Today I faced the issue that a new ASM Disk Group created in instance +ASM1 is not getting automatically mounted in instance +ASM2.
The first step was to check DB dependencies:
You can see that only dependent Disk Groups are ‘DATA’.
Let us add ‘FRA’ also as dependent Disk Group:
The next step is to add the Disk Groups to ASM_DISKGROUPS parameter:
After restarting +ASM2 instance we can see that FRA Disk Group is mounted automatically: