORADB_DATA01_DG REBALANCE POWER 10; or
alter system set asm_power_limit=10 scope=memory;

-- Check the rebalance operation
select * from v$asm_operation;


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/etc/init.d/oracleasm createdisk ORA_G1D6 /dev/sdn1

ALTER DISKGROUP DBGROUP1 ADD DISK 'ORCL:ORA_G1D5';
ALTER DISKGROUP DBGROUP1 ADD DISK 'ORCL:ORA_G1D6';
ALTER DISKGROUP DBGROUP1 ADD DISK 'ORCL:ORA_G1D7';
ALTER DISKGROUP DBGROUP1 ADD DISK 'ORCL:ORA_G1D8';

alter diskgroup DBGROUP1 REBALANCE POWER 10;

ALTER DISKGROUP DBGROUP1 DROP DISK 'ORCL:ASMDISK02';

ORA_G1D1
ORA_G1D2
ORA_G1D3
ORA_G1D4
ORA_G1D5
ORA_G1D6
ORA_G1D7
ORA_G1D8