High availability requires the following hardware and system components:
Two homogenous, network systems with similar configurations in terms of resources such as CPU, memory, and so on
High availability system package and the associated hardware
Devices that are accessible to both nodes
A logical volume manager (LVM) to maintain unique device path names across the cluster nodes
Third-party mirroring for media failure protection
See your hardware and operating system documentation for information about installing platform-specific high availability software.
