You might choose LCR because:
??‘ High availability is required for just Exchange and not the hardware
??‘ High availability is required for specific sets of users, not everyone
??‘ Ability to use low - cost DAS storage
??‘ Ability to use a variety of hardware ??” not restricted to WHCL certification
Standby Continuous Replication
Standby Continuous Replication is a new option for site resiliency introduced in Service Pack 1. SCR
uses the same continuous replication as CCR and LCR, but it has some key differences:
??‘ There can be multiple CCR targets per storage group
??‘ The replication can be delayed allowing for network bandwidth control and prevention of
logical data corruption
??‘ It is not possible to back up an SCR copy
The SCR source can be a stand - alone mailbox server, an LCR - enabled mailbox server, a Single Copy
Cluster, or a CCR cluster. The SCR target can be a stand - alone mailbox server, or a clustered server that
does not have a Clustered Mailbox Server configured. Some of these options are shown in Figure 12 - 3 .
Chapter 12: Working with Continuous Replication
333
Figure 12-3
As mentioned previously, it is possible to create multiple SCR targets for a single SCR source. For
example, a company may have a main datacenter and use CCR to provide local high availability, and
configure two SCR targets ??” each in different physical locations.
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