HP Storage Mirroring Software - Manual (Page 12)

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Sample configurations
Storage Mirroring is an exceptionally flexible product that can be used in a wide variety of network
configurations. To implement Storage Mirroring effectively, it is important to understand the possible
configuration options and their relative benefits. Storage Mirroring configuration options can be used
independently or in varying combinations.
One-to-one, active/standby
NOTE: The Storage Mirroring replication and failover features have different server
requirements. If you use Storage Mirroring to monitor and stand in for failed servers, the
source and target must have identical versions of operating system and applications. By
contrast, Storage Mirroring replication operations do not require that the source and
target servers have identical versions of operating system and applications.
Description One target server, having no production activity, is dedicated to support one
source server. The source is the only server actively replicating data.
Applications This configuration is appropriate for offsite disaster recovery, failover, and
critical data backup. This is especially appropriate for critical application
servers such as Exchange, SQL Server, and web servers.
This is the easiest configuration to implement, support, and maintain.
Considerations This configuration requires the highest hardware cost because a target server
is required for every source server.
Source
(Active)
Target
(Standby)