About shared storage

Storage is a key resource of most applications services, and therefore most service groups. You can start a managed application on a system that has access to its associated data files. Therefore, a service group can only run on all systems in the cluster if the storage is shared across all systems. In many configurations, a storage area network (SAN) provides this requirement.

See Cluster topologies and storage configurations.

You can use I/O fencing technology for data protection. I/O fencing blocks access to shared storage from any system that is not a current and verified member of the cluster.

See About the I/O fencing module.

See About the I/O fencing algorithm.