HP Storage Mirroring Software - Manual (Page 51)

Storage Mirroring Recover requirements Page 50 of 677
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Like-named cluster protection—If you are using Exchange 2003, you can protect
a cluster with a like-named cluster, also known as a standby cluster. Storage
Mirroring Recover will move the Exchange virtual server from the source cluster to
the target cluster. The process of moving users and public folders from one server
to another is not needed because users will continue to use the same mail store on
the target as they were on the source. The like-named cluster environment must
meet the following requirements.
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All nodes on the source and target clusters must have the same Exchange
version and service pack.
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The source and target clusters must have the same Exchange resource
group name.
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The target resource group only needs to contain physical disk resources,
however they must use the same drive letters that are used by the physical
disk resources on the source.
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Application Manager will create temporary name and IP address resources
on the target cluster for Storage Mirroring Recover mirroring and replication.
A DNS entry is created based on the target's owning node DNS server. If the
source and target owning nodes are configured to use different DNS servers,
this can cause issues when enabling protection. If you have issues enabling
protection in this configuration, verify that the source's owning node DNS
server is correctly set up to receive DNS zone updates from the target's
owning node DNS server, or reload the forward and reverse zones using the
dnsmgmt utility.
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The user configuring the like-named cluster protection in the Application
Manager must be a member of the local administrator and Double-Take
Admin groups on all cluster nodes. Additionally, the user must be delegated
Full Exchange Administrator access through Exchange System Manager.
Optionally, the user must be a member of the DnsAdmins group if you want to
be able to update the Time to Live DNS attribute.
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If you have multiple Exchange virtual servers, you can configure multiple like-
named cluster protection connections, or you can failover multiple Exchange
virtual servers to pre-existing Exchange virtual servers on the target.
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Security—By default, the Storage Mirroring service is configured to use the local
system account. If you are protecting Exchange, you cannot change this
configuration.
Note: If you are protecting Exchange in a 2008 R2 domain where the domain
functional level is set to R2, you must grant two levels of access to the local
system account on the target. First, grant the Administer information store