In this logical partition example, the following figure shows a cluster consisting of four logical partitions on a single iSeries™ server. All four nodes belong to the same device domain. IASP36 is composed of disk units accessible through IOP Y. IOP Y is on the shared bus so it can be switched between all of the nodes in the cluster: A, B, C, and D. When the IOP is switched, everything that is physically connected to that IOP is also moved to the new primary node.
