HP Storage Mirroring V5 Software - Manual (Page 41)

HP StorageWorks Storage Mirroring Application Manager user’s guide 31
4 Protecting an Exchange Cluster with a Like-Named
Cluster
This section describes the process used to configure protection for an Exchange 2003 cluster with a like-named
(also known as a “standby”) cluster.
When you protect a cluster with a like-named cluster, the Storage Mirroring 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 Storage Mirroring 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.
NOTE: Like-named cluster support is only available for clusters running Exchange 2003.
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 “Double-Take Admin” group.
• The user must be a member of the cluster Administrator group.
• The user must be delegated Exchange View Only 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. To use multiple EVS, set up multiple
like-name jobs for each EVS on your source cluster.
NOTE: Because the first installed EVS is the only one that has the MTA resource (Message Transfer Agent), if
you do not failover all Exchange virtual servers, then any user who is in a different mail store than the first one
will not be able to route mail.
Standby cluster configuration
The process for protecting a cluster with a like-named cluster is similar to protecting a standard cluster. The
following instructions point out the differences in configuration. For more information about basic protection
functions, see the section ” Protecting an Exchange Server ” on page 15.
1. In the Source Server field, select the source cluster that you want to protect.
2. In the Target Server field, select the same server.