The volume replication methods vary by cost and the hardware.
If your system is using a SAN or similar storage, you may want to use the VSS tools supplied by the hardware provider, or Microsoft Windows Volume Shadow Copy Services.
As a low-cost alternative, you may want to rely on the Robocopy (http://social.technet.microsoft.com/wiki/contents/articles/1073.robocopy-and-a-few-examples.aspx) or similar tools, running in the Windows scheduler.
It is worthwhile to plan different volume replications:
•For the frequently changed or critical data: such data should be replicated each minute, or each 2-3 minutes.
•For the data that changes rarely: such data should be replicated once a day.
•For data that changes very rarely: such data should be replicated once a day.
See also