Failover processing in storage server system utilizes policies for
managing fault tolerance (FT) and high availability (HA) configurations.
The approach encapsulates the knowledge of failover recovery between
components within a storage server and between storage server systems.
This knowledge includes information about what components are
participating in a Failover Set, how they are configured for failover,
what is the Fail-Stop policy, and what are the steps to perform when
"failing-over" a component.