HP Storage Mirroring V4.5 Software - Manual (Page 42)

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Protecting an
Exchange Cluster with
a Like-Named Cluster
This section describes the process used to configure protection for an Exchange cluster with a
like-named (also known as a standby) cluster.
When you protect a cluster with a like-named cluster, the Application Manager moves the EVS
(Exchange virtual server) location from the source cluster to the target cluster. By moving the EVS,
the process of moving users and public folders from one server to another is not needed because they
will continue to use the same mail store on the target as they were on the source. This, coupled with
the ability to reduce the TTL (Time to Live) value of the EVS DNS record (optional), allows a more
seamless failover.
Prerequisites
Before you can use the Application Manager to protect a cluster with a like-named cluster, you must
complete the following:

Each target server node must have the same version and service pack level of Exchange as is
installed on the source nodes.

The target must have a resource group that has the same name as the resource group on the
source.

The target resource group only needs to contain physical disk resources, which MUST use the
same drive letters that are used by the physical disk resources on the source.
Permissions
When protecting a cluster with a like-named cluster, you can perform the setup, failover, and failback
with the following permissions:

The user must be a member of the local Storage Mirroring Admin group.

The user must be a member of the local Administrators group on all cluster nodes.

The user must be delegated Full Exchange Administrator access through Exchange System
Manager.

(Optional) In order to change the TTL within DNS during failover, the user must be a member of
the DnsAdmins group.
Multiple EVS
The instructions in this chapter also apply to setting up multiple EVS. There are two ways to perform
multiple EVS failover:

Set up multiple like-name jobs for each EVS on your source cluster, as described in this chapter.
NOTE: Like-named cluster support is only available for clusters running Exchange 2003. It is not
available for Exchange 2007.