
2 Adding servers to the HP EVA Cluster
The EVA Cluster begins with a starter kit of cluster components, virtualization software (Volume
Manager, Business Copy, Continuous Access and Thin Provisioning), two EVAs (either EVA6400s or
EVA8400s), a pair of Fibre Channel switches, an Ethernet switch, and management servers. The EVA
Cluster is designed to be factory configured and tested so that the EVA Cluster can be easily installed
into an existing SAN.
The EVA Cluster can easily be expanded beyond two EVAs with the addition of more EVAs or other
arrays that can be added to the EVA Cluster in the field. The EVA Cluster Starter Kit and total solution
is configured to allow easy expansion with up to six arrays.
Zoning
Hosts and storage can be zoned to different DPM “quads” to distribute the load between available
DPM ports. To simplify the validation of the configuration, it is desirable to have the same hosts or
storage zoned to the same quad on each DPM. For example, hosts A and B could be zoned to quad
1 of both DPMs and hosts C and D zoned to quad 2 of both DPMs. This is called a symmetrical
configuration.
Adding new servers
This section describes special requirements when installing or upgrading host servers. When setting
up a new server, be sure to balance the workload on the DPMs by using the primary/secondary
properties of the virtual disk
Upgrading the AIX operating system
The following are two ways to upgrade the AIX operating system technology level (TL). Some of the
commands below use hdisk3 as the name of a disk, which may be different on your system.
AIX on local drive or booting from a SAN other than with the HP SVSP
NOTE:
Back up all data before attempting these upgrades.
1. Before upgrading to a new TL/ML, remove SVSP disks. For example, use rmdev –dRl hdisk3.
To identify an SVSP disk, check the properties of the disk and look for “node_name” property
which should show the WWN of the SVSP array. For example:
# lsattr -El hdisk3|grep node_name
node_name 0x50011fe12a56ac00 FC Node Name False
2. Make sure that the host does not see the SVSP volumes (separate the host in the SVSP zoning).
Enterprise Virtual Array Cluster Administrator Guide 21
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