Add a disk to an Oracle ASM disk on Linux

The following describes how to add a disk to an Oracle ASM disk on the Linux platform.

1. Operating System settings

1. Map the storage disk to the server, restart and scan the disk.

/Opt/D */bin/dlnkmgr view-lu

2. After scanning a new disk (both nodes must be scanned and the drive letter must be consistent), create a partition on the new disk (execute on any node)

Fdisk/dev/sddlmax

Fdisk/dev/sddlmay

View partitions

Fdisk-l/dev/sddlmax

Fdisk-l/dev/sddlmay

Run the following command on another node:

Partprobe

View partitions

Fdisk-l/dev/sddlmax

Fdisk-l/dev/sddlmay

3. Create a vol Disk

Run the following command on a node:

/Etc/init. d/oracleasm createdisk VOLDB7/dev/sddlmax1

/Etc/init. d/oracleasm createdisk VOLDB8/dev/sddlmay1

Ls-l/dev/oracleasm/disks

View

/Etc/init. d/oracleasm listdisks

Run the following command on another node:

/Etc/init. d/oracleasm scandisks

Then View:

/Etc/init. d/oracleasm listdisks

Ii. Database settings

Export ORACLE_SID = + ASM1

Sqlplus "/as sysdba"

Show parameter pfile. Check whether the ASM_DISKSTRING parameter is set.

Show parameter asm_power

Alter system set asm_power_limit = 5;

Alter diskgroup DBDATA add disk 'orcl: voldb7 ';

Alter diskgroup DBDATA add disk 'orcl: voldb8 ';

Alter diskgroup dbdata rebalance power 5; Increase the balance rate

Select operation, est_minutes from v $ asm_operation; view the time required for balancing

Select TOTAL_MB, FREE_MB, path from v $ asm_disk_stat where GROUP_NUMBER = 1 order by 3; view the current disk space usage

Alter diskgroup dbdata rebalance power 1; restore to balance rate 1