Any iSeries™ model that is capable of running i5/OS™ V4R4M0 or later is compatible for using clustering.
In addition, you should provide protection from a power loss through an external uninterruptible power supply or equivalent. Otherwise, a sudden power loss on a cluster node can result in a cluster partition state rather than a failover.
Clustering uses Internet Protocol (IP) multicast capabilities. Multicast does not map well to all types of physical media. For more information about multicast restrictions that may apply to your particular hardware, see the TCP/IP Setup.
If you plan to use independent disk pools in your cluster, refer to the Hardware requirements for independent disk pools topic. You can also protect your disks with mirrored protection or device parity protection. Using these solutions on your primary system prevents a failover from occurring should a protected disk fail. It also is a good idea to have these solutions on your backup system in case a failover should occur. See Disk protection for details.
For details on other requirements that are necessary
before configuring clusters, see Cluster configuration checklist.