...currency of data. Applications run in an active/standbymode (application resources are only available to one node...application recovery. Applications run in the active/standbymode with application data replicated between data centers...
http://www.computerweekly.com/DowntimePDF/pdf/4AA0_6737ENW.pdf
...center. An additional four-processor machine is connected to the SAN in the secondary data center and configured in standbymode. VMware SAN volumes and other NetApp volumes are mirrored to the FAS960 in the secondary data center using NetApp SnapMirror...
http://www.findwhitepapers.com/whitepaper2057/