HP StorageWorks Disk Array XP operating system configuration guide for Tru64 UNIX XP24000, XP12000, XP10000, v01 (A5951-96066, June 2007)

Clustering and fabric zoning
If you plan to use clustering, install and configure the clustering software on the servers.
Clustering is the organization of multiple servers into groups. Within a cluster, each server is a node.
Multiple clusters compose a multi-cluster environment. The following example shows a multi-cluster
environment with three clusters, each containing two nodes. The nodes share access to the disk array.
In this example, the array is configured so that Host Group 00 is presented only to Cluster 1, Host
Group 01 only to Cluster 2, and Host Group 02 only to Cluster 3. Always configure an array so that
a host group is presented to only 1 cluster.
Figure 2 Multi-cluster environment
Within the Storage Area Network (SAN), the clusters may be homogeneous (all the same operating
system) or they may be heterogeneous (mixed operating systems). How you configure LUN security
and fabric zoning depends on the operating system mix and the SAN configuration.
Fabric zoning and LUN security for multiple operating systems
You can connect multiple clusters of various operating systems to the same switch and fabric using
appropriate zoning and LUN security as follows:
• Heterogeneous operating systems may share an XP array port if you use HP StorageWorks XP
Secure Manager and set the appropriate host group and mode. All others must connect to a
dedicated XP array port.
• Use XP Secure Manager for LUN isolation when multiple hosts connect through a shared array
port. XP Secure Manager provides LUN security by allowing you to restrict which LUNs each host
can access. For detailed procedures, refer to HP StorageWorks XP Secure Manager User's Guide
available at:
http://www.hp.com/support/manuals.
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