ORA-15018, ORA-15099 When Creating Diskgroup in ASM
When i am trying to create your first diskgroup on the ASM instance in rac setup. However, it fails when the disk size is above 2 Terabyte in size. And found out that Since you have already installed patch 6453944, you are receiving the error ORA-15099.
As a result of the fix, ORA-15099 will be raised if LUN/disk is larger than 2TB size.
You may also experience INS-20802 if running ASMCA from the installation process.
SOLUTION:
If the disk size is greater than 2TB, please resize the LUN/disk to a size under 2 Terabytes. Then you will be able to create the diskgroup.
It's ok to use disks with exactly 2TB size.
It's ok to use disks with exactly 2TB size.
Note: Even with fix of 6453944 , 2TB is still the limit on 11.2 version on nonExadata set up.
So it is better to have LUN/disk under 2 TB , This is applicable to all linux platforms.
Ref Doc ID 1057333.1