HP Storage Mirroring Software - Manual (Page 46)

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Full server workload requirements
If you will be protecting your entire server, there are no separate source or target server
requirements. However, the general source and target requirements are high-level
requirements that each server must meet for the full-server functionality. A target server
may meet these requirements but may not be suitable to stand-in for a source in the
event of a source failure. See
Finding a compatible target for additional information
regarding an appropriate target server for your source.
There is one limitation for full-server protection of a cluster. Microsoft clusters identify
disks by their disk signature, which is stored on the physical disk in the master boot
record. When Storage Mirroring Recoveris used to failover a cluster node, the disk
signature of the target will be different than the source and the cluster will fail to start.
Therefore, Storage Mirroring Recover does not natively support the full-server protection
of Microsoft cluster nodes. However, you can alter the disk signature on the target
manually. See the
Microsoft Knowledge Base article 280425 for details on how to
change the disk signature.
If you are using Small Business Server, you will need to check with your NAS vendor to
verify if there are technical or license restrictions on failing over an image of a server to
different hardware.
Microsoft Server Core is only supported in a Server Core to Server Core configuration.