Adding/Removing disk to ASM Diskgroup via OEM

Adding/Removing disk to ASM Diskgroup via OEM

To add a disk to an ASM disk group, follow these steps:

1.       In Cloud Control, Search the ASM target and go to ASM Home page, from the ASM menu click the Disk Groups as highlighted below.

2.  On Next Window you can see all the disk groups, then you can Click the diskgroup where you need the space. (ex : click P---N_DBF01)

3.       On Next Window we can see the all disk which is belongs to the Diskgroup, to add the disk, click Add button in the righ-side corner.

4.       Once we click the Add on Next Window we can see the all Candidate disk which is available to add, in that select the disk which we need to add, if needed we can select the multiple disk also and select rebalance value depend on the environment.

5.       On Same Window we can see the show SQL button to see the SQL command which is going to execute if we want to check and then come back and Click Ok to add disk.

6.       On Next Window we will get the update message that the disk added successfully.

7.       Then we can check the Disk group Members used % status, if all the disk are in the same size then the Rebalance operation is completed successfully. On upcoming screen shots we can see the rebalance operation completion status.

8.       Below is the latest disk group usage after adding the disk to the diskgroup.

Removing disk from ASM Diskgroup via OEM

To remove a disk from an ASM disk group, follow these steps:

1.       In Cloud Control, Search the ASM target and go to ASM Home page, from the ASM menu click the Disk Groups, from that page click the disk group which u need to alter, the below page will open , there you can find the list of disk added to Disk group.

2.       Now you can select the disk which you need to remove and click the Remove button

3.       On Next Window you can give the rebalance power limit and click Yes to Remove the Disk from Disk Group

4.       Crosscheck the Query with show SQL Option.

5.  Now the Disk is successfully removed from the Disk Group.

6.       Now the Disk available in the disk group after dropping the disk

7.       The Removed Disk went to Former disk state as highlighted below.

8.       And Crosscheck the Disk group size in sqlplus level also.