assign each WWN to a host. If Host Explorer agents are running, the HP 3PAR storage system automatically groups WWNs for the host together, assisting with creating the host. The Host Explorer agent runs as a service.

For more information on creating hosts and setting host persona, see the 3PAR Windows Implementation Guide located at: www.hp.com/go/saw.

Creating virtual volumes and adding a LUN presentation

Create the storage (virtual volume) on a primary 3PAR storage system for your application data using the HP 3PAR Management Console GUI or CLI and then export the virtual volumes (thin provisioned or fully provisioned) to the cluster nodes connected to that 3PAR storage system. You must create a replica of the created virtual volume on a back up storage system. The size of the replica should match with the primary virtual volume, but they can have different RAID levels and availability levels (for example, Cage versus Magazine).

For more information, see the 3PAR Management Console User Guide or the 3PAR CLI Administrator’s Manual.

Creating Remote Copy volume groups

Before you can use HP 3PAR Cluster Extension, you must create a Remote Copy volume group that includes your previously created virtual volumes. When you create a Remote Copy volume group, the size of virtual volume(s) on the primary 3PAR storage system should match with the virtual volume(s) on the secondary 3PAR storage system.

For detailed steps on creating a Remote Copy volume group, see the 3PAR Remote Copy User's Guide.

LUN presentation to the secondary virtual volume(s)

Export the virtual volumes to the cluster nodes connected to the secondary 3PAR storage system. When a Remote Copy volume group is started and virtual volumes are in "synced" state, the secondary virtual volumes will be in read-only mode and data replication direction will be from primary volume group to the secondary volume group.

Installing Microsoft Failover Cluster (MSFC) on all nodes

This section describes the steps for installing MSFC on the cluster nodes.

1.Before installing MSFC, create your disk configuration through the Disk Manager. If the disks are not visible, re-scan your disks in the Disk Manager.

NOTE: You may need to shut down all but one server on the source storage system to successfully configure your disks in the Disk Manager. Errors may occur during partitioning and formatting because all servers that you present the same disk to on the local storage will compete for access to the disk. This will not happen after the cluster software is installed and you have formatted or partitioned the disk(s).

In rare cases, certain FC drivers will show disk access errors in the event log (event ID 51) when the disk access is set to read-only. This can be ignored for read-only destination disks and should not occur after HP 3PAR Cluster Extension is installed.

You must reboot the server(s) on the destination storage system or re-scan the disks in the Disk Manager before and after installing the cluster software, and when you add storage in read-only mode on the destination side.

2.Enable Microsoft Failover Cluster feature on all nodes and create the failover cluster using the nodes.

10 Installing HP 3PAR Cluster Extension Software