Voting Files stored in ASM – How many disks per disk group do I need?
The Voting Disks for a particular cluster can only reside in one disk group. In case “external redundancy” has been chosen for the disk group that holds the database data, it is assumed that an external mechanism (e.g. RAID) is used to protect the database data against disk failures. The same mechanism can therefore be used to protect the Oracle Clusterware files, including the Voting Disk (only one Voting Disk is created in an “external redundancy disk group”). Under certain circumstances, one may want to create a dedicated disk group for the Oracle Clusterware files (OCR and Voting Disks), separated from the existing database data containing disk groups. This should not be required, but can be configured. Potential scenarios include, but are not limited to: • A 1:1 relationship between disk groups and databases is preferred and disk groups are generally not shared amongst databases. • The backup and recovery for individual databases (more than one in the cluster) is based on a snapsh
