I've now upgraded to Veeam One 9 U1 and I'm creating custom Guest disk space alarms hoping that the duplicate alarms issue is solved.
When creating the alarms I came up to some questions:
The Idea is to create alarms for DB SQL VMs with absolute values conditions for the DATA disks ans relative values for the OS disk.
So I created 2 rules linked with OR.
What is the convention to input the disk name (e.g. for the OS disk) and how to exclude that name from the second rule (DATA disks) keeping the wildcard?